Effect of residual solvent on Ru(bpy)3(ClO4)2-based light-emitting electrochemical cells

Content Provider	Semantic Scholar
Author	Zhao, Wei Liu, Chong-Yang Wang, Qi White, Jonathan Michael Bard, Allen J.
Copyright Year	2005
Abstract	The effect of residual water (H2O) and acetonitrile (MeCN) on the performance of tris(2,2'-bipyridine)ruthenium(II) perchlorate (Ru(bpy)3(ClO4)2)-based light-emitting electrochemical cells (LECs) was investigated by treating and operating the cells under high-vacuum conditions. The results show that treating the Ru(bpy)3(ClO4)2 film in a conventional vacuum oven (50−100 mTorr) at 125 °C for 48 h is not enough to dry the films. Simply leaving the film in a high vacuum (2 × 10-7 Torr) for 12 h raised the turn-on voltage to 2.6 V from 2.1 V and improved the device stability. After further drying of the film in an ultrahigh vacuum (UHV) chamber (6 × 10-10 Torr) at 143 °C for 4 h, the film still released H2O and MeCN. When the film was baked in UHV for 24 h, the turn-on voltage rose to 6.1 V and the device was further stabilized. As indicated earlier, solvent increases the mobility of the anions and, thus, facilitates the formation of a double layer at the electrode interfaces. When the film was dried in UHV, .
Starting Page	6403
Ending Page	6406
Page Count	4
File Format	PDF HTM / HTML
DOI	10.1021/cm050375p
Volume Number	17
Alternate Webpage(s)	http://bard.cm.utexas.edu/resources/Bard-Reprint/776.pdf
Alternate Webpage(s)	https://doi.org/10.1021/cm050375p
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article