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

Meidan Que; Zhenghong Dai; Hanjun Yang; Hua Zhu; Yingxia Zong; Wenxiu Que; Nitin P. Padture; Yuanyuan Zhou; Ou Chen

doi:10.1021/acsenergylett.9b01262

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

Meidan Que
, Zhenghong Dai
, Hanjun Yang
, Hua Zhu
, Yingxia Zong
, Wenxiu Que
, Nitin P. Padture
, Yuanyuan Zhou
, Ou Chen

电子与信息学部

Xi'an Jiaotong University
Xi'an University of Architecture and Technology
Brown University

科研成果: 期刊稿件 › 文章 › 同行评审

98 引用（Scopus）

摘要

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 Cs_1-xFA_xPbI₃ 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.

源语言	英语
页（从-至）	1970-1975
页数	6
期刊	ACS Energy Letters
卷	4
期	8
DOI	https://doi.org/10.1021/acsenergylett.9b01262
出版状态	已出版 - 9 8月 2019

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10.1021/acsenergylett.9b01262

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title = "Quantum-Dot-Induced Cesium-Rich Surface Imparts Enhanced Stability to Formamidinium Lead Iodide Perovskite Solar Cells",

abstract = "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.",

author = "Meidan Que and Zhenghong Dai and Hanjun Yang and Hua Zhu and Yingxia Zong and Wenxiu Que and Padture, \{Nitin P.\} and Yuanyuan Zhou and Ou Chen",

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T1 - Quantum-Dot-Induced Cesium-Rich Surface Imparts Enhanced Stability to Formamidinium Lead Iodide Perovskite Solar Cells

AU - Que, Meidan

AU - Dai, Zhenghong

AU - Yang, Hanjun

AU - Zhu, Hua

AU - Zong, Yingxia

AU - Que, Wenxiu

AU - Padture, Nitin P.

AU - Zhou, Yuanyuan

AU - Chen, Ou

PY - 2019/8/9

Y1 - 2019/8/9

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85070879015

U2 - 10.1021/acsenergylett.9b01262

DO - 10.1021/acsenergylett.9b01262

M3 - 文章

AN - SCOPUS:85070879015

SN - 2380-8195

VL - 4

SP - 1970

EP - 1975

JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 8

ER -

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

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