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Synthetic control over orientational degeneracy of spacer cations enhances solar cell efficiency in two-dimensional perovskites.
Hu, Jun; Oswald, Iain W H; Stuard, Samuel J; Nahid, Masrur Morshed; Zhou, Ninghao; Williams, Olivia F; Guo, Zhenkun; Yan, Liang; Hu, Huamin; Chen, Zheng; Xiao, Xun; Lin, Yun; Yang, Zhibin; Huang, Jinsong; Moran, Andrew M; Ade, Harald; Neilson, James R; You, Wei.
Afiliación
  • Hu J; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Oswald IWH; Department of Chemistry, Colorado State University, Fort Collins, Colorado, 80523, USA.
  • Stuard SJ; Department of Physics, North Carolina State University, Raleigh, NC, 27695, USA.
  • Nahid MM; Department of Physics, North Carolina State University, Raleigh, NC, 27695, USA.
  • Zhou N; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Williams OF; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Guo Z; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Yan L; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Hu H; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Chen Z; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Xiao X; Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Lin Y; Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Yang Z; Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Huang J; Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Moran AM; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Ade H; Department of Physics, North Carolina State University, Raleigh, NC, 27695, USA.
  • Neilson JR; Department of Chemistry, Colorado State University, Fort Collins, Colorado, 80523, USA.
  • You W; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA. wyou@unc.edu.
Nat Commun ; 10(1): 1276, 2019 03 20.
Article en En | MEDLINE | ID: mdl-30894519
Two-dimensional perovskites have emerged as more intrinsically stable materials for solar cells. Chemical tuning of spacer organic cations has attracted great interest due to their additional functionalities. However, how the chemical nature of the organic cations affects the properties of two-dimensional perovskites and devices is rarely reported. Here we demonstrate that the selection of spacer cations (i.e., selective fluorination of phenethylammonium) affects the film properties of two-dimensional perovskites, leading to different device performance of two-dimensional perovskite solar cells (average n = 4). Structural analysis reveals that different packing arrangements and orientational disorder of the spacer cations result in orientational degeneracy and different formation energies, largely explaining the difference in film properties. This work provides key missing information on how spacer cations exert influence on desirable electronic properties and device performance of two-dimensional perovskites via the weak and cooperative interactions of these cations in the crystal lattice.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido