Yoo, S.-M. Lee, S.-Y. Kim, G. Hernandez, E.V. Mora-Ser？, I. Yoon, S.J. Shin, T. Lee, S.-H. Ahn, Seok hoon Song, M.-K. Kim, M. Lee, H.J. 2024-01-19T14:33:10Z 2024-01-19T14:33:10Z 2021-09-02 2021-06 0169-4332 https://pubs.kist.re.kr/handle/201004/116960 Metal chalcogenide quantum dot (QD)-like all-inorganic nanoscale perovskite photosensitizers of CsPbIxBr3-x were prepared on the surface of mesoscopic TiO2 film by a direct two-step spin-coating of lead and cesium halide precursors for application into solid-state dye-sensitized solar cells (DSSCs), as confirmed by impedance frequency response analysis. A few nanometer-sized hemisphere-shaped dots of CsPbIxBr3-x perovskites were deposited and distributed separately onto TiO2, which were checked by scanning and transmission electron microscopic (SEM and TEM) techniques. The as-deposited CsPbIxBr3-x perovskites were stable only in the case of including about 20% or more bromide in the composition of halides. When the bromide content increased in the ratio of halides of CsPbIxBr3-x, gradual decrease in lattice spacing and blue-shift of emission peaks were observed in X-ray diffraction (XRD) and photoluminescence (PL) measurements, respectively. These well-defined nano-particulate CsPbIxBr3-x perovskites were incorporated into solid-state DSSCs and tested as a new type of photosensitizers. The initial power conversion efficiency (PCE) of ca. 1.0？3.5% based on relatively thin mesoporous TiO2 film (~1 μm) looks promising with many parameters remaining for possibly more optimization. The best result, 3.79%, was obtained from CsPbI2.2Br0.80 25 days after initial measurement. These CsPbIxBr3-x-sensitized cells displayed a stable record of PCE over ~2 month and no hysteresis behavior in current-voltage traces. ？ 2021 Elsevier B.V. English Elsevier B.V. Preparation of nanoscale inorganic CsPbIxBr3-x perovskite photosensitizers on the surface of mesoporous TiO2 film for solid-state sensitized solar cells Article 10.1016/j.apsusc.2021.149387 1 Applied Surface Science, v.551 Applied Surface Science 551 N scie scopus 000674654300032 2-s2.0-85102404375 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article Blue shift Bromine compounds Cesium compounds Dye-sensitized solar cells Film preparation Frequency response Lead compounds Nanostructured materials Perovskite solar cells Photosensitizers Semiconductor quantum dots Titanium dioxide Dye- sensitized solar cells Impedance spectroscopy Inorganic perovskite Inorganics Mesoporous TiO$-2$ Nano scale Nanoscale perovskite Photosensitiser TiO$-2$/ films Two step depositions Perovskite Dye-sensitized solar cells Impedance spectroscopy Inorganic perovskites Nanoscale perovskites Photosensitizer Two-step deposition