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P‐172: Novel Sterically Bulky Hole‐Transporters Realizing Enhanced Operation Lifetime in TADF OLEDs
Author(s) -
Sasabe Hisahiro,
Kamata Takahiro,
Ito Nozomi,
Igarashi Masahiro,
Kido Junji
Publication year - 2019
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.13329
Subject(s) - oled , steric effects , luminance , quantum efficiency , materials science , optoelectronics , transporter , chemistry , physics , optics , stereochemistry , nanotechnology , biochemistry , layer (electronics) , gene
We developed a series of sterically bulky hexaphenylbenzene‐based hole‐transporters named 4DBTHPB and 4DBFHPB with deep I p of –5.8 eV and high E T of 2.7 eV. By using 4DBFHPB as a hole‐transporter, we realized a highly efficient and stable green TADF OLED exhibiting maximum external quantum efficiency of 19.4 % and operation lifetime at 50 % (LT 50 ) of approximately 24,000 hrs at an initial luminance of 1000 cd m –2 . Further, we investigated the effect of these hole‐transporters in sky‐blue TADF OLEDs.
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