Details

Autor(en) / Beteiligte

• Ye, Wenpeng
• Ma, Huili
• Shi, Huifang
• Wang, He
• Lv, Anqi
• Bian, Lifang
• Zhang, Meng
• Ma, Chaoqun
• Ling, Kun
• Gu, Mingxing
• Mao, Yufeng
• Yao, Xiaokang
• Gao, Chaofeng
• Shen, Kang
• Jia, Wenyong
• Zhi, Jiahuan
• Cai, Suzhi
• Song, Zhicheng
• Li, Jingjie
• Zhang, Yanyun
• Lu, Song
• Liu, Kun
• Dong, Chaomin
• Wang, Qian
• Zhou, Yudong
• Yao, Wei
• Zhang, Yujian
• Zhang, Hongmei
• Zhang, Zaiyong
• Hang, Xiaochun
• An, Zhongfu
• Liu, Xiaogang
• Huang, Wei

Titel

Confining isolated chromophores for highly efficient blue phosphorescence

Ist Teil von

• Nature materials, 2021-11, Vol.20 (11), p.1539-1544

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2021

Quelle

Nature Journals

Beschreibungen/Notizen

• High-efficiency blue phosphorescence emission is essential for organic optoelectronic applications. However, synthesizing heavy-atom-free organic systems having high triplet energy levels and suppressed non-radiative transitions—key requirements for efficient blue phosphorescence—has proved difficult. Here we demonstrate a simple chemical strategy for achieving high-performance blue phosphors, based on confining isolated chromophores in ionic crystals. Formation of high-density ionic bonds between the cations of ionic crystals and the carboxylic acid groups of the chromophores leads to a segregated molecular arrangement with negligible inter-chromophore interactions. We show that tunable phosphorescence from blue to deep blue with a maximum phosphorescence efficiency of 96.5% can be achieved by varying the charged chromophores and their counterions. Moreover, these phosphorescent materials enable rapid, high-throughput data encryption, fingerprint identification and afterglow display. This work will facilitate the design of high-efficiency blue organic phosphors and extend the domain of organic phosphorescence to new applications. A strategy to confine phosphorescent organic chromophores within ionic crystals proves effective in suppressing non-radiative recombination channels and increasing the phosphorescence efficiency of blue-emitting heavy-atom-free emitters.