期刊
ADVANCED MATERIALS
卷 34, 期 40, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202206193
关键词
conformal deposition; fully textured; perovskite solar cells; perovskite; silicon tandem solar cells; production-line compatible
类别
资金
- National Key R&D Program of China [2017YFA0207400]
- National Natural Science Foundation of China [62004027]
- Department of Science and Technology of Sichuan Province [2021ZYD0048]
- Special Program for Sichuan Youth Science and Technology Innovation Research Team [2019JDTD0006]
This study develops a molecular-level nanotechnology to achieve high-performance perovskite/silicon tandem solar cells on fully textured wafer. By using a designed ultrathin hybrid hole transport layer, the cells obtain a certified efficiency of 28.84% on a 1.2 cm(2)masked area, which is the highest performance to date.
Perovskite/silicon tandem solar cells are promising avenues for achieving high-performance photovoltaics with low costs. However, the highest certified efficiency of perovskite/silicon tandem devices based on economically matured silicon heterojunction technology (SHJ) with fully textured wafer is only 25.2% due to incompatibility between the limitation of fabrication technology which is not compatible with the production-line silicon wafer. Here, a molecular-level nanotechnology is developed by designing NiOx/2PACz ([2-(9H-carbazol-9-yl) ethyl]phosphonic acid) as an ultrathin hybrid hole transport layer (HTL) above indium tin oxide (ITO) recombination junction, to serve as a vital pivot for achieving a conformal deposition of high-quality perovskite layer on top. The NiOx interlayer facilitates a uniform self-assembly of 2PACz molecules onto the fully textured surface, thus avoiding direct contact between ITO and perovskite top-cell for a minimal shunt loss. As a result of such interfacial engineering, the fully textured perovskite/silicon tandem cells obtain a certified efficiency of 28.84% on a 1.2-cm(2) masked area, which is the highest performance to date based on the fully textured, production-line compatible SHJ. This work advances commercially promising photovoltaics with high performance and low costs by adopting a meticulously designed HTL/perovskite interface.
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