Cobalt-Based Electrolytes for Efficient Flexible Dye-Sensitized Solar Cells

Title
Cobalt-Based Electrolytes for Efficient Flexible Dye-Sensitized Solar Cells
Authors
김동영김지헌이호림김세현서용석
Keywords
cobalt-based electrolyte; flexible; dye sensitized solar cell
Issue Date
2019-02
Publisher
MRS Advances
Citation
VOL 4, NO 8-489
Abstract
We have developed new flexible dye-sensitized solar cells (DSSCs) comprising organic dye (JH-1), cobalt redox electrolyte and hierarchically structured TiO2 (HS-TiO2) photoelectrode prepared using an electrostatic spray method. The performance of JH-1 sensitized flexible DSSC with a cobalt redox electrolyte was compared with those of N719-based DSSC and DSSC with I-/ I3- redox electrolyte. As a result, JH-1 sensitized flexible DSSC with [Co( ൗ ൖ )(bpy-pz)3](PF6)3/2 redox system exhibited a high photocurrent density of 9.17 mA cm-2, an open circuit voltage of 0.953 V, a fill factor of 0.70, and a power conversion efficiency of 6.12% under 1 sun illumination (100 mW cm-2). The incident photon-to-current conversion efficiency was measured to explain the photocurrent generation difference by different dyes and electrolytes. The electron recombination lifetime of cells was measured by intensity-modulated photovoltage spectroscopy. Mass transport in DSSCs employing cobalt redox electrolytes was also investigated by the photocurrent transient measurements and electrochemical impedance spectroscopy (EIS) analysis. https
URI
http://pubs.kist.re.kr/handle/201004/70812
ISSN
2059-8521
Appears in Collections:
KIST Publication > Article
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