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CsPbI3/PbSe Heterostructured Nanocrystals for High-Efficiency Solar Cells
ACS Energy Letters ( IF 22.0 ) Pub Date : 2020-06-30 , DOI: 10.1021/acsenergylett.0c01222 Shixun Wang 1 , Chenghao Bi 2 , Arsenii Portniagin 1 , Jifeng Yuan 2 , Jiajia Ning 1 , Xufen Xiao 1 , Xiaoyu Zhang 3 , Yang Yang Li 1 , Stephen V. Kershaw 1 , Jianjun Tian 2 , Andrey L. Rogach 1
ACS Energy Letters ( IF 22.0 ) Pub Date : 2020-06-30 , DOI: 10.1021/acsenergylett.0c01222 Shixun Wang 1 , Chenghao Bi 2 , Arsenii Portniagin 1 , Jifeng Yuan 2 , Jiajia Ning 1 , Xufen Xiao 1 , Xiaoyu Zhang 3 , Yang Yang Li 1 , Stephen V. Kershaw 1 , Jianjun Tian 2 , Andrey L. Rogach 1
Affiliation
Colloidal cesium lead iodide (CsPbI3) perovskite quantum dots (QDs) are promising materials for solar cells because of their suitable optical bandgap and the ease of solution-based processing into large-area films. Herein, we report a synthetic strategy to build up a colloidal CsPbI3/PbSe heterostructure, which not only improves the absorption of sunlight but also passivates the surface of perovskite QDs, which results in a lower trap density and prolonged exciton lifetimes. Moreover, the presence of the PbSe component modifies the electronic properties of the composite films, by changing the CsPbI3 QD film from n-type to more ambipolar behavior, thus helping to promote carrier separation and collection. These improvements result in high-performance CsPbI3/PbSe QD solar cells with a power conversion efficiency of 13.9% and improved storage stability against moisture, benefiting from the hydrophobic protective coating resulting from the presence of PbSe component.
中文翻译:
用于高效太阳能电池的CsPbI 3 / PbSe异质结构纳米晶体
胶态碘化铯碘化铅(CsPbI 3)钙钛矿量子点(QDs)是太阳能电池的有前途的材料,因为它们具有合适的光学带隙并且易于基于溶液的加工成大面积薄膜。在本文中,我们报告了建立胶体CsPbI 3 / PbSe异质结构的合成策略,该结构不仅提高了对阳光的吸收,而且钝化了钙钛矿QDs的表面,从而降低了陷阱密度并延长了激子寿命。此外,PbSe组分的存在通过将CsPbI 3 QD膜从n型改变为更双极性的行为而改变了复合膜的电子性能,从而有助于促进载流子的分离和收集。这些改进产生了高性能的CsPbI3 / PbSe QD太阳能电池具有13.9%的功率转换效率,并提高了抗湿气的存储稳定性,这得益于PbSe组分的存在产生的疏水性保护涂层。
更新日期:2020-07-10
中文翻译:
用于高效太阳能电池的CsPbI 3 / PbSe异质结构纳米晶体
胶态碘化铯碘化铅(CsPbI 3)钙钛矿量子点(QDs)是太阳能电池的有前途的材料,因为它们具有合适的光学带隙并且易于基于溶液的加工成大面积薄膜。在本文中,我们报告了建立胶体CsPbI 3 / PbSe异质结构的合成策略,该结构不仅提高了对阳光的吸收,而且钝化了钙钛矿QDs的表面,从而降低了陷阱密度并延长了激子寿命。此外,PbSe组分的存在通过将CsPbI 3 QD膜从n型改变为更双极性的行为而改变了复合膜的电子性能,从而有助于促进载流子的分离和收集。这些改进产生了高性能的CsPbI3 / PbSe QD太阳能电池具有13.9%的功率转换效率,并提高了抗湿气的存储稳定性,这得益于PbSe组分的存在产生的疏水性保护涂层。