Localized holes and delocalized electrons in photoexcited inorganic perovskites: Watching each atomic actor by picosecond X-ray absorption spectroscopy

Clicks: 366
ID: 97261
2017
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Star

Ranked #1 of 2 articles by views in structural dynamics

Most read Least read

Bar heights use a square-root scale.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
We report on an element-selective study of the fate of charge carriers in photoexcited inorganic CsPbBr3 and CsPb(ClBr)3 perovskite nanocrystals in toluene solutions using time-resolved X-ray absorption spectroscopy with 80 ps time resolution. Probing the Br K-edge, the Pb L3-edge, and the Cs L2-edge, we find that holes in the valence band are localized at Br atoms, forming small polarons, while electrons appear as delocalized in the conduction band. No signature of either electronic or structural changes is observed at the Cs L2-edge. The results at the Br and Pb edges suggest the existence of a weakly localized exciton, while the absence of signatures at the Cs edge indicates that the Cs+ cation plays no role in the charge transport, at least beyond 80 ps. This first, time-resolved element-specific study of perovskites helps understand the rather modest charge carrier mobilities in these materials.
Reference Key
santomauro2017localizedstructural Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Santomauro, Fabio G.;Grilj, Jakob;Mewes, Lars;Nedelcu, Georgian;Yakunin, Sergii;Rossi, Thomas;Capano, Gloria;Haddad, André Al;Budarz, James;Kinschel, Dominik;Ferreira, Dario S.;Rossi, Giacomo;Tovar, Mario Gutierrez;Grolimund, Daniel;Samson, Valerie;Nachtegaal, Maarten;Smolentsev, Grigory;Kovalenko, Maksym V.;Chergui, Majed;
Journal structural dynamics
Year 2017
DOI
DOI not found
URL
http://dx.doi.org/10.1063/1.4971999
Keywords
Biology (General) economics as a science motor vehicles. aeronautics. astronautics transportation engineering crystallography

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.