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A facile photolithography process enabling pinhole-free thin film photovoltaic modules on soda-lime glass

Giray Kartopu, Ochai Oklobia, T. Tansel, Stephen Jones, Stuart Irvine Orcid Logo

Solar Energy Materials and Solar Cells, Volume: 251, Start page: 112112

Swansea University Authors: Giray Kartopu, Ochai Oklobia, Stephen Jones, Stuart Irvine Orcid Logo

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DOI (Published version): 10.1016/j.solmat.2022.112112

Abstract

Release of the alkaline (mainly sodium) impurities from the soda-lime glass (SLG) substrate can compromise scaling-up of thin film photovoltaic (PV) devices deposited at high temperatures. This does not only degrade electronic device quality but also results in catastrophic effects such as delaminat...

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Published in: Solar Energy Materials and Solar Cells
ISSN: 0927-0248
Published: Elsevier BV 2023
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa62029
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Abstract: Release of the alkaline (mainly sodium) impurities from the soda-lime glass (SLG) substrate can compromise scaling-up of thin film photovoltaic (PV) devices deposited at high temperatures. This does not only degrade electronic device quality but also results in catastrophic effects such as delamination of the semiconductor thin films. Device scale-up can be further hindered by the pinholes that may exist across the large panel areas, causing serious shunt paths. We demonstrate fabrication of uniform CdTe mini-modules on the SLG using a facile photolithography process. This process effectively suppresses sodium release and prevents film delamination from the substrate whilst plugging the pinholes within the semiconductor p-n junction layers. Mini-module devices with repeatable device response are demonstrated using an industrial laser scribing system operating long (microsecond)-pulses of a green laser for thin film scribing.
Keywords: CdTe, PV, module, superstrate, pinhole
College: Faculty of Science and Engineering
Funders: European Regional Development Fund, Solar Photovoltaic Academic Research Consortium (SPARC II, EPSRC, EP/W000555/1, British Council, SIZETSOLAR (Grant no 414178124)
Start Page: 112112

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