TY - JOUR

T1 - 2D/3D Heterostructure for Semitransparent Perovskite Solar Cells with Engineered Bandgap Enables Efficiencies Exceeding 25% in Four-Terminal Tandems with Silicon and CIGS

AU - Gharibzadeh, Saba

AU - Hossain, Ihteaz M.

AU - Fassl, Paul

AU - Nejand, Bahram Abdollahi

AU - Abzieher, Tobias

AU - Schultes, Moritz

AU - Ahlswede, Erik

AU - Jackson, Philip

AU - Powalla, Michael

AU - Schäfer, Sören

AU - Rienäcker, Michael

AU - Wietler, Tobias

AU - Peibst, Robby

AU - Lemmer, Uli

AU - Richards, Bryce S.

AU - Paetzold, Ulrich W.

N1 - Funding Information: S.G. and I.M.H. contributed equally to this work. The authors acknowledge the financial supports by the Initiating and Networking funding of the Helmholtz Association (HYIG of Dr. U.W. Paetzold [VH-NG-1148]; Recruitment Initiative of Prof. B.S. Richards; the Helmholtz Energy Materials Foundry (HEMF); PEROSEED [ZT-0024]; Innovationpool); the Helmholtz Association ? through the program ?Science and Technology of Nanosystems (STN)?; the KIT Young Investigator Network; the German Federal Ministry for Economic Affairs (BMWi) (grant: CAPITANO [03EE1038B]); and the German Federal Ministry of Education and Research (BMBF) (grant: PRINTPERO [03SF0557A]). The authors gratefully acknowledge the help and support of the Karlsruhe School of Optics & Photonics (KSOP) and Max Planck School of Photonics (MPSP), respectively. The work at ISFH was supported by the German Federal Ministry for Economic Affairs and Energy (BMWi) under contract no. 0325827A and the State of Lower Saxony.

PY - 2020/5/11

Y1 - 2020/5/11

N2 - Wide-bandgap perovskite solar cells (PSCs) with optimal bandgap (Eg) and high power conversion efficiency (PCE) are key to high-performance perovskite-based tandem photovoltaics. A 2D/3D perovskite heterostructure passivation is employed for double-cation wide-bandgap PSCs with engineered bandgap (1.65 eV ≤ Eg ≤ 1.85 eV), which results in improved stabilized PCEs and a strong enhancement in open-circuit voltages of around 45 mV compared to reference devices for all investigated bandgaps. Making use of this strategy, semitransparent PSCs with engineered bandgap are developed, which show stabilized PCEs of up to 25.7% and 25.0% in four-terminal perovskite/c-Si and perovskite/CIGS tandem solar cells, respectively. Moreover, comparable tandem PCEs are observed for a broad range of perovskite bandgaps. For the first time, the robustness of the four-terminal tandem configuration with respect to variations in the perovskite bandgap for two state-of-the-art bottom solar cells is experimentally validated.

AB - Wide-bandgap perovskite solar cells (PSCs) with optimal bandgap (Eg) and high power conversion efficiency (PCE) are key to high-performance perovskite-based tandem photovoltaics. A 2D/3D perovskite heterostructure passivation is employed for double-cation wide-bandgap PSCs with engineered bandgap (1.65 eV ≤ Eg ≤ 1.85 eV), which results in improved stabilized PCEs and a strong enhancement in open-circuit voltages of around 45 mV compared to reference devices for all investigated bandgaps. Making use of this strategy, semitransparent PSCs with engineered bandgap are developed, which show stabilized PCEs of up to 25.7% and 25.0% in four-terminal perovskite/c-Si and perovskite/CIGS tandem solar cells, respectively. Moreover, comparable tandem PCEs are observed for a broad range of perovskite bandgaps. For the first time, the robustness of the four-terminal tandem configuration with respect to variations in the perovskite bandgap for two state-of-the-art bottom solar cells is experimentally validated.

KW - 2D perovskites

KW - 3D perovskites

KW - copper indium gallium diselenide

KW - tandem solar cells

UR - http://www.scopus.com/inward/record.url?scp=85081348924&partnerID=8YFLogxK

U2 - 10.1002/adfm.201909919

DO - 10.1002/adfm.201909919

M3 - Article

AN - SCOPUS:85081348924

VL - 30

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 19

M1 - 1909919

ER -