Synergetic substrate and additive engineering for over 30% efficient perovskite Si tandem solar cells
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Author
Turkay, Deniz
Artuk, Kerem
Chin, Xin-Yu
Jacobs, Daniel A
Moon, Soo-Jin
Walter, Arnaud
Mensi, Mounir
Andreatta, Gaëlle
Blondiaux, Nicolas
Lai, Hua gui
DOI
10.1016/j.joule.2024.04.015
Abstract
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 30G
1%, and a certified maximum of 30.9% are achieved.
Publication Reference
Joule, vol 8 (6), pp. 1735-1753
Year
2024-06-19