Results 81 to 90 of about 72,519 (283)

Hot excited state management for long-lived blue phosphorescent organic light-emitting diodes

Nature Communications, 2017
Large-scale commercialization of organic light-emitting diodes is impeded by the short operational lifetime of blue emitting materials. Leeet al. show a strategy to manage the energy dissipation on molecular dissociation using dopants with high triplet ...
Jaesang Lee, Changyeong Jeong, Thilini Batagoda, Caleb Coburn, Mark E. Thompson, Stephen R. Forrest   +5 more
doaj   +1 more source

Printed Nanostructures for Organic Photovoltaic Cells and Solution‐Processed Polymer Light‐Emitting Diodes [PDF]

, 2015
We review the progress on printing‐based technologies for organic electronic devices, especially organic photovoltaic (OPV) cells and polymer light‐emitting diodes (PLEDs). First we discuss recent efforts to introduce interdigitated nanostructures on the
Aryal, Avnon, Chen, Chen, Chen, Chen, Chen, Chung, Guo, Halls, Halls, Haugeneder, He, He, He, He, Hirade, Hiramoto, Huang, Hung, Kang, Kang, Kim, Kim, Kim, Kopola, Lee, Lee, Lee, Li, Li, Luhman, Matsuo, Michels, Najafov, Park, Park, Park, Park, Pettersson, Photovoltaics, Piromreun, Sandström, Savenije, Shaw, Shin, Siemund, Small, Theander, Tseng, Watkins, Wu, Yang, Yang, Yang, Youn, Youn, Yu, Yu, Zeng, Zhou   +60 more
core   +1 more source

Trap‐Assisted Transport and Neuromorphic Plasticity in Lead‐Free 2D Perovskites PEA2SnI4

Advanced Functional Materials, EarlyView.
An artificial retina built from lead‐free layered perovskite (PEA)2SnI4 converts light input into a persistent photocurrent and sums successive flashes over time. Micro/nanocrystals integrated on electrodes act as synapse‐like pixels that perform temporal integration directly in hardware. This in‐sensor preprocessing merges detection and computation on
Ofelia Durante, Valeria Demontis, Jonas Riisnaes Karl, Lam Hoi Tung, Sebastiano De Stefano, Daniela Marongiu, Adolfo Mazzotti, Aditya Bhardwaj, Francesco Mattana, Elisa Pili, Selene Matta, Federico Paolucci, Michele Saba, Andrea Mura, Giovanni Bongiovanni, Monica F Craciun, Saverio Russo, Antonio Di Bartolomeo   +17 more
wiley   +1 more source

Electric Field‐Dependent Conductivity as Probe for Charge Carrier Delocalization and Morphology in Organic Semiconductors

Advanced Functional Materials, EarlyView.
Applying a high electric field to a doped organic semiconductor heats up the charge carrier distribution beyond the lattice temperature, enhancing conductivity. It is shown that the associated effective temperature can be used to extract the effective localization length, which is a characteristic length scale of charge transport and provides ...
Morteza Shokrani, Felix Maximilian Graf, Anton Kompatscher, Dennis Derewjanko, Martijn Kemerink   +4 more
wiley   +1 more source

End-emitting nano organic light emitting diodes (OLEDs) with directional output

Nanophotonics, 2020
We report a new strategy for the design of organic light emitting diodes (OLEDs), where nanoscale OLEDs are fabricated into a large-area periodic array with their emission propagating along the active layer and being coupled out through the end facets. A
Huang Cuiying, Zhang Yiwei, Zhang Xinping   +2 more
doaj   +1 more source

Generalized Einstein relation for disordered semiconductors - implications for device performance

, 2004
The ratio between mobility and diffusion parameters is derived for a Gaussian-like density of states. This steady-state analysis is expected to be applicable to a wide range of organic materials (polymers or small molecules) as it relies on the existence
Roichman, Yohai, Tessler, Nir
core   +1 more source

Scale-up chemical synthesis of thermally-activated delayed fluorescence emitters based on the dibenzothiophene-S,S-dioxide core [PDF]

, 2017
We report a procedure to linearly scale-up the synthesis of 2,8-bis(3,6-di-tert-butyl-9H-carbazol-9-yl)dibenzothiophene-S,S-dioxide (compound 4) and 2,8-bis(10H-phenothiazin-10-yl)dibenzothiophene-S,S-dioxide (compound 5) using Buchwald-Hartwig cross ...
Findlay, Neil, Skabara, Peter J., Vybornyi, Oleh   +2 more
core   +1 more source

Deciphering Small Molecule Diffusion Parameters Across Light Responsive Polymersome Membranes

Advanced Functional Materials, EarlyView.
Light‐responsive polymersomes bearing donor–acceptor Stenhouse adducts (DASAs) enable programmable control over small‐molecule transport across synthetic membranes. By systematically varying DASA density, an optimal functionalization regime is identified that maximizes light‐gated permeability.
Farzina Matubbar, Beyzanur Kaya, Buse Ipek, Tenzin Dorjee, Shoghik Hakobyan, Mohamed Chami, Julien E. Gautrot, Omar Rifaie‐Graham   +7 more
wiley   +1 more source

Solution processable white organic light emitting diodes [PDF]

, 2011
Projecte Final de Màster Oficial fet en col.laboració amb Universitat Autònoma de Barcelona (UAB),Universitat de Barcelona (UB)i Institut de Ciències Fotòniques (ICFO)English: We demonstrate a novel technique for fabricating fully solution processed ...
Malinkiewicz, Olga
core   +1 more source

Optical emission near a high-impedance mirror [PDF]

, 2017
Solid state light emitters rely on metallic contacts with high sheet-conductivity for effective charge injection. Unfortunately, such contacts also support surface plasmon polariton (SPP) excitations that dissipate optical energy into the metal and limit
Brongersma, Mark L., Curto, Alberto G., Engheta, Nader, Esfandyarpour, Majid, Kik, Pieter G.   +4 more
core   +3 more sources