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Phenothiazinedioxide-Conjugated Sensitizers and a Dual-TEMPO/Iodide Redox Mediator for Dye-Sensitized Solar Cells.

Authors :
Lin, Ryan Yeh‐Yung
Chu, Te‐Chun
Chen, Ping‐Wei
Ni, Jen‐Shyang
Shih, Pei‐Chieh
Chen, Yung‐Chung
Ho, Kuo‐Chuan
Lin, Jiann T.
Source :
ChemSusChem; Aug2014, Vol. 7 Issue 8, p2221-2229, 9p
Publication Year :
2014

Abstract

Metal-free dyes containing a phenothiazinedioxide entity in the spacer were synthesized. The best conversion efficiency (7.47 %) of the dye-sensitized solar cell (DSSC) by using new sensitizers with chenodeoxycholic acid as a co-adsorbent and the I<superscript>−</superscript>/I<subscript>3</subscript><superscript>−</superscript> electrolyte reached over 90 % of that of the standard N719-based cell (8.10 %). A new type of ionic liquid containing the nitroxide radical (NO<superscript>.</superscript>) and iodide was successfully synthesized and applied to the DSSCs. If the I<superscript>−</superscript>/I<subscript>3</subscript><superscript>−</superscript> electrolyte was replaced with a dual redox electrolyte, that is, a TEMPO (2,2,6,6-tetramethylpiperidin-1-oxyl) derivative with a dangling imidazolium iodide entity, the cell exhibited a high open-circuit voltage of 0.85 V and a cell efficiency of 8.36 %. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
18645631
Volume :
7
Issue :
8
Database :
Complementary Index
Journal :
ChemSusChem
Publication Type :
Academic Journal
Accession number :
97428059
Full Text :
https://doi.org/10.1002/cssc.201402160