TiO2를 전자수송층으로 적용하고 PMMA 절연층을 삽입한 용액공정 기반 양자점 전계 발광 소자의 활용
Solution-Processed Quantum Dot Light-Emitting Diodes with TiO2 Nanoparticles as an Electron Transport Layer and a PMMA Insulating Layer
- Resource Type
- Article
- Authors
- 김보미 / Bomi Kim; 김정호 / Jungho Kim; 김지완 / Jiwan Kim
- Source
- 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) / Journal of the Korean Institute of Electrical and Electronic Material Engineers. Jan 01, 2022 35(1):93
- Subject
- QLEDs
TiO2 sub>
PMMA
ETL
Insulating layer
- Language
- Korean
- ISSN
- 1226-7945
We report highly efficient quantum dot light-emitting diodes (QLEDs) with TiO2 nanoparticles (NPs) as an alternative electron transport layer (ETL) and poly (methyl methacrylate) (PMMA) as an insulating layer. TiO2 NPs were applied as ETLs of inverted structured QLEDs and the effect of the addition of PMMA between ETL and emission layer (EML) on device characteristics was studied in detail. A thin PMMA layer supported to make the charge balance in the EML of QLEDs due to its insulating property, which limits electron injection effectively. Green QLEDs with a PMMA layer produced the maximum luminance of 112,488 cd/㎡ and a current efficiency of 25.92 cd/A. We expect the extended application of TiO2 NPs as the electron transport layer in inverted structured QLEDs device in the near future.