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Quantum-Dot-Induced Cesium-Rich Surface Imparts Enhanced Stability to Formamidinium Lead Iodide Perovskite Solar Cells AITranslate

Meidan Que; Zhenghong Dai; Hanjun Yang; Hua Zhu; Yingxia Zong; Wenxiu Que; Nitin P. Padture; Yuanyuan Zhou; Ou Chen;
Brown University; Brown University; Brown University; Brown University; Brown University; Xi’an Jiaotong University; Brown University; Brown University; Brown University
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Abstract AITranslate

The stability of formamidinium lead iodide (FAPbI3) perovskites is generally improved by incorporating cesium (Cs) into the crystal structure. However, the effectiveness of this approach is limited by the intrinsically low solid-solubility of Cs in bulk FAPbI3. To circumvent this issue, we demonstrate a method that entails solution-deposition of high-Cs-content Cs1–xFAxPbI3 alloy quantum dots (QDs) onto a bulk Cs-lean FAPbI3-based thin film. This results in a thin film with a Cs-rich QD surface layer, which stabilizes the thin film against the ambient environment. Stable, efficient perovskite solar cells based on these new thin-film structures are demonstrated.

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DOI：https://doi.org/10.1021/acsenergylett.9b01262

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Citation Information:

The stability of formamidinium lead iodide (FAPbI3) perovskites is generally improved by incorporating cesium (Cs) into the crystal structure. However, the effectiveness of this approach is limited by the intrinsically low solid-solubility of Cs in bulk FAPbI3. To circumvent this issue, we demonstrate a method that entails solution-deposition of high-Cs-content Cs1–xFAxPbI3 alloy quantum dots (QDs) onto a bulk Cs-lean FAPbI3-based thin film. This results in a thin film with a Cs-rich QD surface layer, which stabilizes the thin film against the ambient environment. Stable, efficient perovskite solar cells based on these new thin-film structures are demonstrated.

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GB/T 7714-2015 [1] Meidan Que, Zhenghong Dai, Hanjun Yang, et al. ACS Energy Letters, 2019(4). DOI:10.1021/acsenergylett.9b01262.
MLA [1] Meidan Que, et al., ACS Energy Letters, no. 4, 2019, https://doi.org/10.1021/acsenergylett.9b01262.
APA [1] Meidan Que, Zhenghong Dai, Hanjun Yang, Hua Zhu, Yingxia Zong, Wenxiu Que, Nitin P. Padture, Yuanyuan Zhou, & Ou Chen. (2019). ACS Energy Letters(4). https://doi.org/10.1021/acsenergylett.9b01262
IEEE [1] Meidan Que, Zhenghong Dai, Hanjun Yang, Hua Zhu, Yingxia Zong, Wenxiu Que, Nitin P. Padture, Yuanyuan Zhou, and Ou Chen, ACS Energy Letters, no. 4, 2019, doi: 10.1021/acsenergylett.9b01262.