[10a-PB1-1~33] 12.5 Organic, Perovskite, and hybrid solar cells

[10a-PB1-12] Investigation of Interfacial Charge States in D149-Sensitized Double Perovskite Solar Cells

〇(D)Yanqiu YANG¹, Yizhou Chen¹, Yukihiro Shimoi^1,2, Kazuhiro Marumoto^1,2,3 (1.Dep. Mater. Sci., Univ. Tsukuba, 2.OIQSST, Univ. Tsukuba, 3.TREMS, Univ. Tsukuba)

Keywords:

Double Perovskite Solar Cells,Dye D149,electron spin resonance

Cs₂AgBiBr₆ is considered a promising next-generation photovoltaic material owing to its high chemical stability and low toxicity. However, its relatively poor light-harvesting capability limits device performance. The introduction of the indoline-based dye D149 has been reported to enhance light absorption and improve charge-injection properties in Cs₂AgBiBr₆ solar cells. In our previous work, we investigated the charge states and degradation mechanisms of D149-sensitized Cs₂AgBiBr₆ solar cells using operando electron spin resonance (ESR) spectroscopy. In the present study, we identified the origin of accumulated charges through detailed ESR spectral analysis and examined the relationship between interfacial dipole formation and band bending.