articleACS Energy LettersMar 9, 2022HYBRID OA

Perovskite/CIGS Tandem Solar Cells: From Certified 24.2% toward 30% and Beyond

MJMarko JoštEKEike KöhnenAAAmran Al‐AshouriTBTobias BertramŠTŠpela Tomšič

University of Ljubljana · Helmholtz-Zentrum Berlin für Materialien und Energie · +3 more institutions

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Abstract

We demonstrate a monolithic perovskite/CIGS tandem solar cell with a certified power conversion efficiency (PCE) of 24.2%. The tandem solar cell still exhibits photocurrent mismatch between the subcells; thus optical simulations are used to determine the optimal device stack. Results reveal a high optical potential with the optimized device reaching a short-circuit current density of 19.9 mA cm-2 and 32% PCE based on semiempirical material properties. To evaluate its energy yield, we first determine the CIGS temperature coefficient, which is at -0.38% K-1 notably higher than the one from the perovskite subcell (-0.22% K-1), favoring perovskite in the field operation at elevated cell temperatures. Both…

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Topics & keywords

Topics
Keywords
  • Tandem
  • Copper indium gallium selenide solar cells
  • Photocurrent
  • Perovskite (structure)
  • Energy conversion efficiency
  • Materials science
  • Stack (abstract data type)
  • Optoelectronics
UN Sustainable Development Goals
  • Affordable and clean energy
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