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Reconfigurable optoelectronic transistors for multimodal recognition
Reconfigurable neuromorphic transistors are important for creating compact and efficient neuromorphic computing networks. Here, Li et al. introduce an optoelectronic electrolyte-gated transistor to perform multimodal recognition.
- Pengzhan Li
- , Mingzhen Zhang
- & Chen Ge
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Article
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On the role of asymmetric molecular geometry in high-performance organic solar cells
The correlation between asymmetric molecular geometry of non-fullerene acceptors and their optoelectronic properties was unclear. Here, the authors found asymmetric ones exhibit increased open-circuit voltage compared to their symmetric counterparts due to reduced non-radiative charge recombination.
- Jinfeng Huang
- , Tianyi Chen
- & Lijian Zuo
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Article
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Tunable stochastic memristors for energy-efficient encryption and computing
Integrating security, computing and memory capabilities in ion-migration-driven memristors is challenging. Here, Woo et al. experimentally demonstrates a single system that performs cryptographic key generation, universal Boolean logic operations, and encryption/decryption.
- Kyung Seok Woo
- , Janguk Han
- & Cheol Seong Hwang
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Article
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Dynamic multicolor emissions of multimodal phosphors by Mn2+ trace doping in self-activated CaGa4O7
Achieving dynamic multimodal luminescence in a single material is promising but challenging. Here, the authors engineer a phosphor with dynamic multicolor luminescence and photo-thermomechanically responsive emissions by adding Mn2+ to a self-activated CaGa4O7 host.
- Yiqian Tang
- , Yiyu Cai
- & Jun-Cheng Zhang
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Article
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Bright, efficient, and stable pure-green hyperfluorescent organic light-emitting diodes by judicious molecular design
The device performance of pure-green hyperfluorescent organic light-emitting diodes remains unsatisfactory. Here, the authors report multi-resonance emitters with extended π−conjugation or increased donor strength, resulting in bright, efficient and stable pure-green hyperfluorescent devices.
- Yi-Ting Lee
- , Chin-Yiu Chan
- & Chihaya Adachi
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Article
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Strain-insensitive viscoelastic perovskite film for intrinsically stretchable neuromorphic vision-adaptive transistors
Wearable neuromorphic optoelectronics require stretchable photosensitive materials and multifunctional integration. Here, authors develop intrinsically stretchable neuromorphic vision-adaptive transistors for skin-like neuromorphic vision systems.
- Chengyu Wang
- , Yangshuang Bian
- & Yunlong Guo
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Article
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Ultrafast piezocapacitive soft pressure sensors with over 10 kHz bandwidth via bonded microstructured interfaces
Piezocapacitive pressure sensors are typically limited by the slow response-relaxation speed for detecting dynamic stimuli. Here, Zhang et al. utilize the electrode-dielectric interface and bonded micro-structured interface for energy dissipation and reduce the response and relaxation time to 0.04 ms.
- Yuan Zhang
- , Xiaomeng Zhou
- & Chuan Fei Guo
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Article
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Essential role of lattice oxygen in hydrogen sensing reaction
Understanding the sensing mechanism of metal oxide semiconductors is imperative for developing high-performance sensors. Here, the participation of lattice oxygen, caused by additional Ge, boosts the hydrogen sensing ability of SnO2.
- Jiayu Li
- , Wenzhe Si
- & Guo-Dong Li
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Article
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Modified t-butyl in tetradentate platinum (II) complexes enables exceptional lifetime for blue-phosphorescent organic light-emitting diodes
It has been challenging to realize efficient and stable blue phosphorescent organic light-emitting diodes. Here, authors explore the effect of substitution position in platinum(II) dopants with suppressed metal-metal-to-ligand charge transfer features, resulting in prolonged lifetime in the devices.
- Young Hun Jung
- , Gyeong Seok Lee
- & Jang Hyuk Kwon
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Article
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Low thermal contact resistance boron nitride nanosheets composites enabled by interfacial arc-like phonon bridge
Boron nitride nanosheets possess high in-plane thermal conductivity and high thermal contact resistance. Here the authors discover obliquely aligned nanosheets at the interface can act as a phonon bridge to lower the contact resistance.
