Mixed-Organic-Cation Perovskite Photovoltaics for Enhanced Solar-Light Harvesting
Mixed-Organic-Cation Perovskite Photovoltaics for Enhanced Solar-Light Harvesting
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DOI：
10.1002/anie.201309361
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发表时间：
2014-03-17
影响因子：
16.6
通讯作者：
Graetzel, Michael
中科院分区：
文献类型：
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作者：
Pellet, Norman;Gao, Peng;Graetzel, Michael
混合有机-无机卤化铅钙钛矿APbX（3）颜料，例如甲基铵碘化铅，最近已经成为固态介观太阳能电池中的优异光收集器。进一步改善钙钛矿基光致发光材料性能的一个重要目标是将其光吸收起始进一步扩展到红色以增强太阳光捕获。在本文中，我们表明，这一目标可以通过在APbI（3）钙钛矿结构的A位使用甲脒鎓（HN= CHNH 3+，FA）和甲基铵（CH 3 NH3+，MA）阳离子的混合物来实现。这种组合导致增强的短路电流，从而导致比仅基于CH 3 NH 3+的那些器件更优越的器件上级。这个概念以前没有应用在钙钛矿基太阳能电池中。它显示出巨大的潜力，作为一个多功能的工具来调整的结构，电气和光电性能的光捕获材料。
Hybrid organic-inorganic lead halide perovskite APbX(3) pigments, such as methylammonium lead iodide, have recently emerged as excellent light harvesters in solid-state mesoscopic solar cells. An important target for the further improvement of the performance of perovskite-based photovoltaics is to extend their optical-absorption onset further into the red to enhance solar-light harvesting. Herein, we show that this goal can be reached by using a mixture of formamidinium (HN=CHNH3+, FA) and methylammonium (CH3NH3+, MA) cations in the Aposition of the APbI(3) perovskite structure. This combination leads to an enhanced short-circuit current and thus superior devices to those based on only CH3NH3+. This concept has not been applied previously in perovskite-based solar cells. It shows great potential as a versatile tool to tune the structural, electrical, and optoelectronic properties of the light-harvesting materials.