Effect of inorganic nanolayers on electron injection in polymer light-emitting diodes

Shanyu Quan*, Feng Teng, Zheng Xu, Dongdong Wang, Shengyi Yang, Yanbin Hou, Yongsheng Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We report the effect of inorganic nanolayers on electron injection in the polymer light-emitting diodes (PLEDs) in which a hole is the major charge carrier. The inorganic nanolayers with different dielectric constants were placed between the emitting layer and the aluminum cathode, and their influence on the device performance was investigated. The device with a nanolayer of lower dielectric constant demonstrated higher efficiency, which is significantly higher than that of one without an insulating layer. The enhancement may result from the lowering of the effective barrier height for electron injection while increasing electron-tunneling probability, which improve the balanced injection of hole and electrons.

Original languageEnglish
Pages (from-to)434-437
Number of pages4
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume352
Issue number4-5
DOIs
Publication statusPublished - 3 Apr 2006
Externally publishedYes

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