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Byoung Hoon Lee, In Hwan Jung, Han Young Woo, Hong-Ku Shim, Geunjin Kim and Kwanghee Lee Multi-Charged Conjugated Polyelectrolytes as a Versatile Work Function Modifier for Organic Electronic Devices Advanced Functional Materials 24

Version of Record online: 23 SEP 2013 | DOI: 10.1002/adfm.201301810

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An electron injection mechanism for conjugated polyelectrolyte (CPE) electron transport layers in organic electronic devices is demonstrated by introducing a new series of CPEs with various numbers of ionic functionalities. Energy level tuning at the CPE/metal interface can be determined directly by adjusting ion density in the CPEs. Thickness-dependent electron injection characteristics indicate that two different mechanisms must be invoked according to the CPE thickness.

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