Energy Levels in PEDOT

The absorption spectrum of PEDOTrPSS strongly depends on the PEDOT oxidation state, and this has motivated many groups to investigate this material in electrochromic devices (see Chapter 10). 

Absorption spectra of protonated oligo-ethylenedioxythiophenes dissolved in 10% AcOH/DCM and the corresponding chemical structures. (Diagram adapted from E. Reinoldi and P. Bauerle, March 2005. Personal communication with permission of the authors.) 

Relative transmission, absorption, and reflection spectra of a 190 nm thick film of CLEVIOS PH 1000 including 5% DMSO deposited on quartz substrate with a conductivity of approximate 1000 S/cm. (Data from A. Elschner, H.C. Starck Clevios GmbH. Unpublished results.) 

---