Open AccessLocal Versus Long‐Range Diffusion Effects of Photoexcited States on Radiative Recombination in Organic–Inorganic Lead Halide Perovskites
Author(s) -
Vrućinić Milan,
Matthiesen Clemens,
Sadhanala Aditya,
Divitini Giorgio,
Cacovich Stefania,
Dutton Sian E.,
Ducati Caterina,
Atatüre Mete,
Snaith Henry,
Friend Richard H.,
Sirringhaus Henning,
Deschler Felix
Publication year - 2015
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201500136
Subject(s) - engineering physics , art history , art , physics
Radiative recombination in thin films of the archetypical, high‐performing perovskites CH 3 NH 3 PbBr 3 and CH 3 NH 3 PbI 3 shows localized regions of increased emission with dimensions ≈500 nm. Maps of the spectral emission line shape show narrower emission lines in high emission regions, which can be attributed to increased order. Excited states do not diffuse out of high emission regions before they decay, but are decoupled from nearby regions, either by slow diffusion rates or energetic barriers.