| 标题 |
 Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar heterojunction solar cells 三卤化甲脒铅：用于高效平面异质结太阳能电池的宽可调钙钛矿
相关领域
三卤化物
甲脒
钙钛矿（结构）
异质结
带隙
材料科学
能量转换效率
太阳能电池
钙钛矿太阳能电池
光电子学
三碘化物
混合太阳能电池
纳米技术
卤化物
化学
无机化学
聚合物太阳能电池
结晶学
电极
物理化学
色素敏化染料
电解质
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Abstract Perovskite-based solar cells have attracted significant recent interest, with power conversion efficiencies in excess of 15% already superceding a number of established thin-film solar cell technologies. Most work has focused on a methylammonium lead trihalide perovskites, with a bandgaps of ∼1.55 eV and greater. Here, we explore the effect of replacing the methylammonium cation in this perovskite, and show that with the slightly larger formamidinium cation, we can synthesise formamidinium lead trihalide perovskites with a bandgap tunable between 1.48 and 2.23 eV. We take the 1.48 eV-bandgap perovskite as most suited for single junction solar cells, and demonstrate long-range electron and hole diffusion lengths in this material, making it suitable for planar heterojunction solar cells. |
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