当前位置: X-MOL 学术Nat. Photon. › 论文详情
Overcoming the energy gap law in near-infrared OLEDs by exciton–vibration decoupling
Nature Photonics ( IF 31.241 ) Pub Date : 2020-06-29 , DOI: 10.1038/s41566-020-0653-6
Yu-Chen Wei; Sheng Fu Wang; Yun Hu; Liang-Sheng Liao; Deng-Gao Chen; Kai-Hsin Chang; Chi-Wei Wang; Shih-Hung Liu; Wei-Hsiang Chan; Jia-Ling Liao; Wen-Yi Hung; Tsai-Hui Wang; Po-Ting Chen; Hsiu-Fu Hsu; Yun Chi; Pi-Tai Chou

The development of high-performance near-infrared organic light-emitting diodes is hindered by strong non-radiative processes as governed by the energy gap law. Here, we show that exciton delocalization, which serves to decouple the exciton band from highly vibrational ladders in the S0 ground state, can bring substantial enhancements in the photoluminescence quantum yield of emitters, bypassing the energy gap law. Experimental proof is provided by the design and synthesis of a series of new Pt(ii) complexes with a delocalization length of 5–9 molecules that emit at 866–960 nm with a photoluminescence quantum yield of 5–12% in solid films. The corresponding near-infrared organic light-emitting diodes emit light with a 930 nm peak wavelength and a high external quantum efficiency up to 2.14% and a radiance of 41.6 W sr−1 m−2. Both theoretical and experimental results confirm the exciton–vibration decoupling strategy, which should be broadly applicable to other well-aligned molecular solids.
更新日期:2020-06-29

 

全部期刊列表>>
材料学研究精选
Springer Nature Live 产业与创新线上学术论坛
胸腔和胸部成像专题
自然科研论文编辑服务
ACS ES&T Engineering
ACS ES&T Water
屿渡论文,编辑服务
杨超勇
周一歌
华东师范大学
段炼
清华大学
中科大
唐勇
跟Nature、Science文章学绘图
隐藏1h前已浏览文章
中洪博元
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
x-mol收录
福州大学
南京大学
王杰
左智伟
电子显微学
何凤
洛杉矶分校
吴杰
赵延川
试剂库存
天合科研
down
wechat
bug