- Ke Zhan
- , Yucong Chen
- & Ling Qiu
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Article
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Flash healing of laser-induced graphene
Laser-induced graphene (LIG) can be obtained via a practically convenient approach, but its amorphous characteristics limit its applications. Here, the authors report a flash Joule heating strategy to improve the crystalline quality and conductivity of LIG, leading to strain sensors with enhanced sensitivity.
- Le Cheng
- , Chi Shun Yeung
- & Ruquan Ye
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Article
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A modular organic neuromorphic spiking circuit for retina-inspired sensory coding and neurotransmitter-mediated neural pathways
The distinctive interdependence in mixed ionic-electronic conductors emulates retinal pathway. Here, the authors develop a modular organic neuromorphic spiking circuit to replicate the interdependent functions of receptors, neurons and synapses that are chemically modulated by neurotransmitters.
- Giovanni Maria Matrone
- , Eveline R. W. van Doremaele
- & Yoeri van de Burgt
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Article
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Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter
The realization of a BT.2020 blue emitter is challenging due to the spectral redshift associated with π-extension. Here, the authors report a multi-resonance thermally activated delayed fluorescence emitter, exhibiting ultrapure deep-blue narrow emission and CIEy ≤ 0.05 exceeding 20% efficiency.
- Junki Ochi
- , Yuki Yamasaki
- & Takuji Hatakeyama
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Article
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Full integration of highly stretchable inorganic transistors and circuits within molecular-tailored elastic substrates on a large scale
Developing integrated stretchable metal-oxide transistors and circuits is challenging. Here, Kang et al. leveraged molecular-tailored elastic substrates for enhanced adhesion, thus achieving high performance and logical operation across various circuits under high strain.
- Seung-Han Kang
- , Jeong-Wan Jo
- & Sung Kyu Park
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Article
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Flexible large-area ultrasound arrays for medical applications made using embossed polymer structures
Current ultrasound transducers are bulky and rigid. Here, the authors describe a new way to realize large-area and mechanically flexible ultrasound arrays on polymer foils suited for wearable ultrasound applications
- Paul L. M. J. van Neer
- , Laurens C. J. M. Peters
- & Gerwin H. Gelinck
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Article
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Magnetic field filtering of the boundary supercurrent in unconventional metal NiTe2-based Josephson junctions
The authors study Josephson junctions where the weak link is a NiTe2 flake. They find that in-plane magnetic field in a particular direction causes the supercurrent to concentrate in the edges of the flake, excluding the bulk. They further argue that the supercurrent is carried by higher-order hinge states.
- Tian Le
- , Ruihan Zhang
- & Fanming Qu
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Article
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One-photon three-dimensional printed fused silica glass with sub-micron features
3D-printed glass holds great potential. However, it is challenging to control both the dimension and the resolution of the printed material. Here, authors present a one-photon 3D printing approach to produce high-performance fused silica glass with sub-micron resolution and millimetric dimensions.
- Ziyong Li
- , Yanwen Jia
- & Xiewen Wen
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Article
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Decreasing exciton dissociation rates for reduced voltage losses in organic solar cells
The device’s electroluminescence efficiency is vital to reduce non-radiative voltage losses and boost organic solar cell performance. Here, the authors demonstrate that this efficiency is influenced not only by the decay of charge transfer states but also by the dissociation of singlet states.
- Hongbo Wu
- , Hao Lu
- & Zheng Tang
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Article
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Quantifying the interfacial triboelectricity in inorganic-organic composite mechanoluminescent materials
Mechanoluminescence enables sensing applications of mechanical stimuli. Here, the authors reveal the importance of interfacial triboelectricity to this phenomenon in inorganic-organic composite materials.
- Xin Pan
- , Yixi Zhuang
- & Rong-Jun Xie
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Article
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A detachable interface for stable low-voltage stretchable transistor arrays and high-resolution X-ray imaging
Pixel size, power consumption, and stability of stretchable optoelectronic devices limit their application in digital imaging. Bian et al. developed a universal detachable interface technique for damage-free micropattern, reproducible transfer and ideal heterocontact of intrinsically stretchable electrodes.
