Wide-bandgap organic nanocrystals with high mobility and tunable lasing emission

Yin Xiang Li, Wei Liu, Meng Na Yu, Xue Mei Dong, Chang Jin Ou, Mustafa Eginligil, Rui Qing Li, Xin Wen Zhang, Yi Jie Nie, Ling Hai Xie, Chun Xiang Xu, Ju Qing Liu, Wei Huang

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Here, a wide-bandgap organic nanocrystal is constructed from a steric-functionalized difluorene-based organic semiconductor material 2,2′-bi(9,9′-dimethylfluorene) (BMeF). The synthetic nanocrystal presents superior photoelectric integrated properties, with crystallization-enhanced emission and absolute photoluminescence quantum yield (PLQY) up to 75%, high mobility (0.18 cm2V−1s−1), and low threshold dual-color lasing behavior from ultraviolet (392 nm) to deep-blue (415 nm). Moreover, organic light-emitting diodes (OLEDs) based on BMeF nanocrystals show deep-blue emission with a brightness of 1152 cd m−2and turn-on voltage of 2.8 V. This work opens an avenue for high-performance wide-bandgap organic nanocrystals capable of outstanding shortwave emission and high charge mobility.

Original languageEnglish
Pages (from-to)3171-3176
Number of pages6
JournalJournal of Materials Chemistry C
Volume9
Issue number9
DOIs
StatePublished - 7 Mar 2021

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