Please use this identifier to cite or link to this item: https://doi.org/10.1002/adma.200700086
Title: Injection-induced de-doping in a conducting polymer during device operation: Asymmetry in the hole injection and extraction rates
Authors: Chia, P.-J. 
Chua, L.-L. 
Sivaramakrishnan, S. 
Zhuo, J.-M. 
Zhao, L.-H.
Sim, W.-S. 
Yeo, Y.-C. 
Ho, P.K.-H. 
Issue Date: 3-Dec-2007
Citation: Chia, P.-J., Chua, L.-L., Sivaramakrishnan, S., Zhuo, J.-M., Zhao, L.-H., Sim, W.-S., Yeo, Y.-C., Ho, P.K.-H. (2007-12-03). Injection-induced de-doping in a conducting polymer during device operation: Asymmetry in the hole injection and extraction rates. Advanced Materials 19 (23) : 4202-4207. ScholarBank@NUS Repository. https://doi.org/10.1002/adma.200700086
Abstract: Injection-induced De-doping in a conducting polymer, poly(3,4- ethylenedioxythiophene) (PEDT) poly(styrenesulfonic acid)(PSSH) during device operation was reported. PEDT:PSSH is strongly acidic on account of the excess PSSH, and often contaminated with ions leftover from the oxidation reaction. The hole extraction PEDT+ → PEDT0 + h+ at the negative contact occurs more readily than hole injection from the opposite contact, which builds up a transient population of PEDT+ of a lower oxidation state across the electrode gap. Electrochemistry occurs in PEDT:PSS to give gas evolution and film spalling. The value across a lateral Au electrode gap was mapped using the Raman spectroscopy to determine whether the doping level of PEDT is permanently altered. The de-doping was confirmed by Fourier Transform Infrared Spectroscopy, which shows loss of the doping-induced infrared modes.
Source Title: Advanced Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/82543
ISSN: 09359648
DOI: 10.1002/adma.200700086
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