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Updated: Jan 25, 2026

Development of Efficient OLEDs from Solution Deposition
Published on: November 4, 2022
Blended host ink for solution processing high performance phosphorescent OLEDs
Tong Lin1,2, Xue Sun1,2, Yongxu Hu3
1Printable electronics research center, Suzhou Institute of nanotech and nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, Jiangsu, P.R. China.
Abstract:
In order to solve the interface issues in solution deposition of multilayer OLED devices, a blended host concept was developed and applied to both spin-coating and inkjet printing of phosphorescent OLEDs. The blended host consists of 1,3-bis(carbazolyl)benzene (mCP) and1,3,5-tri(phenyl-2-benzimidazoly)-benzene (TPBi). Maximum current efficiency (CE) of 24.2 cd A-1 and external quantum efficiency (EQE) of 7.0% have been achieved for spin-coated device. Maximum CE and EQE of 23.0 cd A-1 and 6.7% have been achieved for inkjet printed device. The films deposited by printing and spin-casting were further researched to explore the effect of those different processing methods on device performance.
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