Extremely efficient internal exciton dissociation through edge states in layered 2D perovskites-Reference-Cited by-同舟云学术

Extremely efficient internal exciton dissociation through edge states in layered 2D perovskites

Published:2017-03-24 Issue:6331 Volume:355 Page:1288-1292
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Blancon J.-C.¹^ORCID,Tsai H.¹²,Nie W.¹,Stoumpos C. C.³^ORCID,Pedesseau L.⁴^ORCID,Katan C.⁵^ORCID,Kepenekian M.⁵^ORCID,Soe C. M. M.³^ORCID,Appavoo K.⁶,Sfeir M. Y.⁶^ORCID,Tretiak S.¹^ORCID,Ajayan P. M.²,Kanatzidis M. G.³⁷,Even J.⁴^ORCID,Crochet J. J.¹^ORCID,Mohite A. D.¹^ORCID

Affiliation:

1. Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

2. Department of Materials Science and Nanoengineering, Rice University, Houston, TX 77005, USA.

3. Department of Chemistry, Northwestern University, Evanston, IL 60208, USA.

4. Fonctions Optiques pour les Technologies de l’Information (FOTON), Institut National des Sciences Appliquées (INSA) de Rennes, CNRS, UMR 6082, 35708 Rennes, France.

5. Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes 1, CNRS, UMR 6226, 35042 Rennes, France.

6. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973, USA.

7. Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA.

Abstract

How perovskites have the edge Two-dimensional Ruddlesden-Popper perovskites form quantum wells by sandwiching inorganic-organic perovskite layers used in photovoltaic devices between organic layers. Blancon et al. show that if the perovskite layer is more than two unit cells thick, photogenerated excitons undergo an unusual but highly efficient process for creating free carriers that can be harvested in photovoltaic devices (see the Perspective by Bakr and Mohammed). Lower-energy local states at the edges of the perovskite layer facilitate dissociation into electrons and holes that are well protected from recombination. Science , this issue p. 1288 ; see also p. 1260

Funder

U.S. Department of Energy

Los Alamos National Laboratory

University of Rennes 1

Centre National de la Recherche Scientifique

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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