光子学报, 2017, 46 (2): 0223003, 网络出版: 2017-02-23
阳极界面修饰对钙钛矿太阳能电池性能的影响
Influence of Anode Interface Modification on the Performance of Perovskite Solar Cells
钙钛矿太阳能电池 阳极界面层 电导率 能量转换效率 Perovskite solar cells PEDOT: PSS PEDOT∶PSS Anode interface layer Conductivity Power conversion efficiency
摘要
采用在聚(3,4-乙撑二氧噻吩)∶聚苯乙烯磺酸(Poly(3,4-ethylenedioxythiophene)∶Poly(styrenesulfonate), PEDOT∶PSS)阳极界面层上直接旋涂二甲基亚砜(Dimethyl Sulfoxide, DMSO)的方法, 对PEDOT∶PSS薄膜进行修饰, 以提高所制得的钙钛矿太阳能电池器件性能.在5000 rpm转速条件下旋涂DMSO后, 器件的能量转换效率达到11.43%, 与PEDOT∶PSS阳极界面层未做任何修饰的器件相比, 效率提高了29.15%.测试表征了修饰前后PEDOT∶PSS薄膜的透光性、表面形貌、电导率、器件的外量子效率曲线以及器件在光照和暗态下的J-V特性曲线, 分析了器件性能提高的原因.结果表明: 经过修饰的PEDOT∶PSS薄膜导电性显著增强, 从而更加有利于器件阳极对空穴的抽取和收集; 较未修饰时, 器件的短路电流密度得到了大幅度提升, 进而使得器件获得更高的能量转换效率.
Abstract
The Poly(3,4-ethylenedioxythiophene)∶Poly(styrenesulfonate) (PEDOT∶PSS)films modified by the method of Dimethyl Sulfoxide (DMSO) was directly spin-coated on the PEDOT∶PSS anode interface layer, which made the performance of perovskite solar cells device has been greatly improved. Under the DMSO spin-coating speed of 5000 rpm, the power conversion efficiency of the device has reached up to 11.43%, which increases 29.15% compared with the device with an unmodified PEDOT∶PSS anode interface layer. The transmission spectra, surface morphology, conductivity of the PEDOT∶PSS films before and after modification were tested, and the external quantum efficiency curve and the J-V characteristic curve under illumination and dark were also tested to reveal the origin of the improvement of the device performance. The results show that, the conductivity of the modified PEDOT∶PSS film has been improved significantly, and thus the anode of the device can more efficiently extract and collect the charge carriers of holes. Compared with the device with unmodified PEDOT∶PSS, the short circuit current density of the modified device has been enlarged significantly that accounts for the higher power conversion efficiency.
刘大超, 崔运超, 李光, 李晓苇, 杨少鹏. 阳极界面修饰对钙钛矿太阳能电池性能的影响[J]. 光子学报, 2017, 46(2): 0223003. LIU Da-chao, CUI Yun-chao, LI Guang, LI Xiao-wei, YANG Shao-peng. Influence of Anode Interface Modification on the Performance of Perovskite Solar Cells[J]. ACTA PHOTONICA SINICA, 2017, 46(2): 0223003.