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Dual-layer synergetic optimization of high-efficiency planar perovskite solar cells using nitrogen-rich nitrogen carbide as an additive
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-09-16 , DOI: 10.1039/d2ta05520a Bo Yu 1 , Huangzhong Yu 1 , Yapeng Sun 1 , Jiankai Zhang 1
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-09-16 , DOI: 10.1039/d2ta05520a Bo Yu 1 , Huangzhong Yu 1 , Yapeng Sun 1 , Jiankai Zhang 1
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Defects and energy-level offsets in distinct functional layers of perovskite solar cells (pero-SCs) are recognized obstacles to achieving their high efficiency and long-term stability. Herein, we report the meticulous design and positioning of nitrogen-rich nitrogen carbide (g-C3N5) as a multifunctional additive to simultaneously optimize the intrinsic defects of a SnO2 electron transport layer (ETL) and perovskite layer for high-performance pero-SCs. The synergistic effect of the favorable band alignment and improved electrical conductivity, obtained by precisely positioning g-C3N5, enables the power conversion efficiency (PCE) of pero-SCs to be increased from 18.05% (g-C3N5-free) to 20.68% and significantly enhances the photo/thermal stability. Moreover, this multiple optimization strategy is also generalized to CsFAMA-based pero-SCs, achieving a champion PCE of 22.34%. Theoretical and experimental analyses further reveal that the incorporating of g-C3N5 regulates the crystalline quality, passivates grain boundary/surface defects and boosts the moisture resistance of photovoltaic devices. This work proves the charming properties and ingenious design of g-C3N5 as a multifunctional material for a variety of optoelectronic devices, including light-emitting diodes, photodetectors, sensors, etc.
中文翻译：
以富氮碳化氮为添加剂的高效平面钙钛矿太阳能电池的双层协同优化
钙钛矿太阳能电池（pero-SCs）不同功能层中的缺陷和能级偏移是实现其高效率和长期稳定性的公认障碍。在此，我们报告了富氮碳化氮 (gC 3 N 5 ) 作为多功能添加剂的精心设计和定位，以同时优化 SnO 2电子传输层 (ETL) 和钙钛矿层的固有缺陷，以实现高性能 pero- SC。通过精确定位gC 3 N 5获得的有利能带排列和提高电导率的协同效应使pero-SCs的功率转换效率（PCE）从18.05%（gC 3 N5 -free) 至 20.68% 并显着提高光/热稳定性。此外，这种多重优化策略也推广到基于 CsFAMA 的 pero-SC，实现了 22.34% 的冠军 PCE。理论和实验分析进一步表明，gC 3 N 5的加入可以调节晶体质量，钝化晶界/表面缺陷并提高光伏器件的耐湿性。这项工作证明了 gC 3 N 5作为一种多功能材料的迷人特性和巧妙的设计，可用于各种光电器件，包括发光二极管、光电探测器、传感器等。
更新日期：2022-09-16
中文翻译：
以富氮碳化氮为添加剂的高效平面钙钛矿太阳能电池的双层协同优化
钙钛矿太阳能电池（pero-SCs）不同功能层中的缺陷和能级偏移是实现其高效率和长期稳定性的公认障碍。在此，我们报告了富氮碳化氮 (gC 3 N 5 ) 作为多功能添加剂的精心设计和定位，以同时优化 SnO 2电子传输层 (ETL) 和钙钛矿层的固有缺陷，以实现高性能 pero- SC。通过精确定位gC 3 N 5获得的有利能带排列和提高电导率的协同效应使pero-SCs的功率转换效率（PCE）从18.05%（gC 3 N5 -free) 至 20.68% 并显着提高光/热稳定性。此外，这种多重优化策略也推广到基于 CsFAMA 的 pero-SC，实现了 22.34% 的冠军 PCE。理论和实验分析进一步表明，gC 3 N 5的加入可以调节晶体质量，钝化晶界/表面缺陷并提高光伏器件的耐湿性。这项工作证明了 gC 3 N 5作为一种多功能材料的迷人特性和巧妙的设计，可用于各种光电器件，包括发光二极管、光电探测器、传感器等。
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