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Efficient and Stable PbS Quantum Dot Solar Cells by Triple-Cation Perovskite Passivation.
Albaladejo-Siguan, Miguel; Becker-Koch, David; Taylor, Alexander D; Sun, Qing; Lami, Vincent; Oppenheimer, Pola Goldberg; Paulus, Fabian; Vaynzof, Yana.
Afiliação
  • Albaladejo-Siguan M; Kirchhoff Institute for Physics, Heidelberg University , Im Neuenheimer Feld 227 , 69120 Heidelberg , Germany.
  • Becker-Koch D; Integrated Centre for Applied Physics and Photonic Materials and Centre for Advancing Electronics Dresden (cfaed) , Technical University of Dresden , Nöthnitzer Straße 61 , 01187 Dresden , Germany.
  • Taylor AD; Kirchhoff Institute for Physics, Heidelberg University , Im Neuenheimer Feld 227 , 69120 Heidelberg , Germany.
  • Sun Q; Integrated Centre for Applied Physics and Photonic Materials and Centre for Advancing Electronics Dresden (cfaed) , Technical University of Dresden , Nöthnitzer Straße 61 , 01187 Dresden , Germany.
  • Lami V; Kirchhoff Institute for Physics, Heidelberg University , Im Neuenheimer Feld 227 , 69120 Heidelberg , Germany.
  • Oppenheimer PG; Integrated Centre for Applied Physics and Photonic Materials and Centre for Advancing Electronics Dresden (cfaed) , Technical University of Dresden , Nöthnitzer Straße 61 , 01187 Dresden , Germany.
  • Paulus F; Kirchhoff Institute for Physics, Heidelberg University , Im Neuenheimer Feld 227 , 69120 Heidelberg , Germany.
  • Vaynzof Y; Kirchhoff Institute for Physics, Heidelberg University , Im Neuenheimer Feld 227 , 69120 Heidelberg , Germany.
ACS Nano ; 14(1): 384-393, 2020 Jan 28.
Article em En | MEDLINE | ID: mdl-31721556
Solution-processed quantum dots (QDs) have a high potential for fabricating low-cost, flexible, and large-scale solar energy harvesting devices. It has recently been demonstrated that hybrid devices employing a single monovalent cation perovskite solution for PbS QD surface passivation exhibit enhanced photovoltaic performance when compared to standard ligand passivation. Herein, we demonstrate that the use of a triple cation Cs0.05(MA0.17FA0.83)0.95Pb(I0.9Br0.1)3 perovskite composition for surface passivation of the quantum dots results in highly efficient solar cells, which maintain 96% of their initial performance after 1200 h shelf storage. We confirm perovskite shell formation around the PbS nanocrystals by a range of spectroscopic techniques as well as high-resolution transmission electron microscopy. We find that the triple cation shell results in a favorable energetic alignment to the core of the dot, resulting in reduced recombination due to charge confinement without limiting transport in the active layer. Consequently, photovoltaic devices fabricated via a single-step film deposition reached a maximum AM1.5G power conversion efficiency of 11.3% surpassing most previous reports of PbS solar cells employing perovskite passivation.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article