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Key requirements for ultraefficient sensitization in hyperfluorescence organic light-emitting diodes
Moderately efficient TADF emitters can play the role of surprisingly good sensitizers in hyperfluorescent blue organic light-emitting diodes.
- Kleitos Stavrou
- , Larissa G. Franca
- & Andrew P. Monkman
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Article
| Open Access
Bright and stable near-infrared lead-free perovskite light-emitting diodes
Controlling the intrinsic doping of lead-free perovskites enables near-infrared LEDs emitting at 948 nm with a peak radiance of 226 W sr–1 m–2 and a half-lifetime of 39.5 h.
- Fanglong Yuan
- , Giulia Folpini
- & Feng Gao
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Article |
Bond-selective fluorescence imaging with single-molecule sensitivity
Two-photon excitation with mid- and near-infrared pulses encodes bond selectivity in fluorescence imaging. Single-molecule imaging and spectroscopy is demonstrated on individual fluorophores as well as various labelled biological targets.
- Haomin Wang
- , Dongkwan Lee
- & Lu Wei
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Article |
Hard X-ray helical dichroism of disordered molecular media
Linearly polarized orbital angular momentum-carrying hard X-ray beams are induced using spiral Fresnel zone plates. By sending the hard X-ray beams to disordered enantiopure molecular complexes, the helicity-dependent and chiral-sensitive signal is obtained.
- Jérémy R. Rouxel
- , Benedikt Rösner
- & Majed Chergui
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Article |
Suppression of temperature quenching in perovskite nanocrystals for efficient and thermally stable light-emitting diodes
Fluoride-treated CsPbBr3 nanocrystals emit light with near unity efficiency at temperatures of up to 373 K.
- Mingming Liu
- , Qun Wan
- & Liang Li
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Article |
Overcoming the energy gap law in near-infrared OLEDs by exciton–vibration decoupling
Pt(ii) complexes allow the fabrication of efficient near-infrared organic light-emitting diodes that operate beyond the 900 nm region.
- Yu-Chen Wei
- , Sheng Fu Wang
- & Pi-Tai Chou
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Letter |
Light-induced magnetism in plasmonic gold nanoparticles
Optically induced magnetization is experimentally demonstrated using gold nanoparticles. The inverse-Faraday-effect-enabled magnetization may lead to new types of compact optical isolator.
- Oscar Hsu-Cheng Cheng
- , Dong Hee Son
- & Matthew Sheldon
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Comment |
Best practices for measuring emerging light-emitting diode technologies
The arrival of light-emitting diodes based on new materials is posing challenges for the characterization and comparison of devices in a trusted and consistent manner. Here we provide some advice and guidelines that we hope will benefit the community.
- Miguel Anaya
- , Barry P. Rand
- & Samuel D. Stranks
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Photodoping through local charge carrier accumulation in alloyed hybrid perovskites for highly efficient luminescence
Localized photodoping in mixed-cation perovskites is shown to modify charge-carrier recombination and thus offer a route for more efficient light emission.
- Sascha Feldmann
- , Stuart Macpherson
- & Felix Deschler
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Letter |
Stimulated Raman excited fluorescence spectroscopy and imaging
A hybrid technique of stimulated Raman excited fluorescence that integrates superb detection sensitivity and fine chemical specificity is demonstrated, offering all-far-field single-molecule Raman spectroscopy and imaging without plasmonic enhancement.
- Hanqing Xiong
- , Lixue Shi
- & Wei Min
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Article |
High-efficiency perovskite–polymer bulk heterostructure light-emitting diodes
Near-infrared perovskite–polymer light-emitting diodes (LEDs) with external quantum efficiencies of up to 20.1% are reported.
- Baodan Zhao
- , Sai Bai
- & Dawei Di
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Article |
Hybrid perovskite films approaching the radiative limit with over 90% photoluminescence quantum efficiency
Surface treatment is shown to yield passivated perovskite films with very high quasi-Fermi level splitting and internal photoluminescence quantum efficiency, indicating that further improvements in the performance of perovskite optoelectronics should be feasible.
- Ian L. Braly
- , Dane W. deQuilettes
- & Hugh W. Hillhouse
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Article |
Enrichment of molecular antenna triplets amplifies upconverting nanoparticle emission
Lanthanide-doped upconverting nanoparticles exhibiting a 33,000 times increase in brightness and a 100 times increase in efficiency over bare upconverting nanoparticles are demonstrated. The findings are relevant in fields from solar energy to biophotonics.
- David J. Garfield
- , Nicholas J. Borys
- & P. James Schuck
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Article |
Room-temperature ultrafast nonlinear spectroscopy of a single molecule
Frequency-resolved transient excited-state absorption of a single molecule is measured at room temperature. The dynamic Stokes shift and vibrational cooling are directly measured with 25 fs temporal resolution and a spectral detection bandwidth of hundreds of meV.
- Matz Liebel
- , Costanza Toninelli
- & Niek F. van Hulst
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Article |
Boson sampling for molecular vibronic spectra
A quantum simulation scheme is proposed for molecular vibronic spectra, a problem for which no efficient classical algorithm is currently known. The simulation is efficiently performed on a boson sampling machine simply by modifying the input state.
- Joonsuk Huh
- , Gian Giacomo Guerreschi
- & Alán Aspuru-Guzik
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Article |
Einstein–Bohr recoiling double-slit gedanken experiment performed at the molecular level
The authors observe electron interference using the Auger electron emitted from an O2 molecule ionized by a soft X-ray photon. The interference disappears when the location of the O+ can be determined from the final state observed.
- Xiao-Jing Liu
- , Quan Miao
- & Catalin Miron
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Article |
Band filling with free charge carriers in organometal halide perovskites
Femtosecond transient absorption spectroscopy measurements indicate that the dominant relaxation pathway for excited states in perovskite materials is by recombination of free electrons and holes.
- Joseph S. Manser
- & Prashant V. Kamat
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Article |
Through-skull fluorescence imaging of the brain in a new near-infrared window
Near-infrared photoluminescence from carbon nanotubes makes it possible to optically image the vasculature in the brain directly through the skull.
- Guosong Hong
- , Shuo Diao
- & Hongjie Dai
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Article |
Seeing a single molecule vibrate through time-resolved coherent anti-Stokes Raman scattering
The vibrations of the chemical bonds of a single molecule are observed by employing time-resolved coherent anti-Stokes Raman scattering. A gold nanoantenna is used to enhance the signal from the molecule.
- Steven Yampolsky
- , Dmitry A. Fishman
- & Vartkess A. Apkarian
Single-protein optical holography