Abstract
We investigate the efficiency potential of organic-inorganic halide perovskite/crystalline silicon tandem solar cells, a new class of photovoltaic devices targeting long-term cost reductions by ultrahigh conversion efficiencies. Methyl ammonium lead triiodide perovskite solar cells are particularly interesting as the top cell in Si-based tandem devices due to their suitable band gap, high photovoltage, and low sub-bandgap absorption. We derive optical models for a perovskite/Si tandem cell with Lambertian light trapping in the perovskite top cell, as well as for a top cell in the single pass limit. We find that unlike for other thin-film device architectures, light trapping is not required for the triiodide perovskite/Si tandem to reach matched top and bottom cell currents. While a Lambertian top cell could be employed in a four-terminal tandem, a top cell in the single pass limit enables a current-matched monolithic device with realistic top cell thicknesses. We calculate a limiting efficiency of 35.67% for an ideal (no parasitic absorption, ideal contacts) monolithic tandem, assuming a top cell open-circuit voltage of 1100 mV.
Original language | English (US) |
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Article number | 6910221 |
Pages (from-to) | 1545-1551 |
Number of pages | 7 |
Journal | IEEE Journal of Photovoltaics |
Volume | 4 |
Issue number | 6 |
DOIs | |
State | Published - Nov 2014 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2014 IEEE.
Keywords
- Advanced concept organic PV
- QD enhanced
- and thin-film PV device properties
- modeling
- organic-inorganic hybrid materials
- perovskite
- photovoltaic cells
- tandem
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering