Cargando…

Energy barrier at the N719-dye/CsSnI(3) interface for photogenerated holes in dye-sensitized solar cells

This report is to address the question if black γ-polymorph of cesium tin tri-iodide (B-γ-CsSnI(3)) can be used as a solid-state hole-transport material in the conventional DSSCs with the N719 dye to replace the liquid electrolyte as reported by I. Chung et al. on Nature 485, 486, (2012). Here we de...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhang, Jin, Yu, Chunhui, Wang, Lili, Li, Yizhi, Ren, Yuhang, Shum, Kai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4223680/
https://www.ncbi.nlm.nih.gov/pubmed/25378076
http://dx.doi.org/10.1038/srep06954
_version_ 1782343240216739840
author Zhang, Jin
Yu, Chunhui
Wang, Lili
Li, Yizhi
Ren, Yuhang
Shum, Kai
author_facet Zhang, Jin
Yu, Chunhui
Wang, Lili
Li, Yizhi
Ren, Yuhang
Shum, Kai
author_sort Zhang, Jin
collection PubMed
description This report is to address the question if black γ-polymorph of cesium tin tri-iodide (B-γ-CsSnI(3)) can be used as a solid-state hole-transport material in the conventional DSSCs with the N719 dye to replace the liquid electrolyte as reported by I. Chung et al. on Nature 485, 486, (2012). Here we demonstrate rigorously that B-γ-CsSnI(3) is not energetically possible to collect photogenerated holes because of the large energy barrier at the interface of N719/B-γ-CsSnI(3). Therefore, it cannot serve as a hole-transporter for the conventional DSSCs although it is a good hole-conducting material. A solution-based method was employed to synthesize the B-γ-CsSnI(3) polycrystalline thin-films used for this work. These thin-films were then characterized by X-ray diffraction, Hall measurements, optical reflection, and photoluminescence (PL). Particularly, spatially resolved PL intensity images were taken after B-γ-CsSnI(3) was incorporated in the DSSC structure to insure the material integrity. The means of ultraviolet photoemission spectroscopy (UPS) was used to reveal why B-γ-CsSnI(3) could not act as the substitute of liquid electrolyte in the conventional DSSCs. For the completeness, other two related compounds, one is the yellow polymorph of CsSnI(3) and other is Cs(2)SnI(6) with tetravalent tin instead of double-valent tin in CsSnI(3) were also investigated by UPS.
format Online
Article
Text
id pubmed-4223680
institution National Center for Biotechnology Information
language English
publishDate 2014
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-42236802014-11-13 Energy barrier at the N719-dye/CsSnI(3) interface for photogenerated holes in dye-sensitized solar cells Zhang, Jin Yu, Chunhui Wang, Lili Li, Yizhi Ren, Yuhang Shum, Kai Sci Rep Article This report is to address the question if black γ-polymorph of cesium tin tri-iodide (B-γ-CsSnI(3)) can be used as a solid-state hole-transport material in the conventional DSSCs with the N719 dye to replace the liquid electrolyte as reported by I. Chung et al. on Nature 485, 486, (2012). Here we demonstrate rigorously that B-γ-CsSnI(3) is not energetically possible to collect photogenerated holes because of the large energy barrier at the interface of N719/B-γ-CsSnI(3). Therefore, it cannot serve as a hole-transporter for the conventional DSSCs although it is a good hole-conducting material. A solution-based method was employed to synthesize the B-γ-CsSnI(3) polycrystalline thin-films used for this work. These thin-films were then characterized by X-ray diffraction, Hall measurements, optical reflection, and photoluminescence (PL). Particularly, spatially resolved PL intensity images were taken after B-γ-CsSnI(3) was incorporated in the DSSC structure to insure the material integrity. The means of ultraviolet photoemission spectroscopy (UPS) was used to reveal why B-γ-CsSnI(3) could not act as the substitute of liquid electrolyte in the conventional DSSCs. For the completeness, other two related compounds, one is the yellow polymorph of CsSnI(3) and other is Cs(2)SnI(6) with tetravalent tin instead of double-valent tin in CsSnI(3) were also investigated by UPS. Nature Publishing Group 2014-11-07 /pmc/articles/PMC4223680/ /pubmed/25378076 http://dx.doi.org/10.1038/srep06954 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/
spellingShingle Article
Zhang, Jin
Yu, Chunhui
Wang, Lili
Li, Yizhi
Ren, Yuhang
Shum, Kai
Energy barrier at the N719-dye/CsSnI(3) interface for photogenerated holes in dye-sensitized solar cells
title Energy barrier at the N719-dye/CsSnI(3) interface for photogenerated holes in dye-sensitized solar cells
title_full Energy barrier at the N719-dye/CsSnI(3) interface for photogenerated holes in dye-sensitized solar cells
title_fullStr Energy barrier at the N719-dye/CsSnI(3) interface for photogenerated holes in dye-sensitized solar cells
title_full_unstemmed Energy barrier at the N719-dye/CsSnI(3) interface for photogenerated holes in dye-sensitized solar cells
title_short Energy barrier at the N719-dye/CsSnI(3) interface for photogenerated holes in dye-sensitized solar cells
title_sort energy barrier at the n719-dye/cssni(3) interface for photogenerated holes in dye-sensitized solar cells
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4223680/
https://www.ncbi.nlm.nih.gov/pubmed/25378076
http://dx.doi.org/10.1038/srep06954
work_keys_str_mv AT zhangjin energybarrieratthen719dyecssni3interfaceforphotogeneratedholesindyesensitizedsolarcells
AT yuchunhui energybarrieratthen719dyecssni3interfaceforphotogeneratedholesindyesensitizedsolarcells
AT wanglili energybarrieratthen719dyecssni3interfaceforphotogeneratedholesindyesensitizedsolarcells
AT liyizhi energybarrieratthen719dyecssni3interfaceforphotogeneratedholesindyesensitizedsolarcells
AT renyuhang energybarrieratthen719dyecssni3interfaceforphotogeneratedholesindyesensitizedsolarcells
AT shumkai energybarrieratthen719dyecssni3interfaceforphotogeneratedholesindyesensitizedsolarcells