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Thermally Stable Passivation toward High Efficiency Inverted Perovskite Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-10-01 , DOI: 10.1021/acsenergylett.0c01813 Robert D. J. Oliver 1 , Yen-Hung Lin 1 , Alexander J. Horn 1 , Chelsea Q. Xia 1 , Jonathan H. Warby 1 , Michael B. Johnston 1 , Alexandra J. Ramadan 1 , Henry J. Snaith 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-10-01 , DOI: 10.1021/acsenergylett.0c01813 Robert D. J. Oliver 1 , Yen-Hung Lin 1 , Alexander J. Horn 1 , Chelsea Q. Xia 1 , Jonathan H. Warby 1 , Michael B. Johnston 1 , Alexandra J. Ramadan 1 , Henry J. Snaith 1
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Although metal halide perovskite photovoltaics have shown an unprecedented rise in power conversion efficiency (PCE), they remain far from their theoretical PCE limit. Among the highest efficiencies to date are delivered when polycrystalline films are enhanced via “molecular passivation”, but this can introduce new instabilities, in particular under severe accelerated aging conditions (e.g., at 85 °C in the dark or under full spectrum simulated sunlight). Here, we utilize a benzylammonium bromide passivation treatment to improve device performance, achieving the champion stabilized power output (SPO) of 19.5 % in a p-i-n device architecture. We correlate the improved device performance with a significant increase in charge carrier diffusion lengths, mobilities, and lifetimes. Furthermore, treated devices maintain an increased performance during 120 h combined stressing under simulated full spectrum sunlight at 85 °C, indicating that enhancement from this passivation treatment is sustained under harsh accelerated aging conditions. This is a crucial step toward real-world operation-relevant passivation treatments.
中文翻译：
高效高效热转化钝化钙钛矿太阳能电池
尽管金属卤化物钙钛矿光伏电池已显示出功率转换效率（PCE）前所未有的提高，但距离理论PCE极限还很远。当通过“分子钝化”增强多晶膜时，效率是迄今为止最高的，但这会带来新的不稳定性，尤其是在严重的加速老化条件下（例如，在黑暗中的85°C或全光谱模拟阳光下） 。在这里，我们利用苄基溴化铵钝化处理来改善器件性能，从而在引脚上实现了19.5％的冠军稳定输出功率（SPO）设备架构。我们将改善的器件性能与电荷载流子扩散长度，迁移率和寿命的显着增加相关。此外，经过处理的设备在85°C的模拟全光谱阳光下在120 h的复合应力下仍能保持较高的性能，这表明钝化处理的增强在苛刻的加速老化条件下得以持续。这是迈向与实际操作相关的钝化处理的关键一步。
更新日期：2020-11-13
中文翻译：
高效高效热转化钝化钙钛矿太阳能电池
尽管金属卤化物钙钛矿光伏电池已显示出功率转换效率（PCE）前所未有的提高，但距离理论PCE极限还很远。当通过“分子钝化”增强多晶膜时，效率是迄今为止最高的，但这会带来新的不稳定性，尤其是在严重的加速老化条件下（例如，在黑暗中的85°C或全光谱模拟阳光下） 。在这里，我们利用苄基溴化铵钝化处理来改善器件性能，从而在引脚上实现了19.5％的冠军稳定输出功率（SPO）设备架构。我们将改善的器件性能与电荷载流子扩散长度，迁移率和寿命的显着增加相关。此外，经过处理的设备在85°C的模拟全光谱阳光下在120 h的复合应力下仍能保持较高的性能，这表明钝化处理的增强在苛刻的加速老化条件下得以持续。这是迈向与实际操作相关的钝化处理的关键一步。
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