Mixed halide perovskite materials exhibited excellent optoelectronic, ionic, and electronic properties, extending the possibility of introducing them as an efficient electrode material for energy storage and conversion applications. In this work, we performed the synthesis of CsPbIBr₂ in ambient conditions and investigated its characteristics for solar cells and energy storage devices. The X-ray diffraction (XRD) technique is employed for the structural characterization of the as-synthesized perovskite crystals. The optical bandgap of ⁓ 2.1 eV is revealed utilizing UV-Vis, photoluminescence (PL), and diffuse reflectance (DR) spectroscopies. The photovoltaic performance of the as-synthesized CsPbIBr₂ perovskite for solar cell devices is initially tuned by varying precursor solution quantity to obtain the optimum performance. The optimized PCE of 6.2% is achieved for the device without a hole transport layer (HTL) and with carbon as the counter electrode. Impedance spectroscopy (IS) is employed to investigate the impact of solution quantity on interfacial charge transport kinetics. Further, the electrochemical properties of the perovskite are elucidated by analyzing cyclic voltammetry (CV) voltammograms, and galvanostatic charge-discharge (GCD) curves recorded at different scan rates and current densities, respectively. The specific capacity of 570 C/g is recorded under dark conditions. Our findings demonstrate the dual applications of the perovskites and will pave a pathway to develop new potential electrode materials based on perovskite for energy conversion and storage devices.

中文翻译：

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研究用于太阳能电池和储能应用的空气加工 CsPbIBr₂ 钙钛矿电极的协同特性


混合卤化物钙钛矿材料表现出优异的光电、离子和电子特性，扩展了将其作为能量存储和转换应用的有效电极材料引入的可能性。在这项工作中，我们在环境条件下进行了 CsPbIBr₂ 的合成，并研究了其对太阳能电池和储能器件的特性。X 射线衍射 （XRD） 技术用于合成钙钛矿晶体的结构表征。利用紫外-可见分光光、光致发光 （PL） 和漫反射 （DR） 光谱揭示了 \u2012 2.1 eV 的光学带隙。用于太阳能电池器件的合成 CsPbIBr₂ 钙钛矿的光伏性能最初通过改变前驱体溶液的数量来调整，以获得最佳性能。对于没有空穴传输层 （HTL） 且以碳作为对电极的器件，实现了 6.2% 的优化 PCE。阻抗谱 （IS） 用于研究溶液量对界面电荷传输动力学的影响。此外，通过分析循环伏安法 （CV） 伏安图和在不同扫描速率和电流密度下记录的恒电流充放电 （GCD） 曲线，阐明了钙钛矿的电化学性质。在黑暗条件下记录的比容量为 570 C/g。我们的研究结果证明了钙钛矿的双重应用，并将为开发基于钙钛矿的新型潜在电极材料铺平道路，用于能量转换和存储器件。