Results 131 to 140 of about 292,062 (298)

The Triplet State of Indigo [PDF]

Angewandte Chemie International Edition, 2007
J Sérgio, Seixas de Melo, Hugh D, Burrows, Carlos, Serpa, Luis G, Arnaut   +3 more
openaire   +2 more sources

Degradation of Blue MR‐TADF OLEDs: Host‐dependent Effects of mCBP and MADN Revealed by Fragmentation Profiling

Advanced Optical Materials, EarlyView.
Degradation in blue MR‐TADF OLEDs originates from high triplet density caused by slow RISC. LDI‐TOF MS directly detects host‐ and emitter‐derived fragments, providing molecular insight into how triplet accumulation drives degradation in the emissive layer. ABSTRACT Blue organic light‐emitting diodes (OLEDs) employing multi‐resonance thermally activated
Min Gyu Jun, Jeong Won Seo, Jong‐Am Hong, Kyu‐Myung Lee, Yongsup Park, Min Chul Suh   +5 more
wiley   +1 more source

Aggregation‐induced circularly polarized luminescence and delayed fluorescence enabled by activating high‐level reverse intersystem crossing

Aggregate
Circularly polarized luminescence (CPL) materials with delayed fluorescence have attracted much attention due to their ability to efficiently trap triplet state excitons, thereby improving the photoluminescence quantum yields of CPL materials.
Ke Wang, Xinwen Ou, Xiaofei Niu, Zhenghao Wang, Fengyan Song, Xiaobin Dong, Wu‐jie Guo, Hui‐Qing Peng, Zujin Zhao, Jacky W. Y. Lam, Jianwei Sun, Hongkai Wu, Shu‐Yan Yu, Fei Li, Ben Zhong Tang   +14 more
doaj   +1 more source

Metal‐Metal‐π Interaction: A Pathway to Construct Organic–Inorganic Excited‐State and Supramolecular Assembly

Advanced Optical Materials, EarlyView.
An organic–inorganic mixed excited state is designed and demonstrated by combining the metal–metal and π–π interactions within a supramolecular Pt2–pyrene assembly. Directional orbital overlap between the Pt and carbon atoms gives rise to a long‐lived triplet emission, strong emission polarization, exciton–exciton annihilation, and efficient exciton ...
Ying Luo, Yangbo Zhang, Ning Zhou, Xiong Wang, Ying‐Fan Tan, Wenjie Zou, Wei Lu, Qingyun Wan   +7 more
wiley   +1 more source

EPR of Photoexcited Triplet-State Acceptor Porphyrins. [PDF]

J Phys Chem C Nanomater Interfaces, 2021
Redman AJ, Moise G, Richert S, Viere EJ, Myers WK, Therien MJ, Timmel CR.   +6 more
europepmc   +1 more source

Structural Modulation of Charge Transfer in Donor–Acceptor Systems: Effects of Donor Type and Connectivity

Advanced Optical Materials, EarlyView.
A coherent phthalimide acceptor platform with planar (Cz—carbazole) and spiro‐type (SAF—spiroacridine fluorene) donors enables systematic tuning of donor geometry and coupling, driving the evolution of excited‐state topology from classical CT‐TADF and fluorescence/RTP to CT‐driven and LE‐assisted TADF with OLED efficiencies ≈ 36%.
Christopher Anton Wallerius, Robert Herzhoff, Soyoung Boo, Andreas Mischok, Dirk Hertel, Jörg‐Martin Neudörfl, Daniele Fazzi, Malte C. Gather, Klaus Meerholz   +8 more
wiley   +1 more source

Cathodoluminescence spectroscopy of triplet excitons in organic emitters

Nano Express
Singlet and triplet excited-state energies are fundamental to a variety of processes and applications of organic semiconductors, such as singlet fission, triplet–triplet annihilation, and thermally activated delayed fluorescence.
B G Mendis, S Marinoni, A Danos, A P Monkman   +3 more
doaj   +1 more source

Synthesis and Characterization of Zn-Salophen Complexes with Different D–A Distances: An Approach to Tuning the Intersystem-Crossing Process

Inorganics
A series of novel zinc-salophen (salophen = N, N′-phenylenebis(salicylimine)) complexes (Zn-1–4) with electron donor–acceptor (D–A) structure were synthesized and characterized using a triphenylamine structure as the electron donor. Zn-salophen complexes
Ze-Hao Li, Zi-Yi Tang, Jing Zhang, Jun-Long Zhang   +3 more
doaj   +1 more source

Establishing PQ-ERA photoclick reactions with unprecedented efficiency by engineering of the nature of the phenanthraquinone triplet state. [PDF]

Chem Sci, 2023
Fu Y, Alachouzos G, Simeth NA, Di Donato M, Hilbers MF, Buma WJ, Szymanski W, Feringa BL.   +7 more
europepmc   +1 more source

Intramolecular FRET Cascades Enable Small Efficiency Roll‐Off in Solution‐Processed OLEDs

Advanced Optical Materials, EarlyView.
This work highlights how an intramolecular FRET design strategy in solution‐processable MR‐TADF emitters enables narrowband emission, high PLQY, and efficient exciton harvesting. The resulting hyperfluorescent solution‐processed OLEDs reach up to 20.7% EQEmax with minimal efficiency roll‐off even at 10 000 cd m−2, demonstrating strong potential for ...
Mahni Fatahi, Debasish Barman, Youichi Tsuchiya, Chihaya Adachi, Eli Zysman‐Colman   +4 more
wiley   +1 more source