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Simultaneous Enhancement of Efficiency and Photostability in Wide-Bandgap Perovskite Solar Cells via Managing Residual PbI <sub>2</sub> with a Phosphoramide Additive
One-line summary
A solar energy research paper on Simultaneous Enhancement of Efficiency and Photostability in Wide-Bandgap Perovskite Solar Cells via Managing Residual PbI <sub>2</sub> with a Phosphoramide Additive.
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Chinese explanation / 中文解读
中文解读待补充：本站会优先为光伏效率、钙钛矿太阳能电池、储能技术、太阳能热利用、BIPV、并网技术等高价值论文补充中文说明。
Original abstract
In wide-bandgap perovskite solar cells (WBG-PSCs), the addition of excess lead salts in a perovskite precursor is a popular strategy for fabricating high-efficiency devices. The presence of lead iodide (PbI 2 ) in perovskite films has been confirmed to enhance the device performance but introduces the intrinsic instability of perovskite under illumination due to its photodecomposition. In this work, we used tri( N, N -tetramethylene)phosphoramide (TPPA) as an additive to manage residual PbI 2 in perovskite films, which regulates the crystallization process of mixed-halide perovskites, promotes the formation of high-quality perovskite films, and stabilizes the perovskite films under light irradiation. As a result, WBG-PSCs with a band gap of 1.76 eV achieved a high open-circuit voltage close to 1.34 V and power conversion efficiency (PCE) of 21.4%. Furthermore, the devices with TPPA retained 90% of the initial PCE after 750 h during the maximum power point tracking process, while the control devices only retained 90% of the initial PCE after 270 h.
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