研究目的
To study the light conversion efficiency of organic photovoltaic cells with an inkjet-printed graphene oxide layer and its reduced form as a hole-extracting, electron blocking layer.
研究成果
The implementation of GO and variously reduced GO layers as hole-extraction layers in BHJ solar cells based on DPP(TBFu)2:PC60BM blend showed a decrease in photovoltaic conversion efficiency. The reduction of GO further lowered the performance, attributed to inefficient charge carrier collection and inappropriate work function of the hole transport layer.
研究不足
The use of GO and its reduced forms negatively affected the device performance, indicating inefficient charge carrier collection. The exact thickness of GO layer and the extent of its reduction need optimization for better efficiency.
1：Experimental Design and Method Selection:
The study involves the use of graphene oxide as a hole-extracting layer in organic solar cells, with various reduction methods applied to the GO layer.
2：Sample Selection and Data Sources:
Organic solar cells based on DPP(TBFu)2:PC60BM blend were fabricated with and without GO/rGO layers.
3：List of Experimental Equipment and Materials:
Includes solar simulator, impedance analyzer, and materials like PEDOT:PSS, PC60BM, chloroform, DPP(TBFu)2, and Al.
4：Experimental Procedures and Operational Workflow:
GO layers were deposited by inkjet printing and reduced chemically, thermally, or by UV light. Solar cells were then characterized by current-voltage measurements and impedance spectroscopy.
5：Data Analysis Methods:
Power conversion efficiency was evaluated, and impedance spectroscopy was used to analyze charge transport properties.
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PEDOT:PSS
Heraeus
Used as a hole transport layer in organic solar cells.
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PC60BM
Sigma-Aldrich
Used in the photoactive layer of organic solar cells.
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chloroform
Sigma-Aldrich
Solvent for preparing the photoactive layer solution.
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DPP(TBFu)2
Used in the photoactive layer of organic solar cells.
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Al
Sigma-Aldrich
Used as electrodes in the solar cells.
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UV-A lamp
Sylvania Lynx-S BL368
Sylvania
Used for UV exposure reduction of GO layers.
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solar simulator
Used for power conversion efficiency measurements under standard conditions.
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Impedance/Gain-Phase Analyzer
Solartron SI 1260
