1 January 2011 Evidence for holes beyond the recombination zone and trions in the electron transport layer of organic light-emitting diodes
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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.
© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)
Ying Chen, Ying Chen, Min Cai, Min Cai, Emily Hellerich, Emily Hellerich, Rui Liu, Rui Liu, Zhengqing Gan, Zhengqing Gan, Ruth Shinar, Ruth Shinar, Joseph Shinar, 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 . Submission:
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