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A Comparison of Different Textured and Non-Textured Anti-Reflective Coatings for Planar Monolithic Silicon-Perovskite Tandem Solar Cells

Michael Spence, Richard Hammond, Adam Pockett, Zhengfei Wei, Andrew Johnson, Trystan Watson Orcid Logo, Matt Carnie Orcid Logo

ACS Applied Energy Materials, Volume: 5, Issue: 5, Pages: 5974 - 5982

Swansea University Authors: Michael Spence, Adam Pockett, Zhengfei Wei, Trystan Watson Orcid Logo, Matt Carnie Orcid Logo

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DOI (Published version): 10.1021/acsaem.2c00361

Abstract

Multijunction solar cells offer a route to exceed the Shockley–Queisser limit for single-junction devices. In a few short years, silicon-perovskite tandems have significantly passed the efficiency of the best silicon single-junction cells. For scalable solution processing of silicon-perovskite tande...

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Published in: ACS Applied Energy Materials
ISSN: 2574-0962 2574-0962
Published: American Chemical Society (ACS) 2022
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa61009
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Abstract: Multijunction solar cells offer a route to exceed the Shockley–Queisser limit for single-junction devices. In a few short years, silicon-perovskite tandems have significantly passed the efficiency of the best silicon single-junction cells. For scalable solution processing of silicon-perovskite tandem devices, with the avoidance of vacuum processing steps, a flat silicon sub-cell is normally required. This results in a flat top surface that can lead to higher optical reflection losses than conformal deposition on textured silicon bottom cells. To overcome this, textured anti-reflective coatings (ARCs) can be used on top of the finished cell, with textured polydimethylsiloxane (PDMS), a promising candidate. In this work, we vary the texture geometry and film thickness of PDMS anti-reflective foils to understand the effect of these parameters on reflectance of the foil. The best film is selected, and anti-reflective performance is compared with two common planar ARCs─lithium fluoride (LiF) and magnesium fluoride (MgF2) showing considerable reduction in reflectance for a non-textured silicon-perovskite tandem cell. The application of a PDMS film is shown to give a 3–5% increase in integrated JSC in each sub-cell of a silicon-perovskite tandem structure.
College: College of Engineering
Funders: European Regional Development Fund - SPARC II; Engineering and Physical Sciences Research Council - EP/N020863/1, EP/S513714/1, EP/T028513/1
Issue: 5
Start Page: 5974
End Page: 5982