Red-Emitting CsPbI3 /ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability

Vighnesh Kunnathodi; Aleksandr A. Sergeev; Md Samim Hassan; Arsenii S. Portniagin; Anastasiia V. Sokolova; Ding Zhu; Kseniia A. Sergeeva; Stephen V. Kershaw; Kam Sing Wong; Andrey L. Rogach

doi:10.1002/smll.202400745

Red-Emitting CsPbI₃ /ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability

Vighnesh Kunnathodi, Aleksandr A. Sergeev, Md Samim Hassan, Arsenii S. Portniagin, Anastasiia V. Sokolova, Ding Zhu, Kseniia A. Sergeeva, Stephen V. Kershaw, Kam Sing Wong, Andrey L. Rogach^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

4 Citations (Scopus)

9 Downloads (CityUHK Scholars)

Abstract

Producing heterostructures of cesium lead halide perovskites and metal-chalcogenides in the form of colloidal nanocrystals can improve their optical features and stability, and also govern the recombination of charge carriers. Herein, the synthesis of red-emitting CsPbI₃/ZnSe nanoheterostructures is reported via an in situ hot injection method, which provides the crystallization conditions for both components, subsequently leading to heteroepitaxial growth. Steady-state absorption and photoluminescence studies alongside X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy analysis evidence on a type-I band alignment for CsPbI₃/ZnSe nanoheterostructures, which exhibit photoluminescence quantum yield of 96% due to the effective passivation of surface defects, and an enhancement in carrier lifetime. Furthermore, the heterostructure growth of ZnSe domains leads to significant improvement in the stability of the CsPbI₃ nanocrystals under ambient conditions and against thermal and UV irradiation stress. © 2024 The Author(s). Small published by Wiley-VCH GmbH.

Original language	English
Article number	2400745
Journal	Small
Volume	20
Issue number	40
Online published	28 May 2024
DOIs	https://doi.org/10.1002/smll.202400745
Publication status	Published - 3 Oct 2024

Funding

Financial support has been provided by the Research Grant Council of Hong Kong SAR (C7035-20G) and the project MHP/068/21 from the Innovation and Technology Fund of Hong Kong SAR. This work utilized the resources of the TRACE Electron Microscopy Centre of City University of Hong Kong; the authors gratefully acknowledge the expert assistance and discussions offered by Zhuo Li and Xiaoyan Zhong.

Research Keywords

heterostructure
improved stability
lead halide perovskite
optical properties
zinc selenide

Publisher's Copyright Statement

This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access Output

10.1002/smll.202400745

227337110.pdfFinal Published version, 1.64 MBLicence: CC BY

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{a0203d8dc6a849e6bdde4ab493236f94,

title = "Red-Emitting CsPbI3 /ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability",

abstract = "Producing heterostructures of cesium lead halide perovskites and metal-chalcogenides in the form of colloidal nanocrystals can improve their optical features and stability, and also govern the recombination of charge carriers. Herein, the synthesis of red-emitting CsPbI3/ZnSe nanoheterostructures is reported via an in situ hot injection method, which provides the crystallization conditions for both components, subsequently leading to heteroepitaxial growth. Steady-state absorption and photoluminescence studies alongside X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy analysis evidence on a type-I band alignment for CsPbI3/ZnSe nanoheterostructures, which exhibit photoluminescence quantum yield of 96% due to the effective passivation of surface defects, and an enhancement in carrier lifetime. Furthermore, the heterostructure growth of ZnSe domains leads to significant improvement in the stability of the CsPbI3 nanocrystals under ambient conditions and against thermal and UV irradiation stress. {\textcopyright} 2024 The Author(s). Small published by Wiley-VCH GmbH.",

keywords = "heterostructure, improved stability, lead halide perovskite, optical properties, zinc selenide",

author = "Vighnesh Kunnathodi and Sergeev, {Aleksandr A.} and Hassan, {Md Samim} and Portniagin, {Arsenii S.} and Sokolova, {Anastasiia V.} and Ding Zhu and Sergeeva, {Kseniia A.} and Kershaw, {Stephen V.} and Wong, {Kam Sing} and Rogach, {Andrey L.}",

year = "2024",

month = oct,

day = "3",

doi = "10.1002/smll.202400745",

language = "English",

volume = "20",

journal = "Small",

issn = "1613-6810",

publisher = "Wiley-VCH Verlag GmbH",

number = "40",

}

TY - JOUR

T1 - Red-Emitting CsPbI3 /ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability

AU - Kunnathodi, Vighnesh

AU - Sergeev, Aleksandr A.

