Electric-field-induced fluorescence quenching in X-metal-free phthalocyanine: a probe of charge carrier photogeneration

Electric-field-induced fluorescence quenching of X-metal-free phthalocyanine in polyvinylacetate is observed. The quenching dependence on electric field agrees with existing charge carrier photogeneration data. Our results indicate direct involvement of the first excited singlet state in carrier photogeneration.