研究目的
Development of a cost effective, Pt-free, carbon based nanocomposite as counter electrode catalyst for dye sensitized solar cells.
研究成果
The study successfully demonstrated the reduction of graphene oxide into reduced graphene oxide using artificial sunlight and the fabrication of a cost-effective, transparent all-carbon composite counter electrode for DSSCs. The test cells with SWCNH/SSrGO counter electrodes showed a power conversion efficiency of 8.27%, and the DSSC module exhibited an efficiency of 5.18%. The integration of the DSSC module with a standard Si solar cell achieved a higher open circuit voltage, indicating potential for various real-time applications.
研究不足
The study focuses on the development of a Pt-free counter electrode for DSSCs, but the efficiency of the fabricated DSSC module (5.18%) is lower than that of the test cell (8.27%). Further optimization may be needed to improve the scalability and efficiency of large area DSSC modules.
1：Experimental Design and Method Selection:
The study involved the synthesis of reduced graphene oxide (SSrGO) by irradiating graphene oxide (GO) with light from a Xe source. The SSrGO was then spray coated onto fluorine doped tin oxide (FTO) coated glass substrates, followed by a spray coat of single walled carbon nanohorns (SWCNH) suspension in DMF.
2：Sample Selection and Data Sources:
The materials used included graphene oxide, single walled carbon nanohorns, and fluorine doped tin oxide coated glass substrates.
3：List of Experimental Equipment and Materials:
Equipment included a solar simulator (Peccell Inc., Japan, Model PECL01), X-ray diffractometer (Rigaku, Japan), Raman Spectrometer (Lab Ram, HORIBA JOBIN YVON), and UV–Vis-NIR Spectrophotometer (Carry 5000, Agilent Technologies). Materials included GO, SWCNH, DMF, and FTO coated glass substrates.
4：Experimental Procedures and Operational Workflow:
The GO was reduced to SSrGO using a solar simulator. The SSrGO and SWCNH were then spray coated onto FTO glass substrates to form counter electrodes. These electrodes were used to fabricate DSSC test cells and modules.
5：Data Analysis Methods:
The performance of the DSSCs was evaluated using cyclic-voltammetry, Tafel polarization studies, and electrochemical impedance spectroscopy.
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