Development of stable halide perovskite heterojunction supercrystals by photochemical assembly

• Project/Area Number: 23K26474
• Project/Area Number (Other): 23H01781 (2023)
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Multi-year Fund (2024); Single-year Grants (2023)
• Section: 一般
• Review Section: Basic Section 28010:Nanometer-scale chemistry-related
• Research Institution: Hokkaido University
• Principal Investigator: Biju V・Pillai 北海道大学, 電子科学研究所, 教授 (60392651)
• Project Period (FY): 2023-04-01 – 2027-03-31
• Project Status: Granted (Fiscal Year 2024)
• Budget Amount: ¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000); Fiscal Year 2026: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2025: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2024: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2023: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
• Keywords: Halide perovskite / Heterojunction / Supercrystals / Photochemistry

Outline of Research at the Start

Halide perovskites are the most promising classes of emergent semiconductor materials for solar cells and optical displays. Donor-acceptor-type perovskite heterojunctions are necessary for such applications. However, halide migration is a challenging issue in preparing stable heterojunctions, leading to undesired bandgap modification through halogen mixing. The overall outline of the project is to develop stable donor-acceptor-type heterojunction perovskites by suppressing halogen migration through halogen vacancies and capping perovskite surfaces using amphiphilic ligands.