期刊
ADVANCED MATERIALS
卷 31, 期 34, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201803714
关键词
efficiency; energy transfer; fluorescence; organic light-emitting diodes; singlet excitons
类别
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [2016R1A2B3008845, 2016M3A7B4909243]
The external quantum efficiency (EQE) of organic light-emitting diodes (OLEDs) has been dramatically improved by developing highly efficient organic emitters such as phosphorescent emitters and thermally activated delayed fluorescent (TADF) emitters. However, high-EQE OLED technologies suffer from relatively poor device lifetimes in spite of their high EQEs. In particular, the short lifetimes of blue phosphorescent and TADF OLEDs remain a big hurdle to overcome. Therefore, the high-EQE approach harvesting singlet excitons of fluorescent emitters by energy transfer processes from the host or sensitizer has been explored as an alternative for high-EQE OLED strategies. Recently, there has been a big jump in the EQE and device lifetime of singlet-exciton-harvesting fluorescent OLEDs. Recent progress on the materials and device structure is discussed herein.
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