TiO2致密层对液结钙钛矿太阳电池光电性能的影响

Influence of TiO compact layer on the photovoltaic property of liquid junction perovskite solar cells

以浓度不同的钛酸二异丙酯溶液为前驱体,在掺氟氧化锡(FTO)基体上通过先旋涂再烧结的方法得到厚度0~153nm的TiO2致密层,用不同厚度的TiO2致密层封装成液结钙钛矿太阳电池并研究了TiO2致密层对液结钙钛矿太阳电池光电性能的影响。结果表明,随着TiO2致密层厚度的增加,其对FTO基体的覆盖率提高直至覆盖整个基体。电化学性能测试表明,FTO基体与TiO2致密层之间界面的肖特基势垒能够有效增加界面处的电荷转移电阻,进而显著提升电池的光电转换性能。

Took the diisopropyl titanate solution with different concentrations as the precursors,TiO2 compact layers series with the thickness of 0~153 nm were prepared on the F doped SnO2 substrate(FTO)through the method of spin-coating and then sintering.Subsequently,the compact layers were assembled into perovskite solar cells,and the photovoltaic performance of the solar cells with different compact layers was studied.The result shown that the coverage ratio of the substrate was increased by increasing the thickness of the compact layer,and the substrate will be fully covered in the final.The result of electrochemical properties shown that the schottky barrier at the FTO substrate and TiO2 compact layer interface will increase the charge transfer resistance efficiently,which will further improve the photovoltaic performance of the solar cells.