articleAdvanced MaterialsDec 20, 2013BRONZE OA

High Charge Carrier Mobilities and Lifetimes in Organolead Trihalide Perovskites

CWChristian WehrenfennigGEGiles E. EperonMBMichael B. JohnstonHJHenry J. SnaithLMLaura M. Herz

University of Oxford

PubMed
Indexed incrossrefpubmed

Abstract

Organolead trihalide perovskites are shown to exhibit the best of both worlds: charge-carrier mobilities around 10 cm2 V−1 s−1 and low bi-molecular charge-recombination constants. The ratio of the two is found to defy the Langevin limit of kinetic charge capture by over four orders of magnitude. This mechanism causes long (micrometer) charge-pair diffusion lengths crucial for flat-heterojunction photovoltaics.

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Topics & keywords

Topics
Keywords
  • Trihalide
  • Materials science
  • Charge carrier
  • Chemical physics
  • Diffusion
  • Charge (physics)
  • Heterojunction
  • Photovoltaics
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