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Journal of Nanoparticle Research

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01-05-2019 | Research Paper

Nondestructive purification process for inorganic perovskite quantum dot solar cells

Authors: Tonghui Yang, Zhe Zhang, Yanli Ding, Naiqiang Yin, Xiaolan Liu

Published in: Journal of Nanoparticle Research | Issue 5/2019

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Abstract

Lead halide perovskites have attracted much attention following their successful use in photovoltaic devices with impressive power-conversion efficiencies. Owing to perovskite quantum dots’ ionic nature, the surface ligands are easy to be overdamaged in polar solvents. Thus, there have been some difficulties in protecting the surface ligands of the quantum dots during purification processes, especially in solvent reprecipitation techniques. Here, we used mixtures of ethyl acetate and methyl acetate during the purification process to precipitate perovskite quantum dots that showed scarcely any damage to their surface ligands; furthermore, these purified CsPbBr₃ quantum dots displayed high performances in devices. Quantum dot films were prepared via spin-coating from solution for use in solar cells with a simple structure (indium tin oxide/ZnO/quantum dots/Au), which displayed power-conversion efficiencies of up to 2.43%. Multiple purification cycles of this purification process allowed us to obtain near-perfectly modified perovskite colloidal quantum dots, ideal for application in optoelectronic devices.

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Title: Nondestructive purification process for inorganic perovskite quantum dot solar cells
Authors: Tonghui Yang
Zhe Zhang
Yanli Ding
Naiqiang Yin
Xiaolan Liu
Publication date: 01-05-2019
Publisher: Springer Netherlands
Published in: Journal of Nanoparticle Research / Issue 5/2019
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-019-4545-y

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