Science· 2016Q1
A mixed-cation lead mixed-halide perovskite absorber for tandem solar cells
- 3,029citations
- Q1SCImago
- 2016year
Short summary
A novel mixed-cation lead mixed-halide perovskite absorber, [HC(NH2)2](0.83)Cs(0.17)Pb(I(0.6)Br(0.4))3, achieves a ~1.74 eV band gap and over 17% power conversion efficiency in small-area cells, enabling >25% efficient four-terminal tandem solar cells when combined with silicon.
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Key points
- Developed a new perovskite absorber: [HC(NH2)2](0.83)Cs(0.17)Pb(I(0.6)Br(0.4))3.
- Achieved a ~1.74 eV optical band gap, ideal for tandem solar cells.
- Demonstrated high power conversion efficiencies: >17% (small area) and 14.7% (0.715 cm(2)).
- Enabled >25% efficiency in four-terminal tandem cells by combining with silicon.
AI-generated from the title and abstract; the full text is not read.
Abstract
Metal halide perovskite photovoltaic cells could potentially boost the efficiency of commercial silicon photovoltaic modules from ∼20 toward 30% when used in tandem architectures. An optimum perovskite cell optical band gap of ~1.75 electron volts (eV) can be achieved by varying halide composition, but to date, such materials have had poor photostability and thermal stability. Here we present a highly crystalline and compositionally photostable material, [HC(NH2)2](0.83)Cs(0.17)Pb(I(0.6)Br(0.4))3, with an optical band gap of ~1.74 eV, and we fabricated perovskite cells that reached open-circuit voltages of 1.2 volts and power conversion efficiency of over 17% on small areas and 14.7% on 0.715 cm(2) cells. By combining these perovskite cells with a 19%-efficient silicon cell, we demonstrated the feasibility of achieving >25%-efficient four-terminal tandem cells.
The authors' abstract, as published at the source. Science, 2016 · DOI ↗
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Field: Electrical and Electronic Engineering
Electrical and Electronic EngineeringEngineering