Results 41 to 50 of about 28,603 (262)

Confining donor conformation distributions for efficient thermally activated delayed fluorescence with fast spin-flipping

Nature Communications, 2023
Fast spin-flipping is the key to exploit the triplet excitons in thermally activated delayed fluorescence based organic light-emitting diodes toward high efficiency, low efficiency roll-off and long operating lifetime.
Weidong Qiu, Denghui Liu, Mengke Li, Xinyi Cai, Zijian Chen, Yanmei He, Baoyan Liang, Xiaomei Peng, Zhenyang Qiao, Jiting Chen, Wei Li, Junrong Pu, Wentao Xie, Zhiheng Wang, Deli Li, Yiyang Gan, Yihang Jiao, Qing Gu, Shi-Jian Su   +18 more
doaj   +1 more source

Unraveling the delayed fluorescence mechanism of copper(I) halide-phosphine emitters from DFT calculations

Results in Chemistry, 2023
Several copper complexes exhibiting luminescent properties have been studied. In this context, the possibility of incorporating them into the architecture of organic light-emitting diode (OLED) devices has been investigated to improve their efficiency ...
Francisca Clavería-Cádiz, Raúl Guajardo-Maturana, Álvaro Muñoz-Castro, Aleksey Kuznetsov   +3 more
doaj   +1 more source

Unveiling the photophysics of thiourea from CASPT2/CASSCF potential energy surfaces and singlet/triplet excited state molecular dynamics simulations

, 2019
This work describes the decay mechanism of photoexcited thiourea, both in gas phase and in solution, from the information inferred from the topography of the excited and ground state potential energy surfaces and mixed singlet/triplet quantum classical ...
Corral, Ines, Granucci, Giovanni, Munoz-Muriedas, Jordi, Porta, Neus Aguilera   +3 more
core   +1 more source

Theoretical Investigation of All Optical Switching by Intersystem Crossing

Applied Sciences, 2019
The dynamics of spin flips induced by the femtosecond laser are theoretically investigated in this article. The spin flips in this scenario are attributed to the intersystem crossing (ISC) described within the frame of the Rabi model.
Yuhao Zou, Haiwei Wang, Haozhe Huang, Zhihao Zeng, Kai Wang, Sicong Wang, Xiangping Li, Changsheng Xie   +7 more
doaj   +1 more source

Deciphering the unusual fluorescence in weakly coupled bis-nitro-pyrrolo[3,2-b]pyrroles

Communications Chemistry, 2020
Owing to their electron-withdrawing nature, nitro-groups are desirable in the design of electron-deficient light-sensitizing aromatic π-conjugated molecules, but most nitro-aromatics are not fluorescent. Here, the authors show how balanced donor-acceptor
Yevgen M. Poronik, Glib V. Baryshnikov, Irena Deperasińska, Eli M. Espinoza, John A. Clark, Hans Ågren, Daniel T. Gryko, Valentine I. Vullev   +7 more
doaj   +1 more source

An Approach to Developing Cyanines with Upconverted Photosensitive Efficiency Enhancement for Highly Efficient NIR Tumor Phototheranostics

Advanced Science, 2022
Upconverted reactive oxygen species (ROS) photosensitization with one‐photon excitation mode is a promising tactic to elongate the excitation wavelengths of photosensitive dyes to near‐infrared (NIR) light region without the requirement of coherent high ...
Xueze Zhao, Shan He, Weijie Chi, Xiaogang Liu, Pengzhong Chen, Wen Sun, Jianjun Du, Jiangli Fan, Xiaojun Peng   +8 more
doaj   +1 more source

Spin dynamics in the optical cycle of single nitrogen-vacancy centres in diamond

, 2010
We investigate spin-dependent decay and intersystem crossing in the optical cycle of single negatively-charged nitrogen-vacancy (NV) centres in diamond. We use spin control and pulsed optical excitation to extract both the spin-resolved lifetimes of the ...
Collins A T, de Lange G Ristè  D Dobrovitski V V Hanson R, Hannes Bernien, Jelezko F, Lucio Robledo, Neumann P, Rogers L J, Ronald Hanson, Toeno van der Sar, van der Sar T Hagemeier J Pfaff W Heeres E C Oosterkamp T H Bouwmeester D Hanson R   +9 more
core   +1 more source

Aggregation‐enhanced direct S0–Tn transitions and room‐temperature phosphorescence in gold(I)‐complex single crystals

Aggregate, 2022
The design of efficient aggregation‐induced emission materials requires an improved understanding of photophysical processes in aggregated materials.
Akihiro Ando, Kazuhisa Ozaki, Urara Shiina, Eikichi Nagao, Kyohei Hisano, Kenji Kamada, Osamu Tsutsumi   +6 more
doaj   +1 more source

Experimental and Computational Analysis of Para-Hydroxy Methylcinnamate following Photoexcitation

Molecules, 2021
Para-hydroxy methylcinnamate is part of the cinnamate family of molecules. Experimental and computational studies have suggested conflicting non-radiative decay routes after photoexcitation to its S1(ππ*) state.
Jack Dalton, Gareth W. Richings, Jack M. Woolley, Temitope T. Abiola, Scott Habershon, Vasilios G. Stavros   +5 more
doaj   +1 more source

The Effect of Purcell Cavities on the Lifetime of Thermally Activated Delayed Fluorescent Emitters

Advanced Functional Materials, EarlyView.
A pressing challenge to OLED displays and lighting is to balance high efficiency and long operational lifetime in the deep blue spectrum. The Purcell effect can reduce the triplet density and hence the probability for destructive energy‐driven triplet annihilation events that limit the OLED lifetime. Here we study of the Purcell effect on two different
Sritoma Paul, Haonan Zhao, Collin N. Muniz, Mark E. Thompson, Stephen R. Forrest   +4 more
wiley   +1 more source