Issue 3, 2021

Colloidal BaZrS3 chalcogenide perovskite nanocrystals for thin film device fabrication

Abstract

The theoretical optoelectronic properties of chalcogenide perovskites (e.g., BaZrS3) are as good as those of halide perovskites (e.g., CH3NH3PbI3). But the fabrication of optoelectronic devices is rarely reported, mainly because researchers still do not know how to prepare good quality thin films of chalcogenide perovskites. Here, we report colloidal BaZrS3 nanocrystals (NCs, 40–60 nm) and their solution processed thin film transistors. BaZrS3 NCs are first prepared using a solid-state synthesis route, and the subsequent surface modifications lead to a colloidal dispersion of NCs in both polar N-methyl-2-pyrrolidinone and non-polar chloroform solvents. The NCs exhibit good thermal (15–673 K) and aqueous stability. Colloidal BaZrS3 NCs in chloroform are then used to make field effect transistors showing ambipolar properties with a hole mobility of 0.059 cm2 V−1 s−1 and an electron mobility of 0.017 cm2 V−1 s−1. This report of solution processed chalcogenide perovskite thin films with reasonable carrier mobility and optical absorption and emission is expected to pave the way for future optoelectronic devices of chalcogenide perovskites.

Graphical abstract: Colloidal BaZrS3 chalcogenide perovskite nanocrystals for thin film device fabrication

Supplementary files

Article information

Article type
Communication
Submitted
12 nov 2020
Accepted
22 dez 2020
First published
23 dez 2020

Nanoscale, 2021,13, 1616-1623

Colloidal BaZrS3 chalcogenide perovskite nanocrystals for thin film device fabrication

V. K. Ravi, S. H. Yu, P. K. Rajput, C. Nayak, D. Bhattacharyya, D. S. Chung and A. Nag, Nanoscale, 2021, 13, 1616 DOI: 10.1039/D0NR08078K

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