Antimony-Bismuth Alloying: The Key to a Major Boost in the Efficiency of Lead-Free Perovskite-Inspired Photovoltaics.

Autor: Al-Anesi B; Hybrid Solar Cells, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, FI-33014, Finland., Grandhi GK; Hybrid Solar Cells, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, FI-33014, Finland., Pecoraro A; Department of Physics 'Ettore Pancini' University of Naples Federico II, Comp. Univ. Monte Sant'Angelo, Naples, 80126, Italy., Sugathan V; Hybrid Solar Cells, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, FI-33014, Finland., Viswanath NSM; Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea., Ali-Löytty H; Surface Science Group, Photonics Laboratory, Tampere University, P.O. Box 692, Tampere, FI-33014, Finland., Liu M; Hybrid Solar Cells, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, FI-33014, Finland., Ruoko TP; Smart Photonic Materials, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, FI-33101, Finland., Lahtonen K; Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 692, Tampere, FI-33014, Finland., Manna D; Hybrid Solar Cells, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, FI-33014, Finland., Toikkonen S; Hybrid Solar Cells, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, FI-33014, Finland., Muñoz-García AB; Department of Physics 'Ettore Pancini' University of Naples Federico II, Comp. Univ. Monte Sant'Angelo, Naples, 80126, Italy., Pavone M; Department of Chemical Sciences, University of Naples Federico II, Comp. Univ. Monte Sant'Angelo, Naples, 80126, Italy., Vivo P; Hybrid Solar Cells, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, FI-33014, Finland.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2023 Nov; Vol. 19 (46), pp. e2303575. Date of Electronic Publication: 2023 Jul 14.
DOI: 10.1002/smll.202303575
Abstrakt: The perovskite-inspired Cu 2 AgBiI 6 (CABI) material has been gaining increasing momentum as photovoltaic (PV) absorber due to its low toxicity, intrinsic air stability, direct bandgap, and a high absorption coefficient in the range of 10 5  cm -1 . However, the power conversion efficiency (PCE) of existing CABI-based PVs is still seriously constrained by the presence of both intrinsic and surface defects. Herein, antimony (III) (Sb 3+ ) is introduced into the octahedral lattice sites of the CABI structure, leading to CABI-Sb with larger crystalline domains than CABI. The alloying of Sb 3+ with bismuth (III) (Bi 3+ ) induces changes in the local structural symmetry that dramatically increase the formation energy of intrinsic defects. Light-intensity dependence and electron impedance spectroscopic studies show reduced trap-assisted recombination in the CABI-Sb PV devices. CABI-Sb solar cells feature a nearly 40% PCE enhancement (from 1.31% to 1.82%) with respect to the CABI devices mainly due to improvement in short-circuit current density. This work will promote future compositional design studies to enhance the intrinsic defect tolerance of next-generation wide-bandgap absorbers for high-performance and stable PVs.
(© 2023 The Authors. Small published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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