Probing film-depth-related light harvesting in polymer solar cells via plasma etching
作者： Shuang Gao , Laju Bu , Zhong Zheng , Xudong Wang , Weichen Wang
DOI: 10.1063/1.4982242
关键词:
摘要: Light harvesting is the first step of photovoltaic process in polymer solar cells. However, such donor: acceptor bulk junction layers are usually featured with vertical phase segregation as well film-depth-dependent molecular aggregation, chain orientation and crystallinity, leading to a significant variation photon absorption exciton generation at different film-depths. We propose an experimentally numerically accessible method investigate depth-dependent light behaviors active layer A low-pressure oxygen plasma utilized etch gradually which monitored by spectrometer. Including obtained sublayer spectra into transfer matrix optical model yields properties profiles, contribute quantum efficiency short-circuit current. This approach helpful optimize material provide insights process.
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