Paper alert - over 30%-efficient perovskite-Si(front-flat) tandems!
© 2024 Joule
PV-Lab is happy to share that our latest paper "Synergetic substrate and additive engineering for over 30%-efficient perovskite-Si tandem solar cells" has been published in Joule! The 30.9% certified solar cell, was also the first worldwide to be certified over 30% using a flat front silicon wafer!
PV-Lab is happy to share that our latest paper "Synergetic substrate and additive engineering for over 30%-efficient perovskite-Si tandem solar cells" has been published in Joule!
A big thanks to all the co-authors Deniz Turkay*, Kerem Artuk*, Xin-Yu Chin, Daniel A. Jacobs, Soo-Jin Moon, Arnaud Walter, Mounir Mensi, Gaelle Andreatta, Nicolas Blondiaux, Huagui Lai, Fan Fu, Mathieu Boccard, Quentin Jeangros, Christian M. Wolff*, and Christophe Ballif for the fruitful collaboration!
Highlights from the article;
''Perovskite-silicon (Si) tandem solar cells are the most prominent contenders to succeed single-junction Si cells that dominate the market today. Yet, to justify the added cost of inserting a perovskite cell on top of Si, these devices should first exhibit sufficiently high power conversion efficiencies (PCEs). Here, we present two key developments with a synergetic effect that boost the PCEs of our tandem devices with front-side flat Si wafers—the use of 2,3,4,5,6-pentafluorobenzylphosphonic acid (pFBPA) in the perovskite precursor ink that suppresses recombination near the perovskite/C60 interface and the use of SiO2 nanoparticles under the perovskite film that suppresses the enhanced number of pinholes and shunts introduced by pFBPA, while also allowing reliable use of Me-4PACz as a hole transport layer. Integrating these developments in an optically and electrically optimized tandem device (e.g., with a durable Si cell), reproducible PCEs of 30 ± 1%, and a certified maximum of 30.9% are achieved.''
The authors acknowledge funding from the European Union’s Horizon 2020 research and innovation program (VIPERLAB, 101006715; TRIUMPH, 101075725), the Swiss National Science Foundation (PAPET, 200021_197006; A3P, 40B2-0_1203626), the Swiss Federal Office of Energy (PRESTO), and the ETH Domain through an AM grant (AMYS). D.T. acknowledges funding from the European Union’s Horizon 2020 research and innovation program under a Marie Skłodowska-Curie grant (945363). D.T. thanks the Swiss State Secretariat for Education, Research and Innovation, SERI, for support via an FCS/ESKAS Swiss Government Excellence Scholarship.