Impact of Small Phonon Energies on the Charge-Carrier Lifetimes in Metal-Halide Perovskites

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F18%3A00324577" target="_blank" >RIV/68407700:21230/18:00324577 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/acs.jpclett.7b03414" target="_blank" >http://dx.doi.org/10.1021/acs.jpclett.7b03414</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpclett.7b03414" target="_blank" >10.1021/acs.jpclett.7b03414</a>

Result language
angličtina
Original language name
Impact of Small Phonon Energies on the Charge-Carrier Lifetimes in Metal-Halide Perovskites
Original language description
Metal-halide perovskite (MHP) solar cells exhibit long non-radiative lifetimes as a crucial feature enabling high efficiencies. Long non-radiative lifetimes occur if the transfer of electronic into vibrational energy is slow due to, e.g., a low trap density, weak electronphonon coupling or the requirement to release a many phonons in the electronic transition. Here, we combine known material properties of MHPs with basic models for electron-phonon coupling and multiphonon-transition rates in polar semiconductors. We find that the low phonon energies of MAPbI3 lead to a strong dependence of recombination rates on trap position, which we deduce from the underlying physical effects determining non-radiative transitions. This is important for non-radiative recombination in MHPs, as it implies that they are rather insensitive to defects that are not at midgap energy, which can lead to long lifetimes. Therefore, the low phonon energies of MHPs are likely an important factor for their optoelectronic performance.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20704 - Energy and fuels

Project
<a href="/en/project/EF15_003%2F0000464" target="_blank" >EF15_003/0000464: Centre of Advanced Photovoltaics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)