Dissociation of electron–hole pairs interacting with triplet excitons in amorphous molecular semiconductors

✍ Scribed by N. A. Davidenko; N. G. Kuvshinsky

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 150 KB
• Volume: 7
• Category: Article
• ISSN: 1616-301X
• DOI: 10.1002/(sici)1099-0712(199709)7:5<255::aid-amo316>3.0.co;2-w

✦ Synopsis

The photoconductivity of films of amorphous molecular semiconductors increases upon simultaneous photogeneration of singlet electron-hole pairs (EHPs) and triplet excitons and decreases upon photogeneration of triplet EHPs and triplet excitons. An increase in external electric field strength leads to a decrease in the effect of triplet excitons on the film photoconductivity caused by EHP dissociation. It is concluded that under increasing external electric field strength the mobility of charge carriers increases and the velocity of EHP dissociation becomes comparable with the velocity of spin conversion of EHPs interacting with triplet excitons. *