Journal
ACS ENERGY LETTERS
Volume 7, Issue 4, Pages 1298-1307Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.2c00274
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Funding
- Slovene Research Agency (ARRS) [P2-0415, J2-1727]
- German Federal Ministry of Education and Research (BMBF) [03SF0540]
- Helmholtz Association
- EU
- DAAD [BI-DE/2017-2019/004]
- Research Council of Lithuania [01.2.2-LMT-K-718-03-0040]
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A monolithic perovskite/CIGS tandem solar cell with a certified power conversion efficiency (PCE) of 24.2% is demonstrated. The optimal device stack is determined using optical simulations, and the energy yield is evaluated. The results show the high potential of perovskite/CIGS tandem solar cells in significantly enhancing energy output.
We demonstrate a monolithic perovskite/CIGS tandem solar cell with acertified power conversion efficiency (PCE) of 24.2%. The tandem solar cell still exhibitsphotocurrent mismatch between the subcells; thus optical simulations are used todetermine the optimal device stack. Results reveal a high optical potential with theoptimized device reaching a short-circuit current density of 19.9 mA cm-2and 32% PCEbased on semiempirical material properties. To evaluate its energy yield, wefirstdetermine the CIGS temperature coefficient, which is at-0.38% K-1notably higherthan the one from the perovskite subcell (-0.22% K-1), favoring perovskite in thefieldoperation at elevated cell temperatures. Both single-junction cells, however, aresignificantly outperformed by the combined tandem device. The enhancement in energyoutput is more than 50% in the case of CIGS single-junction device. The resultsdemonstrate the high potential of perovskite/CIGS tandem solar cells, for which wedescribe optical guidelines toward 30% PCE
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