Thin single crystal perovskite solar cells to harvest below-bandgap light absorption.
Thin single crystal perovskite solar cells to harvest below-bandgap light absorption.
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DOI：
10.1038/s41467-017-02039-5
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发表时间：
2017-12-01
影响因子：
16.6
通讯作者：
Huang J
中科院分区：
文献类型：
--
作者：
Chen Z;Dong Q;Liu Y;Bao C;Fang Y;Lin Y;Tang S;Wang Q;Xiao X;Bai Y;Deng Y;Huang J
在过去的几年里，钙钛矿太阳能电池的效率激增，而目前的钙钛矿材料记录效率的带隙远远大于最佳值，这使得效率远远低于Shockley-Queisser效率极限。利用钙钛矿型单晶的带隙以下吸收，可以在不改变晶体成分的情况下，使其有效光学带隙变窄。采用疏水界面限制侧向生长方法，在空穴传输层覆盖的衬底上直接生长了厚度可调几十微米的甲基铵三碘化铅单晶。甲基铵三碘化铅单晶太阳电池的光谱响应扩展到820 nm，比相应的多晶薄膜太阳电池宽20 nm。在不牺牲开路电压和填充因子的情况下，单晶钙钛矿太阳电池的效率为17.8%。卤化物钙钛矿薄膜在太阳能电池技术中是很有前途的，但由于光吸收低，在带边表现不佳。在本文中，Chen等人提出了一种新的方法。制作效率较高的单晶钙钛矿型太阳能电池，利用较厚的单晶获得带隙以下光子。
The efficiency of perovskite solar cells has surged in the past few years, while the bandgaps of current perovskite materials for record efficiencies are much larger than the optimal value, which makes the efficiency far lower than the Shockley–Queisser efficiency limit. Here we show that utilizing the below-bandgap absorption of perovskite single crystals can narrow down their effective optical bandgap without changing the composition. Thin methylammonium lead triiodide single crystals with tuned thickness of tens of micrometers are directly grown on hole-transport-layer covered substrates by a hydrophobic interface confined lateral crystal growth method. The spectral response of the methylammonium lead triiodide single crystal solar cells is extended to 820 nm, 20 nm broader than the corresponding polycrystalline thin-film solar cells. The open-circuit voltage and fill factor are not sacrificed, resulting in an efficiency of 17.8% for single crystal perovskite solar cells. Thin films of halide perovskites are promising for solar cell technology but they do not perform well at the band edge due to the low optical absorption. Herein, Chen et al. fabricate a high efficiency single crystal perovskite solar cell with thicker single crystals to harvest the below-bandgap photons.
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影响因子：
29.4
作者：
Dong, Qingfeng;Song, Jingfeng;Huang, Jinsong
通讯作者：
Huang, Jinsong
影响因子：
56.9
作者：
Chen, Wei;Wu, Yongzhen;Han, Liyuan
通讯作者：
Han, Liyuan
影响因子：
5.7
作者：
De Wolf, Stefaan;Holovsky, Jakub;Ballif, Christophe
通讯作者：
Ballif, Christophe
影响因子：
3.9
作者：
Sendner, Christian;Horinek, Dominik;Netz, Roland R.
通讯作者：
Netz, Roland R.
影响因子：
16.6
作者：
Bi C;Wang Q;Shao Y;Yuan Y;Xiao Z;Huang J
通讯作者：
Huang J