TY - JOUR
T1 - Toward mixed-halide perovskites
T2 - insight into photo-induced anion phase segregation
AU - Guo, Yuxiao
AU - Yin, Xingtian
AU - Que, Wenxiu
AU - Liu, Weiguo
AU - Liu, Huan
N1 - Publisher Copyright:
© 2020 The Royal Society of Chemistry.
PY - 2020/11/14
Y1 - 2020/11/14
N2 - The tunable bandgap of mixed-halide perovskites (MHPs) makes them suitable for high-performance single-junction photovoltaics (PVs), as well as wide-bandgap components for multi-junction (tandem) structures. However, the composition engineering of halide ions, an effective procedure to adjust the bandgap of MHPs for PVs, result in photoinstability in MHPs due to the photo-induced anion phase segregation (PIAPS) effect. Specifically, MHP materials experience an inevitable phase transition from homogeneous alloys to conjugated lower/higher-bandgap phases, that is, iodide/bromide (I/Br)-rich domains, upon exposure to light. Reasonably, the sub-bandgap trapping states can lead to film inhomogeneity and performance deterioration in PVs. Meanwhile, it has been widely proven that the PIAPS phenomenon, even though it is reversible, may limit the commercial integration of MHPs in tandem applications because of their unstable output. Hence, in this review, initially, we study, analyze, and explore the "fashionable"PIAPS phenomenon systematically. Then, the feasible protocols to stabilize MHP materials, especially based on their correlation with the inherent mechanism of the PIAPS phenomenon, are adequately exhibited to help researchers develop more suitable procedures for its suppression. Finally, we provide some potential research points to study the PIAPS phenomenon and stabilize MHPs for their future commercial applications.
AB - The tunable bandgap of mixed-halide perovskites (MHPs) makes them suitable for high-performance single-junction photovoltaics (PVs), as well as wide-bandgap components for multi-junction (tandem) structures. However, the composition engineering of halide ions, an effective procedure to adjust the bandgap of MHPs for PVs, result in photoinstability in MHPs due to the photo-induced anion phase segregation (PIAPS) effect. Specifically, MHP materials experience an inevitable phase transition from homogeneous alloys to conjugated lower/higher-bandgap phases, that is, iodide/bromide (I/Br)-rich domains, upon exposure to light. Reasonably, the sub-bandgap trapping states can lead to film inhomogeneity and performance deterioration in PVs. Meanwhile, it has been widely proven that the PIAPS phenomenon, even though it is reversible, may limit the commercial integration of MHPs in tandem applications because of their unstable output. Hence, in this review, initially, we study, analyze, and explore the "fashionable"PIAPS phenomenon systematically. Then, the feasible protocols to stabilize MHP materials, especially based on their correlation with the inherent mechanism of the PIAPS phenomenon, are adequately exhibited to help researchers develop more suitable procedures for its suppression. Finally, we provide some potential research points to study the PIAPS phenomenon and stabilize MHPs for their future commercial applications.
UR - https://www.scopus.com/pages/publications/85095976183
U2 - 10.1039/d0tc03885g
DO - 10.1039/d0tc03885g
M3 - 文献综述
AN - SCOPUS:85095976183
SN - 2050-7534
VL - 8
SP - 14626
EP - 14644
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 42
ER -