Role of morphology and crystallinity of nanorod and planar electron transport layers on the performance and long term durability of perovskite solar cells
Role of morphology and crystallinity of nanorod and planar electron transport layers on the performance and long term durability of perovskite solar cells
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DOI：
10.1016/j.jpowsour.2015.02.084
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发表时间：
2015-06-01
影响因子：
9.2
通讯作者：
Jose, Rajan
中科院分区：
文献类型：
--
作者：
Fakharuddin, Azhar;Di Giacomo, Francesco;Jose, Rajan
高效率是常规报道的CH 3 NH3 PbI 3-xClx敏化介观太阳能电池（PSC）采用平面和支架架构，然而，在类似的实验条件下，它们的光伏性能和它们的长期稳定性的系统比较迄今尚未讨论。在本文中，我们比较了采用这两种器件配置的PSC的性能和耐久性，并得出结论，尽管平面架构通常提供高的初始光转换效率（PCE），特别是高开路电压（V-OC），但支架对于实现此类器件的长期耐久性能至关重要。在支架（金红石纳米棒，NR）与平面装置的比较研究中，后者的效率在类似于300小时内下降了一个数量级，尽管它们的类似初始PCE类似于12%。我们比较了两种类型支架的性能和耐久性，原始和TiCl 4处理的NR，并观察到原始NR在类似于1300小时后显示出>10%的PCE改善，而采用后处理的NR支架的细胞保持类似于初始值的60%。我们解决的起源不同的光伏性能的平面和支架设备的背景下，光阳极形态和其对电池的耐久性可能产生的影响。(C)2015 Elsevier B. V.版权所有。
High efficiency is routinely reported in CH3NH3PbI3-xClx sensitized mesoscopic solar cells (PSCs) employing planar and scaffold architectures; however, a systematic comparison of their photovoltaic performance under similar experimental conditions and their long term stability have so far not been discussed. In this paper, we compare the performance and durability of PSCs employing these two device configurations and conclude that although a planar architecture routinely provides high initial photo-conversion efficiency (PCE), particularly high open-circuit voltage (V-OC), a scaffold is crucial to achieve long-term durable performance of such devices. In a comparative study of scaffold (rutile nanorods, NRs) vs. planar devices, the efficiency in latter dropped off by one order of magnitude in similar to 300 h despite their similar initial PCE of similar to 12%. We compared the performance and the durability of two types of scaffolds, i.e., pristine and TiCl4 treated NRs, and observed that the pristine NRs showed >10% improvement in the PCE after similar to 1300 h whereas the cells employing post-treated NR scaffold retained similar to 60% of initial value. We address the origin of the different photovoltaic performance of planar and scaffold devices in the context of photoanode morphology and its possible effect on the cell durability. (C) 2015 Elsevier B.V. All rights reserved.