Poly(methyl methacrylate) embedded perovskite films for improving solar cell performance

•A void-passivated transparent perovskite films were prepared by utilizing a PMMA as a framework for crystal growth.•The semitransparent perovskite film is prepared from PbICl layer assisting sequential inter-diffusion process.•The perovskite film based photovoltaic device with PMMA presents 15.46%...

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Bibliographic Details
Published in:Synthetic metals 2019-03, Vol.249, p.47-51
Main Authors: Ko, Yohan, Kim, Youbin, Lee, Chanyong, Kim, Yechan, Jun, Yongseok
Format: Article
Language:English
Subjects:
Carrier transport
Chlorobenzene
Crystal growth
Diffusion layers
Energy conversion efficiency
Perovskite solar cells
Perovskites
Photoelectric effect
Photoelectric emission
Photovoltaic cells
PMMA
Polymers
Polymethyl methacrylate
Semi-transparent perovskite film
Solar cells
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Summary:•A void-passivated transparent perovskite films were prepared by utilizing a PMMA as a framework for crystal growth.•The semitransparent perovskite film is prepared from PbICl layer assisting sequential inter-diffusion process.•The perovskite film based photovoltaic device with PMMA presents 15.46% efficiency with less hysteresis. Semi-transparent photovoltaics are promising technologies to be applied for building-integrated elements and alternative windows. Notably, organometallic halide perovskite solar cells that have shown unprecedented power conversion efficiencies (PCEs) are highly attractive for integration as solar windows in buildings because of its low-cost manufacturing and tunable transparency in the visible regime. Here, we demonstrate an approach to fabricate void-passivated transparent perovskite films by utilizing a poly(methyl methacrylate) (PMMA) as a framework for crystal growth. The semitransparent perovskite film (average visible transmittance, AVT of ˜ 35.2%) is prepared from PbICl layer assisting sequential inter-diffusion process in which PMMA (PMMA dissolved in chlorobenzene) is added into CH3NH3I (MAI) solution. The presence of PMMA in perovskite films have a negligible effect on transparency, and the coverage and crystallinity of perovskite films are improved. Intensity-modulated photocurrent spectroscopy (IMPS) and time-correlated single photon counting (TCSPC) characterization further demonstrate that the PMMA embedded perovskite films have better carrier transport and enhanced carrier extraction rate. The semitransparent perovskite film based photovoltaic device with PMMA presents 15.46% efficiency with less hysteresis, which is mainly attributed to increased Jsc.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2019.01.015