- Yangshuang Bian
- , Mingliang Zhu
- & Yunlong Guo
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Article
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Multiscale reconfiguration induced highly saturated poling in lead-free piezoceramics for giant energy conversion
There are difficulty of achieving saturated poling and understanding of multi-scale structures in (K, Na)NbO3 ceramics. Here, the authors find atomic-scale polymorphic distortion and micrometer-scale high-density thin striped domains, which is key for high saturated poling.
- Jinfeng Lin
- , Jin Qian
- & Haijun Wu
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Article
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Height-renderable morphable tactile display enabled by programmable modulation of local stiffness in photothermally active polymer
The controllability of deformation height in reconfigurable touch displays currently limits their deliverable information. Hwang et al. present a light-triggered morphable tactile display enabling generation of refreshable, height-adjustable, and latchable 3D topologies with varying textures on a thin film surface.
- Inwook Hwang
- , Seongcheol Mun
- & Sungryul Yun
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Article
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Strain regulates the photovoltaic performance of thick-film perovskites
The power conversion efficiencies of thick-film perovskite solar cells lag behind those with nanometre film thickness. Here, the authors rule out the restrictions of carrier lifetime on device performance and reveal the critical role of lattice strain in micron-scale thick perovskite films.
- Pengju Shi
- , Jiazhe Xu
- & Rui Wang
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Article
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Flexible temperature-pressure dual sensor based on 3D spiral thermoelectric Bi2Te3 films
A three-dimensional spiral architecture is used to exploit both thermoelectric and piezoelectric properties of Bi2Te3 films to make a combined temperature and pressure sensor in a single material, with applications such as electronic skin.
- Hailong Yu
- , Zhenqing Hu
- & Kaiping Tai
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Article
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Contribution of irreversible non-180° domain to performance for multiphase coexisted potassium sodium niobate ceramics
Seeking eco-friendly materials with equivalent performance to lead-based piezoelectric materials remains an urgent demand. Here, the authors design potassium–sodium niobate-based lead-free piezoelectric materials with large potential.
- Bo Wu
- , Lin Zhao
- & Ke Wang
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Article
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Broadband nonlinear modulation of incoherent light using a transparent optoelectronic neuron array
Merging 2D transparent phototransistors and liquid crystal modulators, authors report an optoelectronic neuron array for self-amplitude modulation of spatially incoherent light, achieving a large nonlinear contrast over a broad spectrum at orders-of-magnitude lower intensity.
- Dehui Zhang
- , Dong Xu
- & Xiangfeng Duan
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Article
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Universal growth of perovskite thin monocrystals from high solute flux for sensitive self-driven X-ray detection
Liu et al. report a universal solution growth method for perovskite thin monocrystals by improving the mass transfer in the high solute flux system. The approach is applied to 29 types of perovskites with growth velocity up to 27.2 µm min-1 and enables efficient self-driven X-ray detectors.
- Da Liu
- , Yichu Zheng
- & Yu Hou
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Article
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Biomimetic nanocluster photoreceptors for adaptative circular polarization vision
All-in-one multi-task photoperception is desirable for artificial vision systems. Wen et al. present wafer-scale high density integration of artificial photoreceptors that combine photoadaptation and circular polarized light vision, enabled by chiral-nanocluster-conjugated molecule heterostructures.
- Wei Wen
- , Guocai Liu
- & Yunqi Liu
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Article
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Triboelectric micro-flexure-sensitive fiber electronics
Fiber electronics for monitoring micro-physiological activities are limited by their sensitivity at micro-flexure deformation. Here, Lin et al. report a micro-flexure-sensitive fiber with nanofiber buckling and ion conduction mechanism. Wearable biomechanical feedback system is demonstrated using the woven textile.
- Shaomei Lin
- , Weifeng Yang
- & Hongzhi Wang
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Article
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Understanding of complex spin up-conversion processes in charge-transfer-type organic molecules
Kim et al. propose a model for the complex spin-flip process in charge-transfer-type thermally activated delayed fluorescence molecules, uncovering the origin of the high-lying triplet state, addressing a pressing issue discussed over the last decade.
