Atmosphere sensitive photoconductivity of C60 thin films prepared in high vacuum

Abstract

Listen

Translate article

It has been found that C60 thin films prepared by vapor deposition in high vacuum and measured in situ without exposure to air exhibit a high photocarrier generation quantum efficiency in excess of 50%. The photocurrent and dark current, however, decrease dramatically on the introduction of oxygen into a sample chamber, indicating very high sensitivity of C60's electrical properties to oxygen, the cause of which can be ascribed to carrier trapping or excited state quenching by oxygen.