SKM 2021 – scientific programme

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AKE: Arbeitskreis Energie

AKE 2: Technologien für die Energiewende und ihre Implikationen I

AKE 2.2: Invited Talk

Monday, September 27, 2021, 15:15–15:45, H8

Highly Efficient Monolithic Tandem Devices with Perovskite Top Cells — •Steve Albrecht — Helmholtz-Center Berlin, Young Investigator Group Perovskite Tandem Solar Cells

Integrating metal halide perovskite top cells with crystalline silicon or CIGS bottom cells into monolithic tandem devices has recently attracted increased attention due to the high efficiency potential of these cell architectures. To further increase the tandem device performance to a level well above the best single junctions, optical and electrical optimizations as well as a detailed device understanding of this advanced tandem architecture need to be developed. In this talk, Prof. Albrecht will present the recent results on monolithic tandem combinations of perovskite with crystalline silicon and CIGS, as well as tandem relevant aspects of perovskite single junction solar cells. Finally, it will be shown how utilization of a self-assembled molecular monolayer (SAM) and fine tuning of the perovskite band gap in perovskite/silicon tandem solar cells further improved the efficiency to 27.5% and to 23.3% for perovskite/CIGS tandems, the latter being a certified world record efficiency.