Achieving High‐Temperature Phosphorescence by Organic Cocrystal Engineering

• DOI: 10.1002/ange.202319694
• Publication Date: 2024-02-07T08:05:13Z
• Authors: Manjeet Singh; Kang Shen; Wenpeng Ye; Yanhua Gao; Anqi Lv; Kun Liu; Huili Ma; Zhengong Meng; Huifang Shi; Zhongfu An
• Keywords: Cocrystal; Crystal Engineering; Molecular engineering

Abstract Organic phosphors offer a promising alternative in optoelectronics, but their temperature‐sensitive feature has restricted applications high‐temperature scenarios, and the attainment of phosphorescence (HTP) is still challenging. Herein, series organic cocrystal are constructed by supramolecular assembly with an ultralong emission lifetime up to 2.16 s. Intriguingly, remarkable stabilization triplet excitons can also be realized at elevated temperature, green exhibited solid state even 150 °C. From special molecular packing within crystal lattice, it been observed that orientation isolated water cluster well‐controlled organization via multiple interactions favor structural rigidity cocrystals more effectively suppress nonradiative transition, thus resulting efficient room‐temperature unprecedented survival HTP.