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Thesis
Home   /   Thesis   /   Perovskite materials: influence of nanocrystallization processes on the performances of PK cells for tandem integration

Perovskite materials: influence of nanocrystallization processes on the performances of PK cells for tandem integration

Abstract

After several decades of intense development, silicon-based PV is a well-established and mature technology that now nears its practical efficiency limit. One strategy to overcome this limit is to use multi-junctions solar cells coupling a silicon subcell with a topcell based on a higher band gap absorber (1,6 - 1,7 eV vs 1.12 eV for silicon) exhibiting high efficiency. Lead halide perovskites (with ABX3 structure) can fulfill these requirements. Such materials can be integrated via solution processing at low temperature and yield theoretical efficiencies well beyond 30% when combined in a tandem device with a silicon subcell.

To this end, controlling perovskite crystallization from precursors solution is obviously of prime importance. Also, the development of upscalable techniques to process the perovskite is one of the main practical challenge still to be met to ensure a practical deployment of the technology. The strategy currently developed within CEA relies on a gas-quenching of the precursors wet film to trigger perovskite crystallization.

The main goal of this PhD will be to study in-depth the perovskite crystallization when processed in such conditions, to pave the way towards successful integration in tandem devices.

Laboratory

Département des Technologies Solaires (LITEN)
Service des Cellules PV Premium
Laboratoire des Cellules Tandem
Université Grenoble Alpes
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