Mechanism of charge generation in p -type doped layer in the connection unit of tandem-type organic light-emitting devices

X. D. Gao, J. Zhou, Z. T. Xie, B. F. Ding, Y. C. Qian, X. M. Ding, X. Y. Hou

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

A p -type doped organic layer combined with a hole-blocking layer has been experimentally demonstrated to serve as the charge generation unit in tandem-type organic light-emitting devices. The p -type layer functions as the source of both holes and electrons. Charge separation is explained by the tunneling model that the hole-blocking layer reduces the energy barrier for the electrons generated in the p -type layer to tunnel through into one light-emitting unit, while the holes generated in the p -type layer can transport to the other light-emitting unit easily under operation voltage.

Original languageEnglish
Article number083304
JournalApplied Physics Letters
Volume93
Issue number8
DOIs
StatePublished - 2008
Externally publishedYes

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