2017
DOI: 10.1246/cl.160994
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Open-circuit Voltage Loss in CH3NH3SnI3 Perovskite Solar Cells

Abstract: Organicinorganic perovskite solar cells based on tin halides exhibit a small open-circuit voltage (V OC ) because of a large photon energy loss from band-gap energy, as large as 0.81.0 eV. In this study, we discussed the origin of the V OC loss in CH 3 NH 3 SnI 3 -based devices by measuring the temperature dependence of V OC . As a result, we found that the large loss in V OC is mainly due to the surface recombination at the interface rather than the bulk recombination in the perovskites. Organicinorganic pero… Show more

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Cited by 46 publications
(9 citation statements)
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References 31 publications
(31 reference statements)
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“…Organic–inorganic lead halide perovskite (e.g., CH 3 NH 3 PbI 3 ) solar cells (PSCs) have attracted much attention because their device performance has progressed rapidly . Because of a concern about conventional PSCs containing toxic lead, lead‐free PSCs, such as methylammonium tin tri‐iodide perovskite (MASnI 3 ) solar cells have been developed . The problem with the pure tin PSC was its unstable device performance, such that the reported efficiencies of power conversion (PCE), 5–6 %, were difficult to reproduce .…”
Section: Figurementioning
confidence: 99%
“…Organic–inorganic lead halide perovskite (e.g., CH 3 NH 3 PbI 3 ) solar cells (PSCs) have attracted much attention because their device performance has progressed rapidly . Because of a concern about conventional PSCs containing toxic lead, lead‐free PSCs, such as methylammonium tin tri‐iodide perovskite (MASnI 3 ) solar cells have been developed . The problem with the pure tin PSC was its unstable device performance, such that the reported efficiencies of power conversion (PCE), 5–6 %, were difficult to reproduce .…”
Section: Figurementioning
confidence: 99%
“…Another reason is due to the tin and iodide vacancies as a result of the weak bonding energy of these elements . Fast crystallization of tin halide perovskite promotes the formation of pinholes and a rough surface, finally leading to a higher charge carrier recombination rate. , All these result in a large open-circuit voltage loss of more than 0.8 eV …”
mentioning
confidence: 99%
“…1,2) As shown in Fig. 2 against the photon energy E. [20][21][22][23] The bandgap energy increased from 1.57 to 1.59 eV with decreasing grain size of perovskites. These results are consistent with previous reports.…”
Section: Film Morphologymentioning
confidence: 89%