城戸・笹部・千葉研究室M2 長澤佳祐君と佐野健志教授らのヒドロキシルアミン系添加剤による逆型ペロブスカイト太陽電池の特性及び信頼性向上の論文が Wiley の Adv. Mater. Interfaces (IF: 5.4) に受理されました。
Title: Improving the Photovoltaic Properties and Stability of Inverted Perovskite Solar Cells with Hydroxylamine-based Additives
By Keisuke Nagasawa, Takeshi Sano,* Viet Nguyen Chau, Kensei Enomoto, Yutaka Okuyama, Yuya Sayama, Ryosuke Oikawa, Takayuki Chiba, Junji Kido, Adv. Mater. Interfaces. 2023, accepted.
Abstract: Organic–inorganic halide perovskite solar cells (PVSCs) are considered a promising emerging photovoltaic technology that offer exceptional optoelectronic properties and the potential for economic solar energy conversion. Additive engineering-based fabrication processes can achieve highly efficient and stable PVSCs that feature well-controlled perovskite layers with a dense, uniform, “black” α-phase crystal structure, as well as large grains and few defects. In this study, several hydroxylamine derivatives are introduced as additives to FAPbI3 precursor solutions to investigate their effects on the performance of PVSCs. The addition of hydroxylamine derivatives suppresses the formation of the unwanted δ-phase and lead iodide, while the α-phase cubic structure is preferentially formed without changing the bandgap of FAPbI3. Additionally, the additive-treated perovskite films show improved stability compared with those without additives. Moreover, using X-ray diffraction and X-ray photoelectron spectroscopy analyses, it is discovered that the hydroxylamine-based additives are not incorporated in the crystal lattices but rather resided on the surface or grain boundaries. Notably, the inverted PVSCs added with N-methylhydroxylamine exhibit an improved power conversion efficiency, higher stability, and minimal hysteresis.