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Aerosol OT/Water System Coupled with Triiodide/Iodide (I 3 − /I − ) Redox Electrolytes for Highly Efficient Dye‐Sensitized Solar Cells
Author(s) -
Kong EuiHyun,
Lim Jongchul,
Chang YongJune,
Yoon YeonHee,
Park Taiho,
Jang Hyun Myung
Publication year - 2013
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201300275
Subject(s) - triiodide , redox , iodide , electrolyte , materials science , dye sensitized solar cell , kinetics , context (archaeology) , energy conversion efficiency , photochemistry , inorganic chemistry , chemistry , electrode , physics , optoelectronics , paleontology , quantum mechanics , biology
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 ∼11% for ∼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.