Perovskite/CIGS tandem solar cells : from certified 24.2% toward 30% and beyond

Jošt, Marko (author), Köhnen, Eike (author), Al-Ashouri, Amran (author), Bertram, Tobias (author), Tomšič, Špela (author), Magomedov, Artiom (author), Kasparavičius, Ernestas (author), Kodalle, Tim (author), Lipovšek, Benjamin (author), Getautis, Vytautas (author), Schlatmann, Rutger (author), Kaufmann, Christian A. (author), Albrecht, Steve (author), Topič, Marko (author)

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 single-junction cells, however, are significantly outperformed by the combined tandem device. The enhancement in energy output is more than 50% in the case of CIGS single-junction device. The results demonstrate the high potential of perovskite/CIGS tandem solar cells, for which we describe optical guidelines toward 30% PCE.

• Language: English
• Keywords: photovoltaics, perovskite tandem solar cells, optical optimization, energy yield, electrical conductivity, layers, perovskites, power conversion efficiency, solar cells
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: Str. 1298-1307
• Numbering: Vol. 7, iss. 4
• PID: 20.500.12556/RUL-140519
• UDC: 621.383.51
• ISSN on article: 2380-8195
• DOI: 10.1021/acsenergylett.2c00274
• COBISS.SI-ID: 100592131
• Publication date in RUL: 15.09.2022

Record is a part of a journal

• Title: ACS energy letters
• Shortened title: ACS energy lett.
• Publisher: American Chemical Society
• ISSN: 2380-8195
• COBISS.SI-ID: 526893849

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: fotovoltaika, perovskitne tandemske sončne celice, optična optimizacija, energijski izplen