A Photoacoustic Study of Light-Induced Degradation of Layered Organic Photoconductors

The influence of prolonged illumination on photocarrier generation in layered organic photoconductors was studied using photoacoustic spectroscopy. Prolonged light exposure under an applied electric field decreases the photoacoustic (PA) signal and increases the photocarrier generation efficiency. W...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1989-01, Vol.28 (S1), p.240
Main Authors: Kanemitsu, Yoshihiko, Imamura, Shunji
Format: Article
Language:English
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Summary:The influence of prolonged illumination on photocarrier generation in layered organic photoconductors was studied using photoacoustic spectroscopy. Prolonged light exposure under an applied electric field decreases the photoacoustic (PA) signal and increases the photocarrier generation efficiency. When the applied field is off, the PA signal reverts to the initial value very slowly. The increase in the photogeneration efficiency and the slow recovery of the PA signal are caused by space charge due to the trapping of photocarriers. The internal electric field due to space charge was evaluated using photoacoustic spectroscopy.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAPS.28S1.240