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Efficient stable graphene-based perovskite solar cells with high flexibility in device assembling via modular architecture design
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2019-10-30 , DOI: 10.1039/c9ee02391g Chunyang Zhang 1, 2, 3, 4, 5 , Shi Wang 1, 2, 3, 4, 5 , Hong Zhang 6, 7, 8, 9, 10 , Yulin Feng 3, 5, 11, 12, 13 , Wenming Tian 4, 5, 14, 15, 16 , Ying Yan 3, 4, 5, 17 , Jiming Bian 3, 5, 11, 12, 13 , Yuchen Wang 1, 2, 3, 4, 5 , Shengye Jin 4, 5, 14, 15, 16 , Shaik Mohammed Zakeeruddin 6, 7, 8, 9, 10 , Michael Grätzel 6, 7, 8, 9, 10 , Yantao Shi 1, 2, 3, 4, 5
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2019-10-30 , DOI: 10.1039/c9ee02391g Chunyang Zhang 1, 2, 3, 4, 5 , Shi Wang 1, 2, 3, 4, 5 , Hong Zhang 6, 7, 8, 9, 10 , Yulin Feng 3, 5, 11, 12, 13 , Wenming Tian 4, 5, 14, 15, 16 , Ying Yan 3, 4, 5, 17 , Jiming Bian 3, 5, 11, 12, 13 , Yuchen Wang 1, 2, 3, 4, 5 , Shengye Jin 4, 5, 14, 15, 16 , Shaik Mohammed Zakeeruddin 6, 7, 8, 9, 10 , Michael Grätzel 6, 7, 8, 9, 10 , Yantao Shi 1, 2, 3, 4, 5
Affiliation
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Carbon-based perovskite solar cells (C-PSCs) are emerging as low-cost stable photovoltaics. However, their power conversion efficiency (PCE) still lags behind that of devices based on Au or Ag as the current collector. Here, we introduced an innovative modular PSC design using a carbon back electrode, whose sheet resistance and thickness were greatly reduced by covering it with another carbon-coated FTO glass that was applied under pressure. We showed that these two individual elements could be assembled and separated repeatedly. Moreover, among the various commercial carbon sources (carbon black, graphite sheet, and graphene), graphene exhibited the best overall performance, showing the crucial importance of graphene as a charge collector. Power conversion efficiency (PCE) of 18.65% was achieved for graphene-based PSCs (G-PSCs), which was among the highest efficiency reported so far for C-PSCs. Moreover, the optimized devices without encapsulation retained 90% of their initial PCE after aging at an elevated temperature of 85 °C for 1000 h. Remarkably, G-PSCs showed significant structural flexibility; there was negligible degradation in PCE after repeated disassembling and assembling for more than 500 cycles. Our system provides a promising prospect for the facile repair and maintenance of PSCs via modular interconnections; related strategies may be extended to other devices.
中文翻译：
高效稳定的基于石墨烯的钙钛矿太阳能电池，通过模块化架构设计，在设备组装中具有很高的灵活性
碳基钙钛矿太阳能电池（C-PSC）逐渐成为低成本的稳定光伏电池。但是，它们的功率转换效率（PCE）仍然落后于以Au或Ag为集电器的设备。在这里，我们介绍了一种使用碳背电极的创新模块化PSC设计，通过用压力下施加的另一种碳涂层FTO玻璃覆盖该碳背电极，可大大降低其薄层电阻和厚度。我们证明了这两个单独的元素可以反复组装和分离。此外，在各种商业碳源（炭黑，石墨片和石墨烯）中，石墨烯表现出最佳的整体性能，显示出石墨烯作为电荷收集器的至关重要性。石墨烯基PSC（G-PSC）的功率转换效率（PCE）为18.65％，这是迄今为止针对C-PSC报道的最高效率之一。此外，经过优化的无封装器件在85°C的高温下老化1000小时后，仍保留了其初始PCE的90％。值得注意的是，G-PSC表现出显着的结构灵活性。重复拆卸和组装超过500个循环后，PCE的降解可忽略不计。我们的系统为PSC的轻松维修提供了广阔的前景通过模块化互连；相关策略可以扩展到其他设备。
更新日期：2019-10-30
中文翻译：
高效稳定的基于石墨烯的钙钛矿太阳能电池，通过模块化架构设计，在设备组装中具有很高的灵活性
碳基钙钛矿太阳能电池（C-PSC）逐渐成为低成本的稳定光伏电池。但是，它们的功率转换效率（PCE）仍然落后于以Au或Ag为集电器的设备。在这里，我们介绍了一种使用碳背电极的创新模块化PSC设计，通过用压力下施加的另一种碳涂层FTO玻璃覆盖该碳背电极，可大大降低其薄层电阻和厚度。我们证明了这两个单独的元素可以反复组装和分离。此外，在各种商业碳源（炭黑，石墨片和石墨烯）中，石墨烯表现出最佳的整体性能，显示出石墨烯作为电荷收集器的至关重要性。石墨烯基PSC（G-PSC）的功率转换效率（PCE）为18.65％，这是迄今为止针对C-PSC报道的最高效率之一。此外，经过优化的无封装器件在85°C的高温下老化1000小时后，仍保留了其初始PCE的90％。值得注意的是，G-PSC表现出显着的结构灵活性。重复拆卸和组装超过500个循环后，PCE的降解可忽略不计。我们的系统为PSC的轻松维修提供了广阔的前景通过模块化互连；相关策略可以扩展到其他设备。
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