AU - Hassan, Md Samim

AU - Portniagin, Arsenii S.

AU - Sokolova, Anastasiia V.

AU - Zhu, Ding

AU - Sergeeva, Kseniia A.

AU - Kershaw, Stephen V.

AU - Wong, Kam Sing

AU - Rogach, Andrey L.

PY - 2024/10/3

Y1 - 2024/10/3

N2 - Producing heterostructures of cesium lead halide perovskites and metal-chalcogenides in the form of colloidal nanocrystals can improve their optical features and stability, and also govern the recombination of charge carriers. Herein, the synthesis of red-emitting CsPbI3/ZnSe nanoheterostructures is reported via an in situ hot injection method, which provides the crystallization conditions for both components, subsequently leading to heteroepitaxial growth. Steady-state absorption and photoluminescence studies alongside X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy analysis evidence on a type-I band alignment for CsPbI3/ZnSe nanoheterostructures, which exhibit photoluminescence quantum yield of 96% due to the effective passivation of surface defects, and an enhancement in carrier lifetime. Furthermore, the heterostructure growth of ZnSe domains leads to significant improvement in the stability of the CsPbI3 nanocrystals under ambient conditions and against thermal and UV irradiation stress. © 2024 The Author(s). Small published by Wiley-VCH GmbH.

AB - Producing heterostructures of cesium lead halide perovskites and metal-chalcogenides in the form of colloidal nanocrystals can improve their optical features and stability, and also govern the recombination of charge carriers. Herein, the synthesis of red-emitting CsPbI3/ZnSe nanoheterostructures is reported via an in situ hot injection method, which provides the crystallization conditions for both components, subsequently leading to heteroepitaxial growth. Steady-state absorption and photoluminescence studies alongside X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy analysis evidence on a type-I band alignment for CsPbI3/ZnSe nanoheterostructures, which exhibit photoluminescence quantum yield of 96% due to the effective passivation of surface defects, and an enhancement in carrier lifetime. Furthermore, the heterostructure growth of ZnSe domains leads to significant improvement in the stability of the CsPbI3 nanocrystals under ambient conditions and against thermal and UV irradiation stress. © 2024 The Author(s). Small published by Wiley-VCH GmbH.

KW - heterostructure

KW - improved stability

KW - lead halide perovskite

KW - optical properties

KW - zinc selenide

UR - http://www.scopus.com/inward/record.url?scp=85194572329&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85194572329&origin=recordpage

U2 - 10.1002/smll.202400745

DO - 10.1002/smll.202400745

M3 - RGC 21 - Publication in refereed journal

C2 - 38804826

SN - 1613-6810

VL - 20

JO - Small

JF - Small

IS - 40

M1 - 2400745

ER -

Red-Emitting CsPbI₃ /ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability

Abstract

Funding

Research Keywords

Publisher's Copyright Statement

UN SDGs

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

CRF-ExtU-Lead: Low-dimensional Perovskite Materials for Efficient and Stable Light Emitting Diodes: Materials, Devices and Fundamental Understanding

ITF: Core/shell Perovskite Quantum Dots with Excellent Stability and Their Application to Light-emitting Displays

Cite this

Red-Emitting CsPbI3 /ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability

Abstract

Funding

Research Keywords

Publisher's Copyright Statement

UN SDGs

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

CRF-ExtU-Lead: Low-dimensional Perovskite Materials for Efficient and Stable Light Emitting Diodes: Materials, Devices and Fundamental Understanding

ITF: Core/shell Perovskite Quantum Dots with Excellent Stability and Their Application to Light-emitting Displays

Cite this

Red-Emitting CsPbI₃ /ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability