講演情報
[15a-K402-7]Efficient perovskite solar cells using chlorophyll derivatives as hole transport layers
〇Tsutomu Miyasaka2, Ziyan Liu1,2, XiaoFeng Wang1, Masashi Ikegami2 (1.Jilin University, 2.Toin Univ. Yokohama)
キーワード：
perovskite、chlorophyll、hole transport
Chlorophylls (Chls) and their derivatives are the most ubiquitous pigments used in photosynthetic organisms. When deposited as thin films, Chls and their semi-synthetic derivatives act as molecular organic semiconductors, demonstrating good charge carrier mobility and suitable Fermi energy levels for optoelectronic devices. To explore the potential of using Chls as HTL in perovskite solar cells, we synthesized polymerized Chl derivatives through electrochemical polymerization. This method improved the charge transport ability compared to the monomers. Additionally, we investigated the performance of Chl derivatives with different substituents, leading to further enhancements in the power conversion efficiency of the solar cell. The incorporation of Chls optimizes interfacial energy band bending and minimizes interfacial defects, while the growth sites provided by Chls facilitate the formation of high-quality perovskite films with reduced lattice strain and high crystal orientation. This method led to fabrication of solar cells with high power conversion efficiency.