期刊
ACS APPLIED ENERGY MATERIALS
卷 5, 期 5, 页码 5974-5982出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c00361
关键词
ARC; PDMS; perovskite; silicon; tandem
资金
- Engineering and Physical Sciences Research Council (EPSRC) ICASE studentship [EP/S513714/1]
- EPSRC [EP/N020863/1, EP/T028513/1]
- European Regional Development Fund (ERDF)
Multijunction solar cells have the potential to exceed the efficiency limit of single-junction devices. To reduce optical reflection losses in silicon-perovskite tandem devices, textured anti-reflective coatings (ARCS) such as textured polydimethylsiloxane (PDMS) can be used. This study found that PDMS film can significantly reduce the reflectance of non-textured silicon-perovskite tandem cells and increase the integrated J(SC) by 3-5% in each sub-cell.
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 J(SC) in each sub-cell of a silicon-perovskite tandem structure.
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