We report a simple method to prepare an efficient hole-transport-free perovskite solar cell (HT-free PSC) directly on fluorine-doped tin oxide (FTO) by spin coating of precursors with various spinning times. X-ray diffraction (XRD) results exhibited an improvement in the crystallinity of fabricated PSC with increase spinning time. The optical studies clearly revealed a similarity in the transmittance spectra and the band gap (1.52 eV) of prepared PSCs. The field emission scanning electron microscope (FESEM) and atomic force microscope (AFM) images showed increasing in the perovskite grain size with increase spinning time. All photovoltaic parameters such as short circuit current (J_sc), open circuit voltage (V_oc), and fill factor (FF) demonstrated enhancement at long spinning time due to increase light absorption and photo-generated current. The highest PCE was achieved by PSC fabricated at spinning time of the 60 s.

我们报告了一种简单的方法，可以通过旋涂各种纺丝时间的前驱体直接在掺氟的氧化锡（FTO）上直接制备高效的无空穴传输的钙钛矿型太阳能电池（不含HT的PSC）。X射线衍射（XRD）结果显示，随着纺丝时间的增加，制成的PSC的结晶度得到改善。光学研究清楚地表明，制备的PSC的透射光谱和带隙（1.52 eV）相似。场发射扫描电子显微镜（FESEM）和原子力显微镜（AFM）图像显示钙钛矿晶粒尺寸随纺丝时间的增加而增加。所有光伏参数，例如短路电流（J _sc），开路电压（V _oc），并且由于增加了光吸收和光生电流，因此填充因子（FF）在较长的纺丝时间表现出增强。通过在60 s的旋转时间内制造的PSC可获得最高的PCE。