journal article·2019-08-09

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

ACS Energy Letters· Volume 4· Issue 8
Publisher page

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.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Electronic Materials Research Laboratory, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Functional Materials Laboratory, College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an, Shaanxi 710055, China

Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States

School of Engineering, Brown University, Providence, Rhode Island 02912, United States

Funding

Brown University · Office of Naval Research · National Natural Science Foundation of China · National Science Foundation · Brown University IMNI seed program

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