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Proceedings Paper

Enhanced photoluminescence properties and increased long-term stability of zero-dimensional cesium lead bromide nanocrystals via gas-phase alumina oxide encapsulation (Conference Presentation)
Author(s): Anton V. Malko

Paper Abstract

Cs-based perovskite nanocrystals (PNCs) possess alluring optoelectronic properties through compositional and structural versatility, tunable bandgap, high photoluminescence (PL) quantum yield (QY) and facile chemical synthesis. However, PL properties of solid-state samples suffer from environmental and operational degradation. Here we report alumina (AlOx) encapsulation of 0D Cs4PbBr6 nanocrystal thin films and individual nanoparticles using a modified atomic layer deposition (ALD) method with concurrent exposure of both Al and water precursors in the gas flow. We observed stronger PL intensity, increased PL lifetimes and much improved long-term stability at both film and single PNC level. These findings provide roadmap for ALD utilization to create solid-state perovskite devices.

Paper Details

Date Published: 9 March 2020
Proc. SPIE 11269, Synthesis and Photonics of Nanoscale Materials XVII, 112690D (9 March 2020); doi: 10.1117/12.2551443
Show Author Affiliations
Anton V. Malko, The Univ. of Texas at Dallas (United States)

Published in SPIE Proceedings Vol. 11269:
Synthesis and Photonics of Nanoscale Materials XVII
Jan J. Dubowski; David B. Geohegan; Andrei V. Kabashin, Editor(s)

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