High voltage vacuum-deposited CH3NH3PbI3-CH3NH3PbI3 tandem solar cells
High voltage vacuum-deposited CH3NH3PbI3-CH3NH3PbI3 tandem solar cells
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DOI：
10.1039/c8ee01936c
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发表时间：
2018-11-01
影响因子：
32.5
通讯作者：
Bolink, Henk J.
中科院分区：
文献类型：
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作者：
Avila, Jorge;Momblona, Cristina;Bolink, Henk J.
钙钛矿太阳能电池最近的成功基于两个坚实的支柱：其功率转换效率的快速进步以及其在光电特性和加工方法方面的灵活性。这种多功能性使这些器件成为多结光致发光器件的理想候选者。我们报道了一种光学优化的双结CH 3 NH3 PbI 3-CH 3 NH3 PbI 3串联太阳能电池，其中匹配的短路电流最大化，同时寄生吸收最小化。添加剂真空沉积协议的使用使我们能够重现计算的堆栈设计，其中包括几个电荷选择性材料，确保适当的能带对准和电荷重组。这种合理化的配置产生了前所未有的2.30 V的开路电压。此外，这种串联太阳能电池的效率大于18%，高于单个子电池的效率。低光电流值允许减少与透明触点的串联电阻相关联的损耗，这为实现高效的大面积模块打开了大门。
The recent success of perovskite solar cells is based on two solid pillars: the rapid progress of their power conversion efficiency and their flexibility in terms of optoelectrical properties and processing methods. That versatility makes these devices ideal candidates for multi-junction photovoltaics. We report an optically optimized double junction CH3NH3PbI3-CH3NH3PbI3 tandem solar cell where the matched short-circuit current is maximized while parasitic absorption is minimized. The use of an additive vacuum-deposition protocol allows us to reproduce calculated stack designs, which comprise several charge selective materials that ensure appropriate band alignment and charge recombination. This rationalized configuration yields an unprecedented open circuit voltage of 2.30 V. Furthermore, this tandem solar cell features efficiencies larger than 18%, higher than those of the individual sub-cells. Low photo-current values allow reducing the losses associated to the series resistance of transparent contacts, which opens the door to the realization of efficient large area modules.