Abstract
Transient bleaching currents are examined for a series of electrochromic carbazole-modified polysiloxane thin films. The shape of the bleaching currents is found to be sensitive to the type of counter-ion employed and the initial density of counter-ion charge that is deposited in the films during the colouration stage. Pure space-charge-limited (SCL) transport of counter-ions that posses a well-defined mobility is inconsistent with the observed pulse shapes and a modified SCL model that involves fast and slow mobility sites is proposed. The modified SCL model may describe a variety of transient bleaching pulse shapes (including current overshoots) as charge is removed from the electrochromic films and the counter-ions are constrained to transfer from slow to fast discharge sites.
| Original language | English |
|---|---|
| Pages (from-to) | 1818-1824 |
| Number of pages | 7 |
| Journal | Journal of Materials Science |
| Volume | 43 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Mar 2008 |
Keywords
- CARBAZOLE MODIFIED POLYSILOXANES
- DISPLAYS
- WO3
- DEVICES
- ISSUES
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