Strategy of Modulating Nonradiative Decay for Approaching Efficient Thermally Activated Delayed Fluorescent Emitters DOI Creative Commons
Jian Lei, Che‐Wei Chang,

Yi-Kuan Chen

et al.

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(38), P. 16189 - 16198

Published: Sept. 12, 2024

Language: Английский

Rational Molecular Design for Boosting Afterglow Efficiency in Nonplanar Carbazolocarbazoles DOI Creative Commons

Po-Cheng Liu,

Jian Lei,

Cheng-Chan Liu

et al.

JACS Au, Journal Year: 2025, Volume and Issue: 5(2), P. 756 - 765

Published: Jan. 23, 2025

Carbazolocarbazole (CCz) represents a novel class of heterocycles in the carbazole family, distinguished by its unique structure and related properties. However, significant challenges associated with synthesis have constrained exploration studies recent years. Herein, we presented thorough reproducible method for synthesizing gram-sized helical CCz, extending functionalization to investigate both pristine CCz six derivatives various substituents. This work is debut compounds displaying afterglow characteristics solid state. The demonstrated impressive ultralong room-temperature phosphorescence (URTP) lifetimes, ranging from 0.52 0.72 s, which are considered relatively long among family. URTP series occurs due efficient intersystem crossing (ISC) process singlet triplet-excited states, facilitated enhanced spin–orbit coupling (SOC). Based on comprehensive investigation seven compounds, proposed strategy elevating photoluminescence quantum yield (PLQY) organic emitters. Notably, most rigid derivatives, SpiroCCz, exhibited highest total PLQY 79.9%, one carbazole-based emitters polymer matrix. Overall, innovative promising candidates applications optoelectronic devices, bioimaging, security printing.

Language: Английский

Citations

2
Modulatory Spin-Flip of Triplet Excitons via Diversiform Electron-Donating Units for MR-TADF Emitters towards Solution-Processed Narrowband OLEDs DOI Creative Commons
Shengyu Li, Zhi Yang,

Yanchao Xie

et al.

Chemical Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Exciton dynamics modulated by long-range charge transfer and heavy-atom effects are systematically investigated via diversiform donors for multiple resonance compounds, thus high-efficiency narrowband solution-processed OLEDs can be achieved.

Language: Английский

Citations

3
Strategy of Modulating Nonradiative Decay for Approaching Efficient Thermally Activated Delayed Fluorescent Emitters DOI Creative Commons
Jian Lei, Che‐Wei Chang,

Yi-Kuan Chen

et al.

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(38), P. 16189 - 16198

Published: Sept. 12, 2024

Language: Английский

Citations

2