Evidence for holes beyond the recombination zone and trions in the electron transport layer of organic light-emitting diodes

Ying Chen; Min Cai; Emily Hellerich; Rui Liu; Zhengqing Gan; Ruth Shinar; Joseph Shinar

doi:10.1117/1.3569107

1 January 2011 Evidence for holes beyond the recombination zone and trions in the electron transport layer of organic light-emitting diodes

Ying Chen, Min Cai, Emily Hellerich, Rui Liu, Zhengqing Gan, Ruth Shinar, Joseph Shinar

Author Affiliations +

Journal of Photonics for Energy, Vol. 1, Issue 1, 011017 (January 2011). https://doi.org/10.1117/1.3569107

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.

Citation Download Citation

Ying Chen, Min Cai, Emily Hellerich, Rui Liu, Zhengqing Gan, Ruth Shinar, and Joseph Shinar "Evidence for holes beyond the recombination zone and trions in the electron transport layer of organic light-emitting diodes," Journal of Photonics for Energy 1(1), 011017 (1 January 2011). https://doi.org/10.1117/1.3569107

Published: 1 January 2011

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