Efficient and ultraviolet durable planar perovskite solar cells via a ferrocenecarboxylic acid modified nickel oxide hole transport layer.
Efficient and ultraviolet durable planar perovskite solar cells via a ferrocenecarboxylic acid modified nickel oxide hole transport layer.
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DOI：
10.1039/c7nr08750k
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发表时间：
2018-03
期刊：
影响因子：
6.7
通讯作者：
Jiankai Zhang;Hui Luo;Weijia Xie;Xuanhuai Lin;Xianhua Hou;Jian-ping Zhou;Sumei Huang;Ou-Yang Wei-Ou-Yan
中科院分区：
文献类型：
--
作者：
Jiankai Zhang;Hui Luo;Weijia Xie;Xuanhuai Lin;Xianhua Hou;Jian-ping Zhou;Sumei Huang;Ou-Yang Wei-Ou-Yan
使用氧化镍（NiOx）作为空穴传输层的平面钙钛矿太阳能电池（PSC）由于其优异的光伏效率和简单的制造而最近引起了极大的关注。然而，对于在相对低的退火温度下制造的NiOx层，NiOx的电导率和NiOx/钙钛矿层的界面接触性质总是受限的。首次将二茂铁二甲酸（FDA）引入到PSCs中的p型NiOx空穴传输层的改性中，明显改善了钙钛矿层的结晶性，提高了空穴传输和收集能力，减少了载流子复合。具有FDA改性的NiOx层的PSC达到18.20%的PCE，这远高于参考PSC的PCE（15.13%）。此外，具有FDA界面改性层的PSC显示出更好的UV耐久性和无光致变色效果，并且在UV暴露24 h后仍保持原始PCE值49.8%。PSC的增强的性能归因于钙钛矿层的更好的结晶、FDA的钝化效应、NiO/钙钛矿层处的上级界面接触以及FDA改性的NiO层的导电性的增强。此外，在钙钛矿/PCBM层的界面处插入FDA的PSC也可以将PCE提高到16.62%，表明FDA具有修饰p型和n型载流子传输层的双重功能。
Planar perovskite solar cells (PSCs) that use nickel oxide (NiOx) as a hole transport layer have recently attracted tremendous attention because of their excellent photovoltaic efficiencies and simple fabrication. However, the electrical conductivity of NiOx and the interface contact properties of the NiOx/perovskite layer are always limited for the NiOx layer fabricated at a relatively low annealing temperature. Ferrocenedicarboxylic acid (FDA) was firstly introduced to modify a p-type NiOx hole transport layer in PSCs, which obviously improves the crystallization of the perovskite layer and hole transport and collection abilities and reduces carrier recombination. PSCs with a FDA modified NiOx layer reached a PCE of 18.20%, which is much higher than the PCE (15.13%) of reference PSCs. Furthermore, PSCs with a FDA interfacial modification layer show better UV durability and a hysteresis-free effect and still maintain the original PCE value of 49.8%after being exposed to UV for 24 h. The enhanced performance of the PSCs is attributed to better crystallization of the perovskite layer, the passivation effect of FDA, superior interface contact at the NiOx/perovskite layers and enhancement of the electrical conductivity of the FDA modified NiOx layer. In addition, PSCs with FDA inserted at the interface of the perovskite/PCBM layers can also improve the PCE to 16.62%, indicating that FDA have dual functions to modify p-type and n-type carrier transporting layers.