- Hyung Suk Kim
- , Sang Hoon Lee
- & Chihaya Adachi
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Article
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Pushing the thinness limit of silver films for flexible optoelectronic devices via ion-beam thinning-back process
The use of thin silver films with nanometric thickness for optoelectronic devices is essential for high transparency, flexibility, and electrical properties. Ma et al. report a thinning-back process with a flood ion beam, to further reduce film thickness down to 4.5 nm.
- Dongxu Ma
- , Ming Ji
- & Huigao Duan
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Article
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Speaking without vocal folds using a machine-learning-assisted wearable sensing-actuation system
Addressing challenges in voice disorders, the authors present a self-powered, wearable sensor-actuator system based on magnetoelasticity. This innovation enables assisted speaking by capturing laryngeal movements and translating them into voice signals, bypassing the vocal folds.
- Ziyuan Che
- , Xiao Wan
- & Jun Chen
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Article
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High-performance bifacial perovskite solar cells enabled by single-walled carbon nanotubes
The suboptimal optical transmittance of back electrodes and complex fabrication process hindered development of bifacial perovskite solar cells. Here, authors apply single-walled carbon nanotubes as front and back electrodes, achieving power generation density of 36% and bifaciality factor of 98%.
- Jing Zhang
- , Xian-Gang Hu
- & Wei Zhang
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Article
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Fully inkjet-printed Ag2Se flexible thermoelectric devices for sustainable power generation
Ag2Se-based flexible thermoelectric devices are fabricated by inkjet printing technology, which demonstrate exceptional power generation performance owing to unique patterning capability and high-resolution device integration.
- Yan Liu
- , Qihao Zhang
- & Wan Jiang
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Article
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Tri-system integration in metal-oxide nanocomposites via in-situ solution-processed method for ultrathin flexible transparent electrodes
Fabricating flexible transparent electrodes with robust operational stability alongside electrical and mechanical properties is challenging. Here, Kim et al. develop ultrathin flexible transparent electrodes using in-situ solution-processing and unveil interface dynamics of the integrated tri-system.
- John Jinwook Kim
- , Kojima Shuji
- & Wallace C. H. Choy
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Article
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Room temperature chirality switching and detection in a helimagnetic MnAu2 thin film
Some materials have an internal degree of freedom called chirality, such as helimagnets, where the magnetic order has a helix structure with a specific chirality. Here, Masuda et al. demonstrate chirality switching and detection at room temperature in helimagnetic MnAu2 thin films.
- Hidetoshi Masuda
- , Takeshi Seki
- & Yoshinori Onose
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Article
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Neuromorphic antennal sensory system
Artificial sensory systems are often limited in structure and functionality. Here, Jiang et al. report a neuromorphic antennal sensory system that achieves spatiotemporal perception of vibrotactile and magnetic stimuli, showcasing biomimetic perceptual intelligence.
- Chengpeng Jiang
- , Honghuan Xu
- & Wentao Xu
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Article
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3D-integrated multilayered physical reservoir array for learning and forecasting time-series information
A wide reservoir computing system is an advanced architecture. However, its hardware implementation remains elusive due to the lack of 3D architecture framework. Choi et al. demonstrate such hardware made of a multilayered 3D stacked memristive crossbar array for efficient learning and forecasting.
- Sanghyeon Choi
- , Jaeho Shin
- & Gunuk Wang
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Review Article
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Hardware implementation of memristor-based artificial neural networks
Memristors hold promise for massively-parallel computing at low power. Aguirre et al. provide a comprehensive protocol of the materials and methods for designing memristive artificial neural networks with the detailed working principles of each building block and the tools for performance evaluation.
