Perovskite/Silicon Tandem Solar Cells with a V_oc of 1784 mV Based on an Industrially Feasible 25 cm² TOPCon Silicon Cell

Abstract

Perovskite-based tandem solar cells are promising candidates for industrial applications. This study demonstrated perovskite/silicon tandem devices based on a conventional Si homojunction device configuration employing a tunnel oxide passivating contact to improve the voltage. Moreover, we fabricated it without the deposition of a recombination layer on a large area while showing the possibility of applying the industry market. This solar cell exhibited a power conversion efficiency of 17.3% and a high voltage of 1783 mV on a 25 cm2 active area.

Titanium Silicide: A Promising Candidate of Recombination Layer for Perovskite/Tunnel Oxide Passivated Contact Silicon Two-Terminal Tandem Solar Cells

“…Various studies have reported the formation of a thermodynamically stable thin SiO X layer at the interface while depositing oxide-based materials. , Based on the images, the TiSi 2 layer can be clearly distinguished for initial Ti layers thicker than 25 nm. As the initial Ti layer thickness increased, the TiSi 2 thickness also increased, whereas that of SiO X remained nearly constant.…”

“…The concept of multijunction or tandem solar cells has been proposed to overcome the theoretical efficiency limits of single-junction solar cells. − As two or more absorber layers are stacked, it is possible to absorb and utilize a broader range of the solar spectrum. Among the various multijunction solar cells, a double-junction (or two-terminal, 2-T) solar cell combining silicon (Si) and perovskite is one of the most promising photovoltaic (PV) technologies. − As Si solar cells have been already commercialized, advanced Si technology and existing manufacturing lines can facilitate the commercialization of tandem solar cells. Perovskite solar cells are attracting attention as a partner of Si, owing to its band gap tunability, high absorption coefficient, high efficiency, and easy fabrication .…”

Systematic evaluation of the biotoxicity of Pb-based perovskite materials and perovskite solar cells

“…17 Concerning actual production and application, large-area single-junction PSC modules and tandem solar cells, which most of them are based on Pb perovskite materials, have been manufactured not only in the lab but also in the factory via scalable coating methods. 18–21 Besides, stability is important for the commercial application of PSCs, which has been significantly improved in recent years. 6,22 A part of Pb-based PSCs maintained >95% of their initial PCEs after 1000 h under high temperature, continuous light, high humidity conditions, or maximum power point.…”

First Demonstration of Top Contact-Free Perovskite/Silicon Two-Terminal Tandem Solar Cells for Overcoming the Current Density Hurdle

“…This makes it possible to absorb and utilize a broader range of the solar spectrum. For double-junction solar cells using two light absorber layers, the theoretical efficiency can be increased up to 46% when materials with optimized band gaps are used for the top/bottom subcells. , Among various multijunction solar cells, perovskite/silicon two-terminal (2-T) tandem solar cells are most actively studied today; − while silicon solar cells have already been commercialized, perovskite solar cells are attracting attention as a next-generation technology that offers band gap tunability, easy fabrication, high absorption coefficient, and high efficiency . Owing to active research, perovskite/silicon 2-T tandem solar cells have shown more than a 2-fold efficiency increase, from 13.7% in 2015 to 31.25% in 2022 (EPFL/CSEM).…”