Li-li Qu, Ying-hui Wang, Zhi-hui Kang, Yu-guang Ma, Han-zhuang Zhang. Investigation on Excited-State Photophysical Characteristics of Low Bandgap Polymer APFO3 (cited: 1)[J]. Chinese Journal of Chemical Physics , 2014, 27(1): 109-114. doi: 10.1063/1674-0068/27/01/109-114
Citation: Li-li Qu, Ying-hui Wang, Zhi-hui Kang, Yu-guang Ma, Han-zhuang Zhang. Investigation on Excited-State Photophysical Characteristics of Low Bandgap Polymer APFO3 (cited: 1)[J]. Chinese Journal of Chemical Physics , 2014, 27(1): 109-114. doi: 10.1063/1674-0068/27/01/109-114

Investigation on Excited-State Photophysical Characteristics of Low Bandgap Polymer APFO3 (cited: 1)

doi: 10.1063/1674-0068/27/01/109-114
  • Received Date: 2013-06-25
  • The excited state photophysics of low bandgap polymer APFO3 has been investigated in detail. The chemical calculations confirm that the intrachain charge transfer (ICT) may occur after photo-excitation and is mainly responsible for the first absorption band. The transient absorption results confirm that ICT indeed exists and competes with the vibra-tional relaxation at the same time, when APFO3 is in a monodisperse system. This ICT process would disappear due to the influence of interchain interaction when APFO3 is in the condensed phase, where the exciton decay would be dominant in the relaxation process after photoexcitation. The photoexcitation dynamics of APFO3 film blending with PC61BM are presented, which shows that the exciton may be dissociated completely as the percentage of PC61BM reaches ~50%. Meanwhile, the photovoltaic performance based on blend het-erojunction shows that the increase of photocurrent is little if the percentage of PC61BM exceeds ~50%. Overall, the present study has covered several fundamental processes taking place in the APFO3 polymer.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Investigation on Excited-State Photophysical Characteristics of Low Bandgap Polymer APFO3 (cited: 1)

doi: 10.1063/1674-0068/27/01/109-114

Abstract: The excited state photophysics of low bandgap polymer APFO3 has been investigated in detail. The chemical calculations confirm that the intrachain charge transfer (ICT) may occur after photo-excitation and is mainly responsible for the first absorption band. The transient absorption results confirm that ICT indeed exists and competes with the vibra-tional relaxation at the same time, when APFO3 is in a monodisperse system. This ICT process would disappear due to the influence of interchain interaction when APFO3 is in the condensed phase, where the exciton decay would be dominant in the relaxation process after photoexcitation. The photoexcitation dynamics of APFO3 film blending with PC61BM are presented, which shows that the exciton may be dissociated completely as the percentage of PC61BM reaches ~50%. Meanwhile, the photovoltaic performance based on blend het-erojunction shows that the increase of photocurrent is little if the percentage of PC61BM exceeds ~50%. Overall, the present study has covered several fundamental processes taking place in the APFO3 polymer.

Li-li Qu, Ying-hui Wang, Zhi-hui Kang, Yu-guang Ma, Han-zhuang Zhang. Investigation on Excited-State Photophysical Characteristics of Low Bandgap Polymer APFO3 (cited: 1)[J]. Chinese Journal of Chemical Physics , 2014, 27(1): 109-114. doi: 10.1063/1674-0068/27/01/109-114
Citation: Li-li Qu, Ying-hui Wang, Zhi-hui Kang, Yu-guang Ma, Han-zhuang Zhang. Investigation on Excited-State Photophysical Characteristics of Low Bandgap Polymer APFO3 (cited: 1)[J]. Chinese Journal of Chemical Physics , 2014, 27(1): 109-114. doi: 10.1063/1674-0068/27/01/109-114

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