TY - JOUR
T1 - Triple-cation low-bandgap perovskite thin-films for high-efficiency four-terminal all-perovskite tandem solar cells
AU - Moghadamzadeh, Somayeh
AU - Hossain, Ihteaz M.
AU - Duong, The
AU - Gharibzadeh, Saba
AU - Abzieher, Tobias
AU - Pham, Huyen
AU - Hu, Hang
AU - Fassl, Paul
AU - Lemmer, Uli
AU - Nejand, Bahram Abdollahi
AU - Paetzold, Ulrich W.
N1 - Funding Information:
We acknowledge support by the KIT-Publication Fund of the Karlsruhe Institute of Technology. We would like to thank Dirk Hauschild (KIT) and Lothar Weinhardt (KIT) for XPS measurements. S. M. would like to acknowledge the nancial support from DAAD (Deutscher Akademischer Austauschdienst/German academic exchange service) for her doctoral research work under personal reference number 91621525. The nancial support by Alexander von Humboldt (Georg Forster Research Fellowship), German Federal Ministry of Education and Research (BMBF) through PRINTPERO (03SF0557A) project, German Federal Ministry for Economic Affairs and Energy (CAPITANO, funding code: 03EE1038B), the Initiating and Networking funding of Helmholtz Association HYIG of U.W.P. (VH-NG-1148), Helmholtz Energy Materials Foundry (HEMF), PEROSEED (ZT-0024), Science and Technology of Nano-structures (STN), and Karlsruhe School of Optics & Photonics (KSOP) is gratefully acknowledged. T. D. acknowledges the nancial support of a Postdoc Fellowship from the Australian Centre for Advanced Photovoltaics (ACAP). Part of the experiment was performed at the Australian National Fabrication Facility (ANFF) ACT Node.
Publisher Copyright:
© The Royal Society of Chemistry.
PY - 2020/12/14
Y1 - 2020/12/14
N2 - All-perovskite multi-junction photovoltaics, comprised of a wide-bandgap (WBG) and a low-bandgap (LBG) perovskite solar cell (PSC), has opened a new window to cost-effective yet highly efficient solar cells (>33%). However, the poor operational stability of LBG PSCs is a major obstacle to the technological advance of all-perovskite tandem solar cells (all-PTSC). This study demonstrates that introducing minute quantities of Cs (1-10%) into the LBG FA0.8MA0.2Sn0.5Pb0.5I3 perovskite semiconductors (Eg = 1.26 eV) significantly improves the operational photo-stability of the corresponding LBG PSCs, due to a reduction of residual nanosized SnyPb(1-y)I2 aggregates, resulting in a beneficial stoichiometric composition. For an optimal concentration of Cs (2.5%) in the investigated range, the LBG PSCs attain remarkable power conversion efficiency (PCE) as high as 18.2% and maintain up to 92% of their initial power output after two hours under simulated one sun illumination. By mechanically stacking high-performance LBG bottom PSCs with semi-transparent top PSCs (Eg = 1.65 eV), four-terminal all-PTSCs with high PCE of 23.6% are attainable.
AB - All-perovskite multi-junction photovoltaics, comprised of a wide-bandgap (WBG) and a low-bandgap (LBG) perovskite solar cell (PSC), has opened a new window to cost-effective yet highly efficient solar cells (>33%). However, the poor operational stability of LBG PSCs is a major obstacle to the technological advance of all-perovskite tandem solar cells (all-PTSC). This study demonstrates that introducing minute quantities of Cs (1-10%) into the LBG FA0.8MA0.2Sn0.5Pb0.5I3 perovskite semiconductors (Eg = 1.26 eV) significantly improves the operational photo-stability of the corresponding LBG PSCs, due to a reduction of residual nanosized SnyPb(1-y)I2 aggregates, resulting in a beneficial stoichiometric composition. For an optimal concentration of Cs (2.5%) in the investigated range, the LBG PSCs attain remarkable power conversion efficiency (PCE) as high as 18.2% and maintain up to 92% of their initial power output after two hours under simulated one sun illumination. By mechanically stacking high-performance LBG bottom PSCs with semi-transparent top PSCs (Eg = 1.65 eV), four-terminal all-PTSCs with high PCE of 23.6% are attainable.
UR - https://www.scopus.com/pages/publications/85097720044
U2 - 10.1039/d0ta07005j
DO - 10.1039/d0ta07005j
M3 - Article
AN - SCOPUS:85097720044
SN - 2050-7488
VL - 8
SP - 24608
EP - 24619
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 46
ER -
SDG 7 Affordable and Clean Energy