Abstract

A metal-organic hybrid perovskite (CH3NH3PbI3) with three-dimensional framework of metal-halide octahedra has been reported as a low-cost, solution-processable absorber for a thin-film solar cell with a power-conversion efficiency over 20%. Low-dimensional layered perovskites with metal halide slabs separated by the insulating organic layers are reported to show higher stability, but the efficiencies of the solar cells are limited by the confinement of excitons. In order to explore the confinement and transport of excitons in zero-dimensional metal–organic hybrid materials, a highly orientated film of (CH3NH3)3Bi2I9 with nanometre-sized core clusters of Bi2I93− surrounded by insulating CH3NH3+ was prepared via solution processing. The (CH3NH3)3Bi2I9 film shows highly anisotropic photoluminescence emission and excitation due to the large proportion of localised excitons coupled with delocalised excitons from intercluster energy transfer. The abrupt increase in photoluminescence quantum yield at excitation energy above twice band gap could indicate a quantum cutting due to the low dimensionality.

Details

Title
Charge carrier localised in zero-dimensional (CH3NH3)3Bi2I9 clusters
Author
Ni, Chengsheng 1 ; Hedley, Gordon 2   VIAFID ORCID Logo  ; Payne, Julia 3 ; Svrcek, Vladimir 4 ; McDonald, Calum 5   VIAFID ORCID Logo  ; Lethy Krishnan Jagadamma 2 ; Edwards, Paul 6   VIAFID ORCID Logo  ; Martin, Robert 6   VIAFID ORCID Logo  ; Jain, Gunisha 5 ; Carolan, Darragh 5   VIAFID ORCID Logo  ; Mariotti, Davide 5 ; Maguire, Paul 5   VIAFID ORCID Logo  ; Ifor Samuel 2   VIAFID ORCID Logo  ; Irvine, John 7 

1  School of Chemistry, University of St Andrews, Scotland, UK; College of Resources and Environment, Southwest University, Beibei, Chongqing, China 
2  School of Physics and Astronomy, University of St Andrews, Scotland, UK 
3  School of Chemistry, University of St Andrews, Scotland, UK 
4  Research Center for Photovoltaics, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan 
5  Nanotechnology and Integrated Bioengineering Centre, Ulster University, Northern Ireland, UK 
6  Department of Physics, SUPA, University of Strathclyde, Glasgow, Scotland, UK 
7  School of Chemistry, University of St Andrews, Scotland, UK; Key Lab of Design and Assembly of Functional Nanostructure, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China 
Pages
1-7
Publication year
2017
Publication date
Aug 2017
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41467-017-00261-9
ProQuest document ID
1924846036
Copyright
© 2017. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.