An excited state managing molecular design platform of blue thermally activated delayed fluorescence emitters by π-linker engineering

Autor:	Kyung Hyung Lee, Yeon Sook Chung, Eun-Kyung Lee, Myungsun Sim, Hasup Lee, Eun Suk Kwon, Soon Ok Jeon, Hyeonho Choi, Jun Yeob Lee, Numata Masaki
Rok vydání:	2020
Předmět:	Materials science business.industry General Chemistry Fluorescence Acceptor Excited state Materials Chemistry OLED Molecule Optoelectronics Quantum efficiency business Linker Diode
Zdroj:	Journal of Materials Chemistry C. 8:1736-1745
ISSN:	2050-7534 2050-7526
DOI:	10.1039/c9tc05550a
Popis:	A molecular design platform of blue thermally activated delayed fluorescence (TADF) emitters to boost the external quantum efficiency and efficiency roll-off of blue TADF organic light-emitting diodes (OLEDs) was developed. A molecular structure hiring one or two excited state controlling subunits in the π-linker between a donor and an acceptor was employed. The subunit in the π-linker was a phenyl unit to precisely control the performances of TADF devices. It was described that the phenyl subunit simultaneously improved the external quantum efficiency and efficiency roll-off of TADF OLEDs. A high external quantum efficiency of 28.5% was demonstrated using the material design having two phenyl sub units.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::49abb72c8ada0c80ca965df65f522958 https://doi.org/10.1039/c9tc05550a Zobrazit plný text záznamu