TY - JOUR
T1 - Boron-Containing Molecules with Fluorescence-Phosphorescence Dual-Emission for Mechanochromism and Single Molecular White Light-Emitting Diodes
AU - Liu, Meiyan
AU - Hao, Hongmin
AU - Liao, Guanming
AU - Li, Chenglong
AU - Liu, Kanglei
AU - Wang, Nan
AU - Niu, Quan
AU - Yin, Xiaodong
N1 - Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/8/7
Y1 - 2023/8/7
N2 - Organic molecules with fluorescence-phosphorescence dual-emission have attracted significant attention for their potential applications in white organic light-emitting diodes (WOLEDs). Herein, donor–accepter molecules, Mes*BA-Cz and FXylBA-Cz, are designed and synthesized, and the photoluminescence of these two compounds in solid state exhibits fluorescence-phosphorescence dual-emission. Through the single crystal study, the phosphorescent emission is mainly caused by the molecular stacking in the crystalline state, which is beneficial for aggregation-induced intersystem crossing. Dual emission behavior further caused the mechanochromism of the two compounds, with emission color changed between amorphous and crystalline state. White light photoluminescence with CIE coordinates of (0.33, 0.34) is achieved by doping FXylBA-Cz in the poly (methyl methacrylate) film. Furthermore, a WOLED based on FXylBA-Cz is manufactured with CIE coordinates of (0.31, 0.33), and the external quantum efficiency (EQE) reached 0.49%.
AB - Organic molecules with fluorescence-phosphorescence dual-emission have attracted significant attention for their potential applications in white organic light-emitting diodes (WOLEDs). Herein, donor–accepter molecules, Mes*BA-Cz and FXylBA-Cz, are designed and synthesized, and the photoluminescence of these two compounds in solid state exhibits fluorescence-phosphorescence dual-emission. Through the single crystal study, the phosphorescent emission is mainly caused by the molecular stacking in the crystalline state, which is beneficial for aggregation-induced intersystem crossing. Dual emission behavior further caused the mechanochromism of the two compounds, with emission color changed between amorphous and crystalline state. White light photoluminescence with CIE coordinates of (0.33, 0.34) is achieved by doping FXylBA-Cz in the poly (methyl methacrylate) film. Furthermore, a WOLED based on FXylBA-Cz is manufactured with CIE coordinates of (0.31, 0.33), and the external quantum efficiency (EQE) reached 0.49%.
KW - fluorescence-phosphorescence dual emission
KW - mechanochromism
KW - organoboron
KW - room temperature phosphorescence
KW - single molecular white light-emitting diodes
UR - http://www.scopus.com/inward/record.url?scp=85159142351&partnerID=8YFLogxK
U2 - 10.1002/adom.202202918
DO - 10.1002/adom.202202918
M3 - Article
AN - SCOPUS:85159142351
SN - 2195-1071
VL - 11
JO - Advanced Optical Materials
JF - Advanced Optical Materials
IS - 15
M1 - 2202918
ER -