溶胶-凝胶法制备二氧化钛(TiO_(2))颗粒及其在钙钛矿太阳能电池中的应用

Preparation of TiO_(2) particles by sol-gel method andits application in perovskite solar cell

在溶胶-凝胶法的基础上利用两种不同的方法制备了二氧化钛(TiO_(2))颗粒,甲基橙降解实验表明两步乙醇法制备的TiO_(2)颗粒的催化降解性能优于一步法制备的TiO_(2);通过扫描电子显微镜(SEM)对TiO_(2)的表面形貌进行了表征,并利用X射线衍射(XRD)以及钙钛矿光电器件性能的表征可知一步法制备的TiO_(2)颗粒主要呈现出锐钛矿相,在空气的环境下将其应用于钙钛矿太阳能电池中,电池的光电转化效率(PCE)达到12.7%,而两步法制备的TiO_(2)颗粒出现了锐钛矿、金红石两种衍射峰,混晶形式使得钙钛矿电池的PCE下降至9.4%,因此可得出一步法制备的TiO_(2)作为电子传输层时可以提高钙钛矿太阳能电池的性能。

Titanium dioxide(TiO_(2))particles were prepared by two different methods based on the sol-gel method,and the methyl orange degradation experiments showed that the catalytic degradation performance of TiO_(2) particles prepared by the two-step ethanol method was better than that of TiO_(2) prepared by the one-step method,and the surface morphology of the TiO_(2) was characterized by scanning electron microscopy(SEM),and the surface morphology of TiO_(2) particles prepared by one-step method was characterized by X-ray diffraction(XRD)and the characterization of chalcogenide photovoltaic device performance shows that the TiO_(2) particles prepared by the one-step method mainly show anatase phase,and its application in chalcogenide solar cells under the environment of air,the photovoltaic conversion efficiency(PCE)of the cell reaches 12.7%,while the TiO_(2) particles prepared by the two-step method appear anatase and rutile two kinds of diffraction peaks,and the mixed-crystalline form makes the PCE of chalcogenide cells decreased to 9.4%,so it can be concluded that TiO_(2) prepared by one-step method can improve the performance of calcite solar cells when used as an electron transport layer.