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

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article number2400745
Number of pages11
Journal / PublicationSmall
Publication statusOnline published - 28 May 2024

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.

Research Area(s)

  • heterostructure, improved stability, lead halide perovskite, optical properties, zinc selenide

Citation Format(s)

Red-Emitting CsPbI3 /ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability. / Kunnathodi, Vighnesh; Sergeev, Aleksandr A.; Hassan, Md Samim et al.
In: Small, 28.05.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review