Results 81 to 90 of about 21,084 (341)

Uncovering the Origin of Efficiency Roll‐Off in TADF OLEDs

Advanced Functional Materials, EarlyView.
OLEDs based on thermally activated delayed fluorescent (TADF) materials often suffer from a severe drop in efficiency at high brightness levels. This work presents a technique to uncover the source of this efficiency drop, and quantifies the exciton‐exciton and exciton‐polaron annihilation processes responsible for efficiency losses in our TADF OLEDs ...
Liam G. King, Kou Yoshida, Arvydas Ruseckas, Ifor D. W. Samuel   +3 more
wiley   +1 more source

Onion-like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light-emitting diodes

Nature Communications
Carbon quantum dots are emerging as promising nanomaterials for next-generation displays. The elaborate structural design is crucial for achieving thermally activated delayed fluorescence, particularly for improving external quantum efficiency of ...
Yuxin Shi, Yang Zhang, Zhibin Wang, Ting Yuan, Ting Meng, Yunchao Li, Xiaohong Li, Fanglong Yuan, Zhan’ao Tan, Louzhen Fan   +9 more
doaj   +1 more source

A new approach exploiting thermally activated delayed fluorescence molecules to optimize solar thermal energy storage

Nature Communications, 2022
Direct conversion of solar energy to stored chemical energy can be achieved through photoisomerization. Here, authors exploit thermally activated delayed fluorescence materials as a photosensitizer and signal transducer to harness solar energy, to ...
Fan-Yi Meng, I-Han Chen, Jiun-Yi Shen, Kai-Hsin Chang, Tai-Che Chou, Yi-An Chen, Yi-Ting Chen, Chi-Lin Chen, Pi-Tai Chou   +8 more
doaj   +1 more source

Threshold behavior in metastable dissociation of multi-photon ionized thymine and uracil [PDF]

, 2017
Microsecond-timescale HNCO loss has been observed from single-color multi-photon ionized pyrimidine nucleobases in the gas phase. Photon energy thresholds for the metastable channels have been measured at 5.55 ± 0.02 eV for thymine and 5.57 ± 0.02 eV for
da Fonseca Cunha, T., Dampc, M., Eden, S., Lalande, M., Limão-Vieira, P., Mason, N.J., Pandey, R., Poully, J.C., Ryszka, M.   +8 more
core   +4 more sources

A novel DR/NIR T-shaped aiegen: Synthesis and x-ray crystal structure study [PDF]

, 2020
We developed a new benzodifuran derivative as the condensation product between 2,6-diamino-4-(4-nitrophenyl)benzo[1,2-b:4,5-b’]difuran-3,7-dicarboxylate and 3-hydroxy-2-naphthaldehyde.
Bakayoko, G., Caruso, U., Di Costanzo, L., Diana, R., Panunzi, B.   +4 more
core   +1 more source

Photon Avalanching Nanoparticles: The Next Generation of Upconverting Nanomaterials?

Advanced Functional Materials, EarlyView.
This Perspective outlines the mechanistic foundations that enable photon‐avalanche (PA) behavior in lanthanide nanomaterials and contrasts them with emerging application spaces and forward‐looking design strategies. By bridging threshold engineering, energy‐transfer dynamics, and materials engineering, we provide a coherent roadmap for advancing the ...
Kimoon Lee, Yunseo Kim, Hyeong‐ku Jo, Dongjoon Yoon, Byeonghyeok Im, WonJeong Yu, Eui‐Rim On, Changhwan Lee   +7 more
wiley   +1 more source

Long-lived efficient delayed fluorescence organic light-emitting diodes using n-type hosts

Nature Communications, 2017
OLEDs based on thermally activated delayed fluorescence have shown high fluorescence efficiency but poor lifetime. Herein, Cui et al. demonstrate that the use of n-type host molecules can increase the device lifetime by 30 times and 1000 times for green ...
Lin-Song Cui, Shi-Bin Ruan, Fatima Bencheikh, Ryo Nagata, Lei Zhang, Ko Inada, Hajime Nakanotani, Liang-Sheng Liao, Chihaya Adachi   +8 more
doaj   +1 more source

The effect of deuteriation on the emission lifetime of inorganic compounds [PDF]

, 2001
The application of deuteriation of both ligands and solvents on the photophysical properties of transition metal complexes in solution and glassy matrices is reviewed.
Browne, Wesley R., Vos, Johannes G.
core   +4 more sources

Narrowband Emissive Thermally Activated Delayed Fluorescence Materials (Advanced Optical Materials 22/2022) [PDF]

, 2022
Hyung Jong Kim, Takuma Yasuda
openalex   +1 more source

Halide‐Dependent Photoluminescence and Heavy‐Atom Effects in Low‐Melting Organic–Inorganic Manganese Halides

Advanced Functional Materials, EarlyView.
Two pyridinium‐based ionic liquid templated hybrid manganese halides, (C4Py)2[MnCl4] and (C4Py)2[MnBr4], display similar bulk structures but show significantly different photoluminescence behaviors due to the bromine heavy‐atom effect. Their stable local Mn environments remain intact even in the molten state, allowing applications such as luminescence ...
Biswajit Bhattacharyya, Christian Balischewski, Jiyong Kim, Tiago Duarte, Lianshe Fu, Rute A.S. Ferreira, Alkit Beqiraj, Iuliia Mikulska, Diego Gianolio, Eric Sperlich, Felix Stete, Wouter Koopman, Christina Günter, Katlen Brennenstuhl, Daniel Van Opdenbosch, Cordt Zollfrank, Armin Wedel, Beth J. Murray, Małgorzata Swadźba‐Kwaśny, Tillmann Klamroth, Michael U. Kumke, Verónica de Zea Bermudez, Andreas Taubert   +22 more
wiley   +1 more source