Takumi Kinoshita

Graduate School of Arts and Sciences, The University of Tokyo
Assistant Professor

Research AreasPhotoelectrochemistry, Energy-related chemistry
Participating Group (2018-2019)

Development of Organometallic Halide Perovskite Crystals with Innovative Photonics Functions

Organometal Halide Perovskite, Phase Transition, Solution Process, Photoelectric Conversion, Soft Crystal

Research Outline

Organometal halide perovskites are attracting attention worldwide as semiconductors for perovskite solar cells. As solar cell materials, their performance is equivalent or superior to CIGS, CdTe, and polycrystalline Si. Additionally, they also show crystal growth by the solution process. This researcher has studied the fundamental physical properties of organometal halide perovskites and high-performance solar cell devices. Recently, interesting phenomena such as the coexistence of multiple phases in the perovskite crystals have been investigated. Unlike compound semiconductors, organometal halide perovskites tend to undergo phase transition easily of the metal-halogen framework. The aim of this research is to clarify the relationship between the structure and physical properties of the perovskite materials, and to verify a new material design concept, i.e. the stabilization of exciton and carrier lifetimes by metal ion doping into perovskite crystals. In the future, the researcher intends to investigate the characteristics to improve the performance of perovskite solar cells and explores its applications in other fields.

Crystal Structure of Organometal Halide Perovskite


Academic papers/reviewed


  1. "Enhancement of Near-Infrared Singlet–Triplet Absorption of Ru(II) Sensitizers for Improving Conversion Efficiency of Solar Cells" T. Kinoshita, M. Otsubo, T. Ono, H. Segawa, ACS Appl. Energy Mater., 4 (7), 7052–7063 (2021)
  2. " Highly Efficient Wideband Solar Energy Conversion Employing Singlet-Triplet Transitions" T. Kinoshita, Bull. Chem. Soc. Jpn.,(2022),95(2),341-352.
  3. "Solid-state dye-sensitized solar cells using (CH3NH3)2SnI6 perovskite with wideband sensitizer" T. Kinoshita, R. Kakeno, H. Segawa, Chem. Lett., 2019, 48:7, 637-639.

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