Construction of design rules of stable, multi-gap perovskite photovoltaic devices

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04809
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 28010:Nanometer-scale chemistry-related
• Research Institution: The University of Shiga Prefecture
• Principal Investigator: Takeo Oku 滋賀県立大学, 工学部, 教授 (30221849)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: ペロブスカイト / 太陽電池 / 光電変換素子 / マルチギャップ / 微細構造 / 組成傾斜 / 高耐久性 / 設計原理

Outline of Final Research Achievements

The structural stabilities and energy band gaps of perovskite crystals with various elements introduced were predicted by using first-principles calculations. Actually, self-organized compositionally graded structures aiming at multi-band gaps were attained with controlled crystal structures and microstructures by high temperature annealing and multi-step remelting stacking using perovskite precursor solutions and decaphenylcyclopentasilane hole transport layers. Formation of highly durable compositionally graded photovoltaic devices were achieved.

Free Research Field

物質科学

Academic Significance and Societal Importance of the Research Achievements

本研究では、ペロブスカイト前駆体溶液とデカフェニルシクロペンタシランホール輸送層を用いた高温熱処理多段階再溶融積層により、微細構造制御マルチバンドギャップを目指した高耐久性組成傾斜光電変換素子自己組織形成という独自な手法を開発した点で学術的意義があり、簡易に低コストで耐久性の高い光電変換素子を形成できるため、2050年カーボンニュートラル実現に大きく貢献できる可能性を有し、社会的意義は極めて大きい。