Journal
ACS APPLIED ENERGY MATERIALS
Volume 2, Issue 11, Pages 7823-7831Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.9b01224
Keywords
perovskite; CIGS; tandem; TCO; indium oxide; current loss analysis
Funding
- Federal Ministry of Education and Research (BMBF) [03SF0516A]
- Helmholtz Association through the HYIG [FKZ VH-NG-1148]
- project PEROSEED [FKZ ZT-0024]
- Helmholtz Energy Materials Foundry (HEMF)
- Karlsruhe School of Optics & Photonics (KSOP)
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Hybrid lead halide perovskite solar cells (PSCs) in tandem application with copper indium gallium diselenide (CIGS) solar cells represent one of the most promising all-thin-film technologies for next-generation photovoltaic devices. To minimize parasitic near-infrared (NIR) absorption losses in the electrodes, this work advances hydrogen-doped indium oxide (IO:H) and indium zinc oxide (IZO) electrodes for semitransparent perovskite solar cells. The total NIR absorptance (800-1300 nm) of the perovskite top cell is reduced to <7%, maximizing the bottom cell output current. Already taking first steps toward up-scaling, the perovskite active area is increased to match the GIGS active area of 0.5 cm(2), and the R-s is optimized by the implementation of a metal grid. The semitransparent perovskite solar cell reaches a power conversion efficiency of 15%. Combined with a CIGS bottom solar cell, a 4-terminal-tandem solar cell with 23% power conversion efficiency is demonstrated. We conduct detailed current loss analyses of the complete tandem devices to monitor and evaluate the improvements of this work.
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