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Water Vapor Treatment of Low-Temperature Deposited SnO2 Electron Selective Layers for Efficient Flexible Perovskite Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2017-08-25 00:00:00 , DOI: 10.1021/acsenergylett.7b00644 Changlei Wang 1, 2 , Lei Guan 1, 3 , Dewei Zhao 1 , Yue Yu 1 , Corey R. Grice 1 , Zhaoning Song 1 , Rasha A. Awni 1 , Jing Chen 4 , Jianbo Wang 3, 5 , Xingzhong Zhao 2 , Yanfa Yan 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2017-08-25 00:00:00 , DOI: 10.1021/acsenergylett.7b00644 Changlei Wang 1, 2 , Lei Guan 1, 3 , Dewei Zhao 1 , Yue Yu 1 , Corey R. Grice 1 , Zhaoning Song 1 , Rasha A. Awni 1 , Jing Chen 4 , Jianbo Wang 3, 5 , Xingzhong Zhao 2 , Yanfa Yan 1
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Tin oxide (SnO2) electron selective layers (ESLs) processed by low-temperature plasma-enhanced atomic layer deposition (PEALD) hold promise for fabricating lightweight and efficient flexible lead halide perovskite solar cells (PVSCs). However, the as-synthesized SnO2 ESLs typically lead to flexible PVSCs with lower open-circuit voltage (VOC) and fill factor (FF) as well as a higher degree of current density–voltage (J–V) hysteresis, compared to PVSCs fabricated on rigid substrates. Here, we report that facile water vapor treatment of PEALD-synthesized SnO2 ESLs can effectively improve the VOC and FF while reducing the degree of J–V hysteresis. The improvement in device performance is mainly attributed to the improved conductivity and electrical mobility of SnO2 ESLs enabled by water vapor treatment. With such treatment, our best flexible PVSC fabricated on a commercial substrate shows a power conversion efficiency of 18.36 (17.12)% when measured under a reverse (forward) voltage scan and a stabilized efficiency of 17.08%, which is the highest reported efficiency for flexible PVSCs with the regular structure.
中文翻译：
高效柔性钙钛矿太阳能电池低温沉积SnO 2电子选择层的水蒸气处理
通过低温等离子体增强原子层沉积（PEALD）处理的氧化锡（SnO 2）电子选择性层（ESLs）有望用于制造轻便高效的柔性卤化钙钛矿型铅酸钙太阳能电池（PVSC）。然而，与之相比，合成后的SnO 2 ESL通常导致柔性PVSC具有更低的开路电压（V OC）和填充系数（FF）以及更高的电流密度-电压（J – V）滞后性。在刚性基板上制造的PVSC。在这里，我们报告说，PEALD合成的SnO 2 ESL的简便水蒸气处理可以有效提高V OC和FF，同时降低J – V磁滞。器件性能的提高主要归因于通过水蒸气处理实现的SnO 2 ESL的电导率和电迁移率的提高。经过这样的处理，我们在商用基板上制造的最好的柔性PVSC在反向（正向）电压扫描下显示出18.36（17.12）％的功率转换效率和17.08％的稳定效率，这是报道的柔性最高效率具有规则结构的PVSC。
更新日期：2017-08-25
中文翻译：
高效柔性钙钛矿太阳能电池低温沉积SnO 2电子选择层的水蒸气处理
通过低温等离子体增强原子层沉积（PEALD）处理的氧化锡（SnO 2）电子选择性层（ESLs）有望用于制造轻便高效的柔性卤化钙钛矿型铅酸钙太阳能电池（PVSC）。然而，与之相比，合成后的SnO 2 ESL通常导致柔性PVSC具有更低的开路电压（V OC）和填充系数（FF）以及更高的电流密度-电压（J – V）滞后性。在刚性基板上制造的PVSC。在这里，我们报告说，PEALD合成的SnO 2 ESL的简便水蒸气处理可以有效提高V OC和FF，同时降低J – V磁滞。器件性能的提高主要归因于通过水蒸气处理实现的SnO 2 ESL的电导率和电迁移率的提高。经过这样的处理，我们在商用基板上制造的最好的柔性PVSC在反向（正向）电压扫描下显示出18.36（17.12）％的功率转换效率和17.08％的稳定效率，这是报道的柔性最高效率具有规则结构的PVSC。
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