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

^*Corresponding author for this work

Research output: Contribution to journal › Journal Article › peer-review

96 Citations (Scopus)

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 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.

Original language	English
Pages (from-to)	1970-1975
Number of pages	6
Journal	ACS Energy Letters
Volume	4
Issue number	8
DOIs	https://doi.org/10.1021/acsenergylett.9b01262
Publication status	Published - 9 Aug 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

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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",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

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day = "9",

doi = "10.1021/acsenergylett.9b01262",

language = "English",

volume = "4",

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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.webofscience.com/wos/woscc/full-record/WOS:000480672800022

UR - https://openalex.org/W2964177688

U2 - 10.1021/acsenergylett.9b01262

DO - 10.1021/acsenergylett.9b01262

M3 - Journal Article

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

Abstract

Bibliographical note

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