研究目的
To develop transparent, carbon-based counter electrodes for high-performance bifacial dye-sensitized solar cells (DSSCs) that exhibit outstanding electrocatalytic activity, electrical conductivity, and electrochemical stability, as well as high transparency.
研究成果
The study successfully developed transparent, tellurium-doped mesoporous carbon counter electrodes for bifacial DSSCs, demonstrating high power conversion efficiencies under both front and rear side irradiations. The TeMC CEs exhibited outstanding electrocatalytic activity, electrical conductivity, and electrochemical stability, with high transparency. This advancement suggests potential for more stable and effective bifacial DSSC development without compromising photovoltaic performance.
研究不足
The study acknowledges that the TeMC CE, while showing high performance, had slightly lower transmittance than Pt CEs, which affected the rear side irradiation performance of bifacial DSSCs. Additionally, the electrochemical stability and scalability of the TeMC materials for industrial applications were not extensively explored.
1：Experimental Design and Method Selection:
The study involved the preparation of tellurium-doped, mesoporous carbon (TeMC) materials through a simple stabilization and carbonization method in the presence of a tellurium metalloid. Various TeMC materials with different carbonization temperatures were prepared to optimize the performance of the counter electrodes (CEs).
2：Sample Selection and Data Sources:
The TeMC materials were prepared by pyrolysis of the polyacrylonitrile-block-poly (n-butyl acrylate) (PAN-b-PBA) block copolymer mixed with tellurium powder. The materials were then washed to remove unreacted tellurium.
3：List of Experimental Equipment and Materials:
Materials included N-butyl acrylate, α, α'-azoisobutyronitrile, CuBr2, ethyl α-bromoisobutyrate, acrylonitrile, 2,2’-bipyridyl, CuCl, Al2O3, dimethylformamide, dimethyl sulfoxide, ethanol, toluene, methanol, and tellurium, all obtained from Sigma-Aldrich.
4：Experimental Procedures and Operational Workflow:
The PAN-b-PBA copolymer was mixed with tellurium powder, stabilized under an air atmosphere, and carbonized at different temperatures under a nitrogen atmosphere. The resultant materials were washed with HCl and KOH solutions to remove unreacted tellurium. The TeMC electrodes were prepared by an electrospray method, and their performance was evaluated through dummy cell tests and applied in bifacial DSSC devices.
5：Data Analysis Methods:
The electrocatalytic activity of the TeMC materials was evaluated through electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and Tafel-polarization plots. The performance of the DSSC devices was assessed by measuring the current–voltage (J–V) characteristics and incident photon-to-current conversion efficiency (IPCE).
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