Oxygen-Mediated (0D) Cs 4 PbX 6 Formation during Open-Air Thermal Processing Improves Inorganic Perovskite Solar Cell Performance.

Autor: Saha RA; cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium., Chiu WH; School of Chemistry and Physics, Faculty of Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia.; Centre for Materials Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia., Degutis G; cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium., Chen P; School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.; Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia., Filez M; cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium.; Conformal Coating of Nanomaterials (CoCooN), Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, 9000 Ghent, Belgium., Solano E; NCD-SWEET Beamline, ALBA Synchrotron Light Source, 08290 Cerdanyola del Vallès, Barcelona, Spain., Orlov N; Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands., De Angelis F; Department of Science, Roma Tre University, via Della Vasca Navale 84, 00146 Rome, Italy., Ariza R; cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium., Meneghini C; Department of Science, Roma Tre University, via Della Vasca Navale 84, 00146 Rome, Italy., Detavernier C; Conformal Coating of Nanomaterials (CoCooN), Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, 9000 Ghent, Belgium., Mali SS; Polymer Energy Materials Laboratory, School of Chemical Engineering, Chonnam National University, Gwangju 61186, South Korea., Hoang MT; School of Chemistry and Physics, Faculty of Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia.; Centre for Materials Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia., Yang Y; School of Chemistry and Physics, Faculty of Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia.; Centre for Materials Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia., Garnett EC; Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.; Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands., Wang L; School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.; Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia., Wang H; School of Chemistry and Physics, Faculty of Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia.; Centre for Materials Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia., Roeffaers MBJ; cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium., Steele JA; Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia.; School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia.
Jazyk: angličtina
Zdroj: ACS nano [ACS Nano] 2024 Jul 02; Vol. 18 (26), pp. 16994-17006. Date of Electronic Publication: 2024 Jun 20.
DOI: 10.1021/acsnano.4c03222
Abstrakt: The desire to commercialize perovskite solar cells continues to mount, motivating the development of scalable production. Evaluations of the impact of open-air processing have revealed a variety of physical changes in the fabricated devices─with few changes having the capacity to be functionalized. Here, we highlight the beneficial role of ambient oxygen during the open-air thermal processing of metastable γ-CsPbI 3 -based perovskite thin films and devices. Physiochemical-sensitive probes elucidate oxygen intercalation and the formation of Pb-O bonds in the CsPbI 3 crystal, entering via iodine vacancies at the surface, creating superoxide (O 2 - ) through electron transfer reactions with molecular oxygen, which drives the formation of a zero-dimensional Cs 4 PbI 6 capping layer during annealing (>330 °C). The chemical conversion permanently alters the film structure, helping to shield the subsurface perovskite from moisture and introduces lattice anchoring sites, stabilizing otherwise unstable γ-CsPbI 3 films. This functional modification is demonstrated in γ-CsPbI 2 Br perovskite solar cells, boosting the operational stability and photoconversion efficiency of champion devices from 12.7 to 15.4% when annealed in dry air. Such findings prompt a reconsideration of glovebox-based perovskite solar cell research and establish a scenario where device fabrication can in fact greatly benefit from ambient oxygen.
Databáze: MEDLINE