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Journal of Photonics for Energy

Evidence for holes beyond the recombination zone and trions in the electron transport layer of organic light-emitting diodes
Author(s): Ying Chen; Min Cai; Emily Hellerich; Rui Liu; Zhengqing Gan; Ruth Shinar; Joseph Shinar
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Paper Abstract

Recent electroluminescence (EL) detected magnetic resonance and transient EL studies reveal the presence and role of holes that drift beyond the recombination zone and approach the cathode in small molecular organic light-emitting diodes (OLEDs) with specific materials and structures. In particular, these studies suggest that these holes are responsible for trion (i.e., a bipolaron stabilized by a counterpolaron on an adjacent molecule) formation in the electron transport layer, and may contribute to EL spikes observed at the end of a bias pulse. The significance of these holes to overall OLED performance is discussed.

Paper Details

Date Published: 1 January 2011
PDF: 9 pages
J. Photon. Energy. 1(1) 011017 doi: 10.1117/1.3569107
Published in: Journal of Photonics for Energy Volume 1, Issue 1
Show Author Affiliations
Ying Chen, Iowa State Univ. (United States)
Min Cai, Iowa State Univ. (United States)
Emily Hellerich, Iowa State Univ. (United States)
Rui Liu, Iowa State Univ. (United States)
Zhengqing Gan, Iowa State Univ. (United States)
Ruth Shinar, Iowa State Univ. (United States)
Joseph Shinar, Iowa State Univ. (United States)


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