In an attempt to replace thermally vulnerable organic perovskites, considerable research effort has recently been focused on the development of all-inorganic perovskites in the field of photovoltaics. The preceding studies demonstrated that cesium lead halide perovskites are promising candidates for thermally stable and efficient solar cell materials. Here, the recent progress in cesium lead halide perovskite-based solar cells is summarized. Whether organic cations are essential for the superiority of halide perovskites is controversial. However, more than 13% efficient solar cells have been successfully fabricated by employing cesium lead halide perovskites in a short amount of time. The state-of-the-art materials engineering techniques will help to achieve a remarkable photovoltaic performance comparable to that of organic perovskites. In addition, improved understanding of the intrinsic photophysical behaviors will provide new insights that will facilitate further improvements in solar cell applications.
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MAPbI3 but not in CsPbI2Br. This difference was further supported by the PL measurements, exhibiting suppressed photoinduced halide segregation in the CLH perovskites. The stability of the solar cells was examined under continuous 1 sun illumination, showing that the CsPbI2Br-based solar cell retained its initial PCE for 1500 h, while the MAPbI3-based solar cell severely degraded within 50 h (Figure 13b, bottom). It was somewhat encouraging that CLH perovskites could be a potential alternative to organic perovskites as photostable solar cell materials.[81,82] The soft nature of organic molecules and dipole-induced reorientation might be responsible for this behavior, which is supported by the preceding literature. In fact, further investigation should be performed to identify the origin of the distinguishable photophysics in organic-and CLH perovskites.
The authors gratefully acknowledge the support from the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea (20163010012450, 20173010013340). This work was also partially supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT, and Future Planning (MSIP) of the Republic of Korea (2016R1A2A1A05005216).
All Science Journal Classification (ASJC) codes
- Medicine (miscellaneous)
- Chemical Engineering(all)
- Biochemistry, Genetics and Molecular Biology (miscellaneous)
- Materials Science(all)
- Physics and Astronomy(all)