The investigation of a localized transition of poly(p-phenylenevinylene)
作者： Jihua Yang , Zonghao Huang , Yubai Bai , Dejun Wang , Yi Yin
DOI: 10.1016/S0040-6090(98)00676-2
关键词: Electric field 、 Molecular electronic transition 、 Photovoltaic effect 、 Materials science 、 Electronic structure 、 Photoelectric effect 、 Surface photovoltage 、 Thin film 、 Condensed matter physics 、 Substrate (electronics) 、 Optics
摘要: Abstract Poly( p -phenylenevinylene) thin film was prepared by spin-casting onto optically transparent ITO conduction glass substrate, and its photoelectric properties were studied with surface photovoltage spectra. A localized subgap electronic transition is found, which causes the photovoltaic response polarity opposite to that from band-to-band ( π–π *). With help of under external electric field, this assigned a valence band local state below bottom band.
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