Organic Light-Emitting Diodes with Low Turn-On Voltages and Improved Stability Featuring a PTCDI-C13:CuPc Mixed Hole Injection Layer
- Authors
- Yun, Won Min; Jang, Jaeyoung; Nam, Sooji; Park, Chan Eon; Kim, Se Hyun; Chung, Dae Sung
- Issue Date
- Aug-2014
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Organic Light Emitting Diode; Hole Injection Layer; Turn on Voltage; Stability; PTCDI
- Citation
- SCIENCE OF ADVANCED MATERIALS, v.6, no.8, pp.1676 - 1680
- Indexed
- SCIE
SCOPUS
- Journal Title
- SCIENCE OF ADVANCED MATERIALS
- Volume
- 6
- Number
- 8
- Start Page
- 1676
- End Page
- 1680
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/159309
- DOI
- 10.1166/sam.2014.1940
- ISSN
- 1947-2935
- Abstract
- We report herein that a mixed layer of the electron-donating copper phthalocyanine (CuPc) and electron-accepting N,N'-ditridecyl perylene diimide #PTCDI-C13# can be an efficient hole injection layer #HIL# for high-performance organic light-emitting diodes #OLEDs#. From photophysical, morphological, and structural studies combined with electrical analysis based on the Mott-Schottky model, we conclude that the excellent miscibility between CuPc and PTCDI-C13 enables highly efficient charge transfer, and thus effective p-doping of CuPc, leading to increased hole conductivity of the HIL. As a result, turn-on voltages as low as 2.45 V and greatly improved thermal stabilities as compared to those of OLEDs with conventional CuPc HILs are observed.
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