Results 111 to 120 of about 6,501 (234)

Flexible white thermally activated delayed fluorescence polymer with alkyl spacer and side‐chain encapsulation for efficient solution‐processed white organic light‐emitting diodes

FlexMat, EarlyView.
A “gemstone‐necklace” FASCE strategy synthesizes single‐component white polymers (PTF‐Qx) by alternating rigid TADF units with flexible alkyl chains. The non‐doped rigid device achieves a high EQE of 15.66% with stable white emission (CIE: 0.36, 0.46).
Wenhao Zhang, Hongyu Zhuang, Xinxin Ban, Shilong Feng, Tao Xu, Youqiang Qian, Shun Hu, Aiyun Zhu   +7 more
wiley   +1 more source

Spirobifluorene fusion in multiple resonance frameworks enables efficient pure‐red OLEDs with narrowband emission and suppressed efficiency roll‐off

FlexMat, EarlyView.
An orthogonal spirobifluorene‐fusion strategy is introduced for B/N/O‐alternated MR frameworks, enabling improved kRISC (5.46 × 103 s−1), high ΦPL (97%), and narrow‐band pure‐red emission. Vacuum‐evaporated OLEDs incorporating this emitter achieve an EQEmax >40% (FWHM = 36 nm) and exhibit exceptionally low efficiency roll‐off at high luminance ...
Yan‐Yun Jing, Han Wu, Xiaoling Xu, Sijie Xian, Jingsheng Miao, Xiaojun Yin, Chuluo Yang, Xiaosong Cao   +7 more
wiley   +1 more source

Fluorene‐based blue emitters: On the path to electrically pumped organic lasers

FlexMat, EarlyView.
Electrically pumped efficient operation remains unrealized, a major challenge in optoelectronics. Fluorene‐based blue‐emitting semiconductors are promising gain media, thanks to their structural tunability and favorable emission properties. This review summarizes recent advances, highlights their reliability and versatility in lasing, and outlines key ...
Yong Yan, Hao Li, Mengna Yu, Huiyin Wang, Jiangqiang He, Menghan Wu, Quanyou Feng, Linghai Xie   +7 more
wiley   +1 more source

Lead‐free halide perovskites for efficient light‐emitting devices

FlexMat, EarlyView.
Overview of Lead‐free metal halide perovskites with different categories and optoelectronic application directions, including solid‐state lighting, light‐emitting diodes, piezoluminescence, flexible electronics, scintillators and CPL emitters. Abstract Lead halide perovskites exhibit promising optoelectronic properties for optoelectronic applications ...
Yueqi Shen, Kefan Meng, Yiqi Zhao, Chaoran Zhou, Jiaye Shu, Di Zhang, Chengqian Cao, Wanxin Chen, Yefeng Zhou, Weihua Ning   +9 more
wiley   +1 more source

Organic Host-Guest Doped Red Room-Temperature Ultralong Afterglow Materials Based on Benzo[a]Carbazole Derivatives. [PDF]

Chemistry
Yue J, Xu Z, Ye X, Liu M, Dai W, Song Y, Lei Y, Wu H, Huang X.   +8 more
europepmc   +1 more source

Deep red to near‐infrared thermally activated delayed fluorescence conjugated polymers toward highly efficient solution‐processible deep red and near‐infrared organic light‐emitting diodes

FlexMat, EarlyView.
A series of deep red (DR) and near‐infrared (NIR) thermally activated delayed fluorescence conjugated polymers are prepared, their solution‐processible organic light‐emitting diodes exhibit DR emission with maximum external quantum efficiency (EQEmax) of 6.4%, high luminance of 4254 cd m−2 and emission peak at 678 nm, and a NIR device with EQEmax of 2 ...
Tao Wang, Hongyang Zhang, Liping Jin, Peng Tao, Yanxiang Cheng, Wai‐Yeung Wong   +5 more
wiley   +1 more source

Synthesis and Evaluation of the AhR Activity of Indolo[3,2<i>-b</i>]carbazole Derivatives. [PDF]

Molecules
Mexia N, Tsakou S, Magiatis P.
europepmc   +1 more source

Recent advances and prospects for high‐efficiency blue hot exciton organic light‐emitting diodes

FlexMat, EarlyView.
Blue organic light‐emitting diodes (OLEDs) face great challenges in achieving the balance between color purity, device efficiency, and stability. Hot exciton materials offer a solution by rapidly converting non‐emissive triplet excitons into singlet ones through a high‐lying reverse intersystem crossing process.
Xiaoen Shi, Shuyuan Ge, Futong Liu, Ping Lu   +3 more
wiley   +1 more source

<i>In situ</i> encapsulation of coumarin/fluorescent bleacher/carbazole derivatives@Eu MOF materials for white light-emitting diodes. [PDF]

RSC Adv
Liu XY, Zhou Co-Author SJ, Luan F, Wang YH, Ma XJ, Sui LY, Feng YR.   +6 more
europepmc   +1 more source

Pyridine‐dicarbonitriles acceptor engineering in multi‐resonance thermally activated delayed fluorescence with hybridized short‐ and long‐range charge transfer for high‐performance electroluminescence

FlexMat, EarlyView.
Pyridine‐dicarbonitrile units integrated into a multiple‐resonance core engineer the excited state through cooperative short‐range charge transfer (SRCT) and long‐range charge transfer (LRCT), thereby enhancing the spin‐flipping process. Abstract Multi‐resonance (MR) thermally activated delayed fluorescence (TADF) materials exhibit narrowband emission ...
Jing Sun, Zezhu Xiao, Wei Li, Songqian Ni, Haorun Dai, Xiangyun Wang, Jiasen Zhang, Weiguo Zhu, Ziyi Ge, Xiugang Wu   +9 more
wiley   +1 more source