Diffusion length of photo-generated charge carriers in layers and powders of CH3NH3PbI3 perovskite

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

The diffusion or transport lengths of photo-generated charge carriers in CH3NH3PbI3 layers (thickness up to 1 μm) and powders have been directly measured with high accuracy by modulated surface photovoltage after Goodman. The values of the diffusion lengths of photo-generated charge carriers ranged from 200 nm to tenths of μm. In thin CH3NH3PbI3 layers, the transport lengths corresponded to the layer thickness whereas in thicker layers and in crystallites of CH3NH3PbI3 powders the grain size limited the diffusion length. For grains, the diffusion length of photo-generated charge carriers depended on the measurement conditions.

Detaljer

Författare
  • Th Dittrich
  • F. Lang
  • O. Shargaieva
  • J. Rappich
  • N. H. Nickel
  • E. Unger
  • B. Rech
Enheter & grupper
Externa organisationer
  • Helmholtz-Zentrum Berlin for Materials and Energy
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Fysikalisk kemi
Originalspråkengelska
Artikelnummer073901
TidskriftApplied Physics Letters
Volym109
Utgåva nummer7
StatusPublished - 2016 jan 1
PublikationskategoriForskning
Peer review utfördJa