Solution-processed chalcopyrite–perovskite tandem solar cells in bandgap-matched two- and four-terminal architectures

Abstract

Low-bandgap chalcopyrite absorbers exhibit excellent low-light performance and current matching to best performing semi-transparent perovskite cells enabling new record efficiencies for solution-processed tandem devices.

Solution‐Processed Low‐Bandgap CuIn(S,Se)2 Absorbers for High‐Efficiency Single‐Junction and Monolithic Chalcopyrite‐Perovskite Tandem Solar Cells

“…This raise is critical for reducing the conduction band offset towards CdS and enabling efficient charge collection and high fill factor (FF) values under UV-filtered light conditions. [12] 2f), where an increase of the minimum absorber bandgap from 0.98 eV to 1.03 eV is detected for devices from standard and graded precursors, respectively, while calculated Jsc values from EQE(λ) decreased from 38.9 mA/cm 2 to 36.4 mA/cm 2 . Both GD-OES ( Fig.…”

“…[10] While these results are impressive, the devices typically employ a mechanically-stacked architecture which eases manufacturing but may not be economically solution-processing. [4,5,11,12] Moreover, the bandgap of CIGS can be tuned to values as low as 1.0 eV which is predicted to afford excellent current matching in monolithic tandem devices with the current highest efficiency PSCs with a bandgap of 1.6 eV. [3,13] for the 11.4% efficient bottom cells were thereby obtained from hydrazine solutions, whose high toxicity and flammability may pose hindrances for commercialization.…”

Metal halide perovskite: a game-changer for photovoltaics and solar devices via a tandem design

“…With better understanding about materials, especially wide-bandgap materials, along with more advanced techniques for fabricating a semitransparent device, the 2-T perovskite/CIGS can reach higher efficiency. Uhl et al recently projected an efficiency of 18.5% for 2-T perovskite/CIGS by using a highly efficient semi-transparent p-i-n PSC with C 60 / bis-C 60 /ITO as the ETL and perovskite with optimized bandgap to match the CIGS solar cell [59]. We note that the efficiency was projected by measuring the perovskite and CIGS solar cell separately rather than from a complete monolithic cell.…”

“…efficiency evolution of tandem solar cells involving inorganic-organic metal-halide perovskites: 4-T perovskite/Si (record of 26.4%[22]), 2-T perovskite/Si (record of 23.6%[58]), 4-T perovskite/cigS (record of 22.1%[37]), 2-T perovskite/cigS (record of 18.5%[59]), 4-T perovskite/perovskite (record of 21.0%[38]), 2-T perovskite/perovskite (record of 18.5%[31]), and 2-T perovskite/ organic-polymer (oPv) (record of 16%[35]), and the record efficiency of the perovskite single-junction solar cell (22.1% [1]). notes: KRICT: Korea research institute of chemical Technology; UNIST: Ulsan national institute of Science and Technology; ANU: australian national University; Stanford: Stanford University; ASU: arizona State University; EMPA: Swiss federal laboratories for Materials Science and Technology; U. Toledo: University of Toledo; U. Valencia: University of valencia; U.…”

Perovskite‐Based Tandem Solar Cells: Get the Most Out of the Sun

“…Later, Uhl et al developed a novel solutionprocessed inverted perovskite cell with C 60 /bis-C 60 /ITO as the electron transporting layers. [172] In combination with solution-processed CIGS solar cells, the efficiency of the final 4T perovskite/ CIGS TSCs was further enhanced to 12.7%. These results indicate that the solution-based tandem device is one promising candidate for low-cost thin-film solar cells.…”