Hao Jiabin, Hao Huiying, Li Jianfeng, Shi Lei, Zhong Tingting, Zhang Chen, Dong Jingjing, Xing Jie, Liu Hao, Zhang Zili
School of Science, China University of Geosciences, Beijing 100083, China.
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.
Nanomaterials (Basel). 2018 Oct 10;8(10):815. doi: 10.3390/nano8100815.
In this contribution, the efficiencies of perovskite solar cells have been further enhanced, based on optical optimization studies. The photovoltaic devices with textured perovskite film can be obtained and a power conversion efficiency (PCE) of the textured fluorine-doped tin oxide (FTO)/Ag nanoparticles (NPs) embedded in c-TiO₂/m-TiO₂/CH₃NH₃PbI₃/Spiro-OMeTAD/Au showed 33.7% enhancement, and a maximum of up to 14.01% was achieved. The efficiency enhancement can be attributed to the light trapping effect caused by the textured FTO and the incorporated Ag NPs, which can enhance scattering to extend the optical pathway in the photoactive layer of the solar cell. Interestingly, aside from enhanced light absorption, the charge transport characteristics of the devices can be improved by optimizing Ag NPs loading levels, which is due to the localized surface plasmon resonance (LSPR) from the incorporated Ag NPs. This light trapping strategy helps to provide an appropriated management for optical optimization of perovskite solar cells.
在本研究中，基于光学优化研究，钙钛矿太阳能电池的效率得到了进一步提高。可以制备具有纹理化钙钛矿薄膜的光电器件，并且嵌入了c-TiO₂/m-TiO₂/CH₃NH₃PbI₃/Spiro-OMeTAD/Au的纹理化氟掺杂氧化锡（FTO）/银纳米颗粒（NPs）的功率转换效率（PCE）提高了33.7%，最高可达14.01%。效率的提高可归因于纹理化FTO和掺入的Ag NPs所引起的光捕获效应，这可以增强散射，从而延长太阳能电池光活性层中的光程。有趣的是，除了增强光吸收外，通过优化Ag NPs的负载水平还可以改善器件的电荷传输特性，这是由于掺入的Ag NPs产生的局域表面等离子体共振（LSPR）。这种光捕获策略有助于为钙钛矿太阳能电池的光学优化提供适当的管理。
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