2017/02/15 by Xixiang Zhu, Zhu, Xixiang, Kai Wang +16
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Machine Learning in Materials Science #Materials Science (cond-mat.mtrl-sci) #Organic Electronics and Photovoltaics #Silicon and Solar Cell Technologies #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1702.04484
openalex publication_date 2017/02/15 · arxiv created 2017/06/27 · arxiv updated 2017/06/28 · openalex created_date 2022/09/30 · openalex updated_date 2026/07/28
Organic semiconductors possess an intrinsic energetic disorder characteristic, which holds an exceptionally important role for understanding organic photovoltaic (OPV) operation and future optimization. We performed illumination intensity dependence of capacitance-voltage (C-V) measurements in PIDTDTQx:PC70BM based organic bulk heterojunction (BHJ) photovoltaics in working conditions. Energetic disorder profiles for the photo-active layer, PIDTDTQx:PC70BM, changed significantly when different interfaces were involved. The effects of energetic disorder that could be reflected from C-V profiles are incorporated through an exponential or Gaussian model of density of states (DOS), or a combination of these two. Results underlie that an identical organic blend in BHJ solar cells exhibits different energetic disorder when it interacts with various interfaces. It may, thus, has a certain impact on OPV performances, such as open-circuit voltage (Voc ). Our study provides device physicists a different perspective view for tailoring the organic energetic disorder parameter via interfaces in order to enhance photo-electron conversion efficiencies (PCE).