研究目的
To present a dye-sensitized solar cell-thermoelectric hybrid generator (DS-TEG) that hybridizes a dye-sensitized solar cell (DSSC) and a thermoelectric generator (TEG) at the material level, aiming to improve the power conversion efficiency (PCE) by promoting the reduction rate of the redox couple and utilizing bipolar conduction.
研究成果
The PCE of the conventional DSSC was significantly improved in the DS-TEG by promoting the reduction rate of the redox couple and the utilization of bipolar conduction. The PCE of the DS-TEG was increased by 2.7%, which is a 33.3% improvement over the conventional DSSC. The study demonstrates that the current limitation of the PCE in a DSSC can be overcome through material hybridization with a TE element.
研究不足
The PCE of the unified DS-TEG implemented in this work is low compared to the DSSC with a current record high PCE. The study focuses on overcoming the fundamental problem of DSSC using material hybridization with a TE element rather than aiming to implement a DSSC with record high PCE.
1：Experimental Design and Method Selection:
The DS-TEG was designed by replacing the cathode of the DSSC with a Pt-coated thermoelectric (TE) element to promote a synergetic effect during contact between the TE element and the electrolyte.
2：Sample Selection and Data Sources:
The DSSC part was fabricated onto patterned FTO and filled with iodide/triiodide electrolyte after TiO2 film formation.
3：List of Experimental Equipment and Materials:
A Ni layer together with a Cr/Au adhesion layer was used to lower the electrical contact resistance between the thermoelectric element and the Pt layer. AZO-dyed acrylic film was used as a photo-thermal conversion layer.
4：Experimental Procedures and Operational Workflow:
The boundary between the DSSC part and the TE element was sealed using a thermo-plastic material. Photo-voltage transient decay measurements were taken to verify the role of the TE element in the DS-TEG.
5：Data Analysis Methods:
The electron recombination lifetime, diffusion coefficient, and effective diffusion length were calculated from the transient decay measurements.
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