Sb2S3:P3HT共混物改善TiO2纳米棒阵列钙钛矿太阳电池的性能

为解决钙钛矿太阳电池中MAPbI₃的不稳定性问题，提高电池性能，对以TiO₂纳米棒阵列作为电子传输层、Sb₂S₃:P3HT共混物作为钙钛矿MAPbI₃修饰层的太阳电池进行了研究。首先，以SbCl₃作为锑源，Na₂S₂O₃作为硫源，采用溶剂热法制备合适尺寸的Sb₂S₃纳米球；其次，通过超声分散法将Sb₂S₃与P3HT在氯苯溶液中共混得到Sb₂S₃:P3HT共混物，将其旋涂于沉积了MAPbI₃薄膜的TiO₂纳米棒阵列上，形成FTO/TiO₂NR/MAPbI₃/Sb₂S₃:P3HT复合膜，制备成TiO₂纳米棒阵列MAPbI₃/Sb₂S₃:P3HT太阳电池；最后，采用SEM，XRD，J-V曲线和紫外可见吸收光谱等方法进行表征和测试。结果表明，制备的结构为FTO/TiO₂NR/MAPbI₃/Sb₂S₃:P3HT/Spiro-OMeTAD/Ag的太阳电池，能量转换效率（PCE）最高达到了14.73％，与未采用Sb₂S₃:JP]P3HT共混物修饰的TiO₂纳米棒阵列MAPbI₃太阳电池相比，能量转换效率得到了明显提升。因此，Sb₂S₃:P3HT共混物能避免出现钙钛矿MAPbI₃被氧化的不稳定性问题，可有效提高TiO₂纳米棒阵列MAPbI₃太阳电池的性能。

Improvement of Sb2S3:P3HT blend on the property of TiO2 nanorod array perovskite solar cell

In order to solve the instability of MAPBI3 in perovskite solar cells and improve the performance of the cells,TiO2 nanorod array was used as electron transport layer and Sb2S3:P3HT blend was used as modification layer of perovskite MAPbI3. Firstly,Sb2S3 nanospheres with appropriate size were prepared by solvothermal method,in which SbCl3 and Na2S2O3 were used as antimony and sulfur sources. Secondly,Sb2S3 and P3HT were mixed in chlorobenzene solution by ultrasonic dispersion method to obtain Sb2S3:P3HT blend,which was coated on TiO2 nanorod array deposited with MAPbI3 thin film to form FTO/TiO2NR/MAPbI3/Sb2S3:P3HT composite film,and Sb2S3:P3HT blend modified TiO2 nanorods array MAPbI3 solar cell was fabricated.Finally,the solar cell was characterized and tested with SEM,XRD,J-V curves and uv-vis absorption spectroscopy.The results show that the maximum power conversion efficiency (PCE) for the FTO/TiO2NR/MAPbI3/Sb2S3:P3HT/Spiro-OMeTAD/Ag solar cell is 14.73%.Compared with the PCE of TiO2 nanorod array MAPbI3 solar cell without Sb2S3:P3HT blend modification,the power conversion efficiency of the Sb2S3:P3HT blend modified solar cell was significantly improved.Therefore,Sb2S3:P3HT blend can efficiently avoid the instability of perovskite MAPbI3 oxidation,which provides a reference for improving the performance of TiO2 nanorod array MAPbI3 solar cell.