- Fernando Aguirre
- , Abu Sebastian
- & Mario Lanza
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Article
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Long-term monitoring of ultratrace nucleic acids using tetrahedral nanostructure-based NgAgo on wearable microneedles
Monitoring of biomarkers with wearable devices holds potential for personal health management. Here the authors demonstrate a wearable device based on tetrahedral DNA nanostructures and prokaryotic argonaute to monitor real-time sepsis-associated nucleic acid
- Bin Yang
- , Haonan Wang
- & Xueen Fang
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Article
| Open Access
Crystallization of piezoceramic films on glass via flash lamp annealing
Direct growth of piezoelectric oxides on glass is difficult due to high processing temperatures. Here, the authors demonstrate a flash lamp process for the growth of films on various glasses in a few seconds only. The films have piezoelectric e33,f of −5 C m−2 and can be used in haptic devices.
- Longfei Song
- , Juliette Cardoletti
- & Sebastjan Glinšek
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Article
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Epitaxy of wafer-scale single-crystal MoS2 monolayer via buffer layer control
2D MoS2 is being intensively investigated as a promising candidate to extend the downscaling of electronic devices. Here, the authors report a buffer-layer-control method for the growth of wafer-scale single-crystalline MoS2 monolayers on industry-compatible sapphire substrates with competitive optical and electronic properties.
- Lu Li
- , Qinqin Wang
- & Guangyu Zhang
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Article
| Open Access
In-vivo integration of soft neural probes through high-resolution printing of liquid electronics on the cranium
Neural systems are often bulky and heavy. Here, the authors produce a conformable neural interface for mice using liquid metals directly printed on the skull that can monitor neural activities with long-term stability.
- Young-Geun Park
- , Yong Won Kwon
- & Jang-Ung Park
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Article
| Open Access
Reconfigurable perovskite X-ray detector for intelligent imaging
In-sensor computing requires detectors with polarity reconfigurability and linear responsivity. Pang et al. report a CsPbBr3 perovskite single crystal X-ray detector for edge extraction imaging with a data compression ratio of 46.4% and classification task with an accuracy of 100%.
- Jincong Pang
- , Haodi Wu
- & Guangda Niu
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Article
| Open Access
Self-regulated reversal deformation and locomotion of structurally homogenous hydrogels subjected to constant light illumination
Environmentally adaptive hydrogels have great potential as soft robotics but achieving self-regulated reversal shape deformation in homogenous hydrogels under a constant stimulus is challenging. Here, the authors report responsive hydrogels functionalized with two photoswitchable spiropyrans that exhibit self-regulated transient deformation reversal when subjected to constant illumination.
- Kexin Guo
- , Xuehan Yang
- & Chuang Li
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Article
| Open Access
High-order sensory processing nanocircuit based on coupled VO2 oscillators
It is challenging to create efficient and compact neuromorphic sensory system based on nano-scale nonlinear dynamics. Yang et al. present a capacitance-coupled VO2 oscillatory network, which serves as a continuous-time dynamic system for sensory pre-processing, enabling tasks such as touch and gesture recognition.
- Ke Yang
- , Yanghao Wang
- & Yuchao Yang
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Article
| Open Access
Computational design of ultra-robust strain sensors for soft robot perception and autonomy
Due to the deformable nature of soft robots, developing robust sensors that can sustain stability and performance is a challenge. Here, the authors report a computational strain sensor design based on a programmed crack array for predictable, tunable, and stable sensing performance.
- Haitao Yang
- , Shuo Ding
- & Ghim Wei Ho
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Article
| Open Access
Dynamic X-ray imaging with screen-printed perovskite CMOS array
Biomedical X-ray imaging requires high spatial and temporal resolution of the detectors. Liu et al. report a screen-printed perovskite direct-conversion X-ray CMOS imager with a spatial resolution of 5 lp mm−1 and a speed of 300 fps for low-dose 2D radiography and 3D computed tomography imaging.
- Yanliang Liu
- , Chaosong Gao
- & Yongshuai Ge
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Article
| Open Access
A hybrid transistor with transcriptionally controlled computation and plasticity
Interfacing living systems with electronics for biosensing and biocomputing applications is challenging. Here, Gao et al. present hybrid transistors with electroactive bacteria capable of extracellular electron transfer, enabling transduction of biological computations to electrical readouts.
- Yang Gao
- , Yuchen Zhou
- & Benjamin K. Keitz
Intelligent perceptual textiles based on ionic-conductive and strong silk fibers