Facile purification of CsPbX3 (X = Cl-, Br-, I-) perovskite nanocrystals

Chujie Wang, Anthony S.R. Chesman, Wenping Yin, Laszlo Frazer, Alison M. Funston, Jacek J. Jasieniak

Research output: Contribution to journalArticleResearchpeer-review

Abstract

CsPbI3 perovskite nanocrystals are a promising optoelectronic material when stabilized in their cubic phase. While ongoing efforts have addressed this structural challenge through a variety of meta-stabilization approaches, the postsynthesis purification of these nanocrystal dispersions has remained a challenge. In this article, we undertake a detailed investigation into the chemical, optical, and structural changes that arise during purification of CsPbI3 nanocrystals. It is found that nanocrystal degradation can only be avoided through the judicious control of additives within each purification cycle. Under optimized additive-to-nanocrystal ratios, multiple purification cycles can be readily achieved, while retaining the quality and phase stability of the CsPbI3. This facile purification protocol ensures the preparation of high purity and high quality CsPbI3 nanocrystal inks that are suitable for better characterization or integration in optoelectronic devices. The approach has been generalized for CsPbX3 (X = Cl−, Br−, and I−).
Original languageEnglish
Article number121105
Number of pages7
JournalJournal of Chemical Physics
Volume151
Issue number12
DOIs
Publication statusPublished - 30 Sep 2019

Cite this

@article{db4d3eb7f9464ae4b0f2d7e31f2f4a5e,
title = "Facile purification of CsPbX3 (X = Cl-, Br-, I-) perovskite nanocrystals",
abstract = "CsPbI3 perovskite nanocrystals are a promising optoelectronic material when stabilized in their cubic phase. While ongoing efforts have addressed this structural challenge through a variety of meta-stabilization approaches, the postsynthesis purification of these nanocrystal dispersions has remained a challenge. In this article, we undertake a detailed investigation into the chemical, optical, and structural changes that arise during purification of CsPbI3 nanocrystals. It is found that nanocrystal degradation can only be avoided through the judicious control of additives within each purification cycle. Under optimized additive-to-nanocrystal ratios, multiple purification cycles can be readily achieved, while retaining the quality and phase stability of the CsPbI3. This facile purification protocol ensures the preparation of high purity and high quality CsPbI3 nanocrystal inks that are suitable for better characterization or integration in optoelectronic devices. The approach has been generalized for CsPbX3 (X = Cl−, Br−, and I−).",
author = "Chujie Wang and Chesman, {Anthony S.R.} and Wenping Yin and Laszlo Frazer and Funston, {Alison M.} and Jasieniak, {Jacek J.}",
year = "2019",
month = "9",
day = "30",
doi = "10.1063/1.5123306",
language = "English",
volume = "151",
journal = "Journal of Chemical Physics",
issn = "0021-9606",
publisher = "AIP",
number = "12",

}

Facile purification of CsPbX3 (X = Cl-, Br-, I-) perovskite nanocrystals. / Wang, Chujie; Chesman, Anthony S.R.; Yin, Wenping; Frazer, Laszlo; Funston, Alison M.; Jasieniak, Jacek J.

In: Journal of Chemical Physics, Vol. 151, No. 12, 121105, 30.09.2019.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Facile purification of CsPbX3 (X = Cl-, Br-, I-) perovskite nanocrystals

AU - Wang, Chujie

AU - Chesman, Anthony S.R.

AU - Yin, Wenping

AU - Frazer, Laszlo

AU - Funston, Alison M.

AU - Jasieniak, Jacek J.

PY - 2019/9/30

Y1 - 2019/9/30

N2 - CsPbI3 perovskite nanocrystals are a promising optoelectronic material when stabilized in their cubic phase. While ongoing efforts have addressed this structural challenge through a variety of meta-stabilization approaches, the postsynthesis purification of these nanocrystal dispersions has remained a challenge. In this article, we undertake a detailed investigation into the chemical, optical, and structural changes that arise during purification of CsPbI3 nanocrystals. It is found that nanocrystal degradation can only be avoided through the judicious control of additives within each purification cycle. Under optimized additive-to-nanocrystal ratios, multiple purification cycles can be readily achieved, while retaining the quality and phase stability of the CsPbI3. This facile purification protocol ensures the preparation of high purity and high quality CsPbI3 nanocrystal inks that are suitable for better characterization or integration in optoelectronic devices. The approach has been generalized for CsPbX3 (X = Cl−, Br−, and I−).

AB - CsPbI3 perovskite nanocrystals are a promising optoelectronic material when stabilized in their cubic phase. While ongoing efforts have addressed this structural challenge through a variety of meta-stabilization approaches, the postsynthesis purification of these nanocrystal dispersions has remained a challenge. In this article, we undertake a detailed investigation into the chemical, optical, and structural changes that arise during purification of CsPbI3 nanocrystals. It is found that nanocrystal degradation can only be avoided through the judicious control of additives within each purification cycle. Under optimized additive-to-nanocrystal ratios, multiple purification cycles can be readily achieved, while retaining the quality and phase stability of the CsPbI3. This facile purification protocol ensures the preparation of high purity and high quality CsPbI3 nanocrystal inks that are suitable for better characterization or integration in optoelectronic devices. The approach has been generalized for CsPbX3 (X = Cl−, Br−, and I−).

U2 - 10.1063/1.5123306

DO - 10.1063/1.5123306

M3 - Article

VL - 151

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

IS - 12

M1 - 121105

ER -