High-Performance Green OLEDs Using Thermally Activated Delayed Fluorescence with a Power Efficiency of over 100 lm W(-1)

Yuki Seino; Susumu Inomata; Hisahiro Sasabe; Yong-Jin Pu; Junji Kido

doi:10.1002/adma.201503782

High-Performance Green OLEDs Using Thermally Activated Delayed Fluorescence with a Power Efficiency of over 100 lm W(-1)

Adv Mater. 2016 Apr 6;28(13):2638-43. doi: 10.1002/adma.201503782. Epub 2016 Feb 2.

Authors

Yuki Seino^{1

2}, Susumu Inomata^{1

2}, Hisahiro Sasabe^{1

2}, Yong-Jin Pu^{1

2}, Junji Kido^{1

2}

Affiliations

¹ Department of Organic Device Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.
² Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.

PMID: 26833580
DOI: 10.1002/adma.201503782

Abstract

A green organic light-emitting device (OLED) with an extremely high power efficiency of over 100 lm W(-1) is realized through energy transfer from an exciplex. An optimized OLED showed a maximum external efficiency of 25.7%, and a power efficiency of 79.4 lm W(-1) at 1000 cd m(-2) , which is 1.6-times higher than that of state-of-the-art green thermally activated delayed fluorescence (TADF) OLEDs.

Keywords: energy transfer; exciplex; organic light-emitting devices; thermally activated delayed fluorescence.