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Lookup NU author(s): Dr Yvelin Giret,
Professor Thomas Penfold
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Cu2ZnSnS4 nanocrystals are annealed in a Se-rich atmosphere inside a transmission electron microscope. During the heating phase, a complete S-Se exchange reaction occurs while the cation sublattice and morphology of the nanocrystals are preserved. At the annealing temperature, growth of large Cu2ZnSnSe4 grains with increased cation ordering is observed in real-time. This yields an annealing protocol which is transferred to an industrially-similar solar cell fabrication process resulting in a 33% increase in the device open circuit voltage. The approach can be applied to improve the performance of any photovoltaic technology that requires annealing because of the criticality of the process step.
Author(s): Qu Y, Chee SW, Duchamp M, Campbell S, Zoppi G, Barrioz V, Giret Y, Penfold TJ, Chaturvedi A, Mirsaidov U, Beattie NS
Publication type: Article
Publication status: Published
Journal: ACS Applied Energy Materials
Print publication date: 27/01/2020
Online publication date: 12/12/2019
Acceptance date: 12/12/2019
Date deposited: 18/12/2019
ISSN (electronic): 2574-0962
Publisher: American Chemical Society
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