Featured
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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 |
Hydroxypropyl cellulose photonic architectures by soft nanoimprinting lithography
Biodegradable cellulose-based photonic and plasmonic architectures are fabricated via soft nanoimprinting lithography, and are used for structural colour generation, photoluminescence enhancement and as disposable surface-enhanced Raman scattering substrates.
- André Espinha
- , Camilla Dore
- & Agustín Mihi
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Article |
Diboron compound-based organic light-emitting diodes with high efficiency and reduced efficiency roll-off
Organic light-emitting diodes featuring the compounds CzDBA and tBuCzBDA are shown to not only offer high external quantum efficiency, but also minimal reduction in performance at high brightness.
- Tien-Lin Wu
- , Min-Jie Huang
- & Chien-Hong Cheng
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Article |
Bright colloidal quantum dot light-emitting diodes enabled by efficient chlorination
Green light-emitting diodes with a brightness of 460,000 cd m–2 and a low turn-on voltage of 2.5 V are enabled by the use of a chlorination treatment to provide conductive passivation of the devices.
- Xiyan Li
- , Yong-Biao Zhao
- & Edward H. Sargent
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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 |
Plasmonic coupling at a metal/semiconductor interface
The role of direct plasmonic coupling in hot-electron generation at Ag/TiO2 interfaces is clarified by two-photon photoemission spectroscopy.
- Shijing Tan
- , Adam Argondizzo
- & Hrvoje Petek
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Article |
Giant light-harvesting nanoantenna for single-molecule detection in ambient light
Donor dye nanoparticles have been used to realize structures that are 25 times brighter than quantum dots. This enabled single-molecule imaging using ambient light.
- Kateryna Trofymchuk
- , Andreas Reisch
- & Andrey S. Klymchenko
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Article |
Dye-sensitized solar cells for efficient power generation under ambient lighting
A dye-sensitized solar cell that has been designed for efficient operation under indoor lighting could offer a convenient means for powering the Internet of Things.
- Marina Freitag
- , Joël Teuscher
- & Anders Hagfeldt
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Letter |
Spatially segregated free-carrier and exciton populations in individual lead halide perovskite grains
A study of single grains of lead halide perovskite reveals the presence of both excitons and free charge carriers.
- S. Nah
- , B. Spokoyny
- & E. Harel
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Letter |
Solution-processed organic tandem solar cells with power conversion efficiencies >12%
Careful selection of small-molecule materials provides solution-processed tandem organic solar cells with a boost in efficiency.
- Miaomiao Li
- , Ke Gao
- & Yongsheng Chen
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Article |
Optical microresonators as single-particle absorption spectrometers
Single-particle double-modulation absorption spectrometers based on whispering-gallery-mode microresonators achieve sub-100-Hz sensitivity to photothermal resonance shifts and allow for the study of arrays of Fano resonances in the context of plasmonic–photonic hybridization.
- Kevin D. Heylman
- , Niket Thakkar
- & Randall H. Goldsmith
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Letter |
Removing orientation-induced localization biases in single-molecule microscopy using a broadband metasurface mask
A custom-designed metamaterial mask helps improve the accuracy of microscopy of single fluorescent molecules.
- Mikael P. Backlund
- , Amir Arbabi
- & W. E. Moerner
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Article |
Near-field dielectric scattering promotes optical absorption by platinum nanoparticles
A technique to enhance optical absorption by platinum nanoparticles is exploited for driving photocatalytic redox reactions.
- Nan Zhang
- , Chuang Han
- & Yugang Sun
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Interview |
Flat talk
Fengnian Xia from Yale University shares his opinions with Nature Photonics on the status of research into 2D materials and their prospects for commercial applications.
- Rachel Won
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Article |
Bulk heterojunction perovskite–PCBM solar cells with high fill factor
Bulk heterojunction perovskite solar cells with a high fill factor are reported.
- Chien-Hung Chiang
- & Chun-Guey Wu
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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 |
Efficient inverted polymer solar cells employing favourable molecular orientation
Molecular orientation in polymer solar cells is shown to play an important role in device performance.
- Varun Vohra
- , Kazuaki Kawashima
- & Hideyuki Murata
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Correspondence |
The true status of solar cell technology
- K. D. G. Imalka Jayawardena
- , Lynn J. Rozanski
- & S. Ravi P. Silva
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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
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Letter |
Tip-enhanced infrared nanospectroscopy via molecular expansion force detection
Mid-infrared spectroscopy with nanometre spatial resolution is highly desired for materials and life sciences applications. A nanoscale mid-infrared spectrometer is demonstrated that detects mechanical forces exerted by molecules on an atomic force microscope tip upon light excitation. It operates under ambient conditions with a high sensitivity and a spatial resolution of better than 25 nm.
- Feng Lu
- , Mingzhou Jin
- & Mikhail A. Belkin
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News & Views |
Tunable lifetime nanocrystals
Tuning the luminescence lifetimes of upconversion nanocrystals through lanthanide doping provides new opportunities for optical multiplexing in the time domain for applications in imaging and security marking.
- Renren Deng
- & Xiaogang Liu
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Article |
Perovskite solar cells with a planar heterojunction structure prepared using room-temperature solution processing techniques
The use of a thin layer of zinc oxide nanoparticles as an electron-transport layer allows flexible perovskite solar cells to be fabricated with a power conversion efficiency as high as 15.7%.
- Dianyi Liu
- & Timothy L. Kelly
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Article |
90-degree optical switching of output second-harmonic light in chiral photomagnet
Perpendicular photoswitching of the polarization plane of the output second-harmonic light is observed in a chiral spin-crossover assembly based on an iron-octacyanoniobate magnet. This photoswitching can be reversed by irradiating with blue or red light. It originates from alternate photoswitching between the crystallographic and magnetic contributions to second-harmonic generation.
- Shin-ichi Ohkoshi
- , Shinjiro Takano
- & Hiroko Tokoro
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News & Views |
The effect of field gradient on SERS
Surface-enhanced Raman spectroscopy is normally associated with the enhanced electric fields that arise near metal nanoparticle surfaces. The contribution of field gradients has been unclear, but new research provides insights into their effect.
- Christine M. Aikens
- , Lindsey R. Madison
- & George C. Schatz
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Letter |
Wideband dye-sensitized solar cells employing a phosphine-coordinated ruthenium sensitizer
Single and tandem dye-sensitized solar cells with high power-conversion efficiencies and large photocurrent densities are fabricated using a photosensitizer whose long wavelength absorption originates from a spin-forbidden single–triplet transition.
- Takumi Kinoshita
- , Joanne Ting Dy
- & Hiroshi Segawa
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Interview |
Photons and magnetization
Magnets are often electrically activated, but recent research has demonstrated various schemes that can control magnetization using light and photocarriers. Nature Photonics spoke to Petr Němec and Tomas Jungwirth about their recent work on a polarization-independent optical-torque approach.
- David Pile
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News & Views |
Harvesting light
Organic photovoltaics offer the tantalizing promise of low-cost plastic coatings that can be applied to building surfaces and roofing to generate electricity sustainably. Now, the demonstration that the addition of organic dyes can improve device performance by energy-transfer processes offers an exciting new opportunity.
- Paul C. Dastoor
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News & Views |
Dye lasers with a difference
Scientists have shown that Förster resonance energy transfer can be used to realize new designs of dye laser that offer improved photostability and access to new pumping and emission wavelengths.
- José M. G. Martinho
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Article |
FRET-assisted laser emission in colloidal suspensions of dye-doped latex nanoparticles
Researchers show that Förster resonance energy transfer between two different dyes makes it possible to realize an efficient and stable laser for applications in biophotonics.
- Luis Cerdán
- , Eduardo Enciso
- & Inmaculada García-Moreno
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Article |
High-efficiency inverted dithienogermole–thienopyrrolodione-based polymer solar cells
Researchers demonstrate a high-efficiency polymer solar cell whose device architecture is compatible with a large-scale roll-to-roll process. Enhanced charge collection in the inverted polymer solar cell design and certified power conversion efficiencies of around 7.4% are reported.
- Cephas E. Small
- , Song Chen
- & Franky So
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Letter |
Self-terminating diffraction gates femtosecond X-ray nanocrystallography measurements
Researchers describe a mechanism capable of compressing fast and intense X-ray pulses through the rapid loss of crystalline periodicity. It is hoped that this concept, combined with X-ray free-electron laser technology, will allow scientists to obtain structural information at atomic resolutions.
- Anton Barty
- , Carl Caleman
- & Henry N. Chapman
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News & Views |
Single-molecule light absorption
It has long been thought that the detection of individual molecules in ambient conditions via their absorption signature was out of reach. Now, three independent research groups have developed three different methods that allow such a feat.
- Johan Hofkens
- & Maarten B. J. Roeffaers
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Editorial |
A historical bond
There is plenty to be gained by bringing researchers from photonics and chemistry closer together.
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News & Views |
Optics and chemistry meet
Research into photochemical reactions is now yielding promising ways of converting solar energy into convenient forms of chemical energy that can be easily stored.
- David Pile
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