Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance
Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance
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DOI：
10.1126/science.aah5557
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发表时间：
2016-10-14
期刊：
影响因子：
56.9
通讯作者：
Gratzel, Michael
中科院分区：
文献类型：
--
作者：
Saliba, Michael;Matsui, Taisuke;Gratzel, Michael
目前在钙钛矿太阳能电池中使用的所有阳离子都遵循嵌入晶格的容差因子。我们表明，小且氧化稳定的铷阳离子（Rb⁺）可以嵌入“阳离子级联”中，以制造具有优异材料性能的钙钛矿材料。我们在小面积上实现了高达21.6%（平均值为20.2%）的稳定效率（在面积为0.5平方厘米的电池上稳定效率为19.0%）以及3.8%的电致发光率。在1.63电子伏特的带隙下，1.24伏特的开路电压导致0.39伏特的电势损失，相比之下，商业硅电池的电势损失为0.4伏特。聚合物涂层的电池在85℃下，在全光照和最大功率点跟踪条件下，500小时后仍能保持其初始性能的95%。
All of the cations currently used in perovskite solar cells abide by the tolerance factor for incorporation into the lattice. We show that the small and oxidation-stable rubidium cation (Rb+) can be embedded into a "cation cascade" to create perovskite materials with excellent material properties. We achieved stabilized efficiencies of up to 21.6% (average value, 20.2%) on small areas (and a stabilized 19.0% on a cell 0.5 square centimeters in area) as well as an electroluminescence of 3.8%. The open-circuit voltage of 1.24 volts at a band gap of 1.63 electron volts leads to a loss in potential of 0.39 volts, versus 0.4 volts for commercial silicon cells. Polymer-coated cells maintained 95% of their initial performance at 85 degrees C for 500 hours under full illumination and maximum power point tracking.