Working from Both Sides: Composite Metallic Semitransparent Top Electrode for High Performance Perovskite Solar Cells

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• 作者：Xuezeng Dai ; Ye Zhang ; Heping Shen ; Qiang Luo ; Xingyue Zhao ; Jianbao Li ; Hong Lin
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：February 24, 2016
• 年：2016
• 卷：8
• 期：7
• 页码：4523-4531
• 全文大小：718K
• ISSN：1944-8252

文摘

We report herein perovskite solar cells using solution-processed silver nanowires (AgNWs) as transparent top electrode with markedly enhanced device performance, as well as stability by evaporating an ultrathin transparent Au (UTA) layer beneath the spin-coated AgNWs forming a composite transparent metallic electrode. The interlayer serves as a physical separation sandwiched in between the perovskite/hole transporting material (HTM) active layer and the halide-reactive AgNWs top-electrode to prevent undesired electrode degradation and simultaneously functions to significantly promote ohmic contact. The as-fabricated semitransparent PSCs feature a V_oc of 0.96 V, a J_sc of 20.47 mA cm^–2, with an overall PCE of over 11% when measured with front illumination and a V_oc of 0.92 V, a Jsc of 14.29 mA cm^–2, and an overall PCE of 7.53% with back illumination, corresponding to approximately 70% of the value under normal illumination conditions. The devices also demonstrate exceptional fabrication repeatability and air stability.