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Title: One-pot synthesis and structural evolution of colloidal cesium lead halide-lead sulfide heterostructure nanocrystals for optoelectronic applications
Authors: Jagadeeswararao, Metikoti
Vashishtha, Parth
Hooper, Thomas J. N.
Kanwat, Anil
Lim, Melvin Jia Wei
Vishwanath, Sujaya Kumar
Yantara, Natalia
Park, Taewook
Sum, Tze Chien
Chung, Dae Sung
Mhaisalkar, Subodh Gautam
Mathews, Nripan
Keywords: Engineering::Materials::Photonics and optoelectronics materials
Issue Date: 2021
Source: Jagadeeswararao, M., Vashishtha, P., Hooper, T. J. N., Kanwat, A., Lim, M. J. W., Vishwanath, S. K., Yantara, N., Park, T., Sum, T. C., Chung, D. S., Mhaisalkar, S. G. & Mathews, N. (2021). One-pot synthesis and structural evolution of colloidal cesium lead halide-lead sulfide heterostructure nanocrystals for optoelectronic applications. Journal of Physical Chemistry Letters, 12(39), 9569-9578.
Project: NRF-CRP14-2014-03 
Journal: Journal of Physical Chemistry Letters 
Abstract: Heterostructures, combining perovskite nanocrystals (PNC) and chalcogenide quantum dots, could pave a path to optoelectronic device applications by enabling absorption in the near-infrared region, tailorable electronic properties, and stable crystal structures. Ideally, the heterostructure host material requires a similar lattice constant as the guest which is also constrained by the synthesis protocol and materials selectivity. Herein, we present an efficient one-pot hot-injection method to synthesize colloidal all-inorganic cesium lead halide-lead sulfide (CsPbX3 (X = Cl, Br, I)-PbS) heterostructure nanocrystals (HNCs) via the epitaxial growth of the perovskite onto the presynthesized PbS nanocrystals (NCs). Optical and structural characterization evidenced the formation of heterostructures. The embedding of PbS NCs into CsPbX3 perovskite allows the tuning of the absorption and emission from 400 to 1100 nm by tuning the size and composition of perovskite HNCs. The CsPbI3-PbS HNCs show enhanced stability in ambient conditions. The stability, tunable optical properties, and variable band alignments accessible in this system would have implications in the design of novel optoelectronic applications such as light-emitting diodes, photodetectors, photocatalysis, and photovoltaics.
ISSN: 1948-7185
DOI: 10.1021/acs.jpclett.1c02915
DOI (Related Dataset): 10.21979/N9/H0WCFJ
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles
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