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38‐4: The Interfacial Effect between HTL and EML on the Efficiency of Solution Processed Green Phosphorescent OLEDs
Author(s) -
Kang Pil-Gu,
Shin Dong Heon,
Na HongYeop,
Doh YooJin,
John Kramer,
Liam Spencer,
Suh Min Chul
Publication year - 2016
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.10717
Subject(s) - oled , materials science , phosphorescence , layer (electronics) , optoelectronics , diode , process (computing) , nanotechnology , computer science , optics , physics , fluorescence , operating system
We have fabricated highly efficient green phosphorescent organic light‐emitting diodes by solution process. Very interestingly, we found that the device efficiency is affected by interface between hole transport layer (HTL) and emission layer (EML). It was proved through spin cleaning process of cross‐linkable HTL after curing which may affect the interface mixing. In addition, we tried to add complement layer to manipulate such effects. As a result, we significantly improved device efficiency (up to 72.7 cd/A) after spin cleaning process of the cross‐linkable HTL material.