Electrochemical initiation of crystallization of amorphous selenium

✍ Scribed by James E. Kuder

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 381 KB
• Volume: 29
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(84)87067-x

✦ Synopsis

Vapour deposited films of amorphous selenium on conducting tin oxide glass are stable at open circuit or positive potentials when in contact with acetonitrile containing 0.1 M tetraethylarnmonium perchlorate. At -I.1 V us see transformation to the trigonal allotrope is initiated together with the cathodic dissolution of Se. Crystallization begins at more positive potentials under irradiation by a low pressure mercury light. In contact with aqueous electrolyte, cathodic dissolution occurs without crystallization, while in contact with dimethylformamide, crystallization precedes dissolution but can be inhibited by positive potentials. A simple model is proposed to rationalize these observations.