High Charge Carrier Mobilities and Lifetimes in Organolead Trihalide Perovskites

High Charge Carrier Mobilities and Lifetimes in Organolead Trihalide Perovskites

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. Thi...

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Veröffentlicht in:Advanced materials (Weinheim) 2014-03, Vol.26 (10), p.1584-1589
Hauptverfasser: Wehrenfennig, Christian, Eperon, Giles E., Johnston, Michael B., Snaith, Henry J., Herz, Laura M.
Format: Artikel
Sprache:eng
Schlagworte:
CH3NH3PbI3
Charge
Communications
Constants
Crystals
Current carriers
Diffusion length
Heterojunctions
Materials science
Micrometers
Perovskites
Photovoltaic cells
photovoltaics
recombination
Solar cells
terahertz
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Beschreibung
Zusammenfassung: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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201305172