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Aerosol OT/Water System Coupled with Triiodide/Iodide (I-3(-)/I-) Redox Electrolytes for Highly Efficient Dye-Sensitized Solar Cells

Title
Aerosol OT/Water System Coupled with Triiodide/Iodide (I-3(-)/I-) Redox Electrolytes for Highly Efficient Dye-Sensitized Solar Cells
Authors
Eui-Hyun KongJongchul LimYong-June ChangYeon-Hee YoonPark, TJang, HM
POSTECH Authors
Park, TJang, HM
Date Issued
2013-05
Publisher
Wiley
Abstract
Dye-sensitized solar cells (DSCs) are considered to be a promising alternative to Si-based photovoltaic cells. The electrolyte of the DSC primarily uses triiodide/iodide (I-3(-)/I-) as a redox couple. Therefore, it is essential to understand the regeneration and recombination kinetics of the I-3(-)/I- redox couples in the device. In this context, controlling the total and local concentrations of the I-3(-)/I- redox couples is an important parameter that can influence the DSC performance. Here, we propose that the introduction of a sodium bis (2-ethylhexyl) sulfosuccinate (AOT)/water system to the I-3(-)/I- electrolyte enables the control of the concentration of the redox couples, which consequently achieves a high power conversion efficiency of similar to 11% for similar to 1000 h (under 1 sun illumination) owing to the enhanced dye-regeneration efficiency and the reduced recombination rate. This novel concept assists in the comprehension of the regeneration and recombination kinetics and develops highly efficient DSCs.
Keywords
CHARGE-COLLECTION EFFICIENCY; NANOCRYSTALLINE TIO2; RECOMBINATION; MICELLES; PERFORMANCE; SURFACTANT; FILMS; ION
URI
https://oasis.postech.ac.kr/handle/2014.oak/14748
DOI
10.1002/AENM.201300275
ISSN
1614-6832
Article Type
Article
Citation
Advanced Energy Materials, vol. 3, no. 10, page. 1344 - 1350, 2013-05
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장현명JANG, HYUN MYUNG
Div of Advanced Materials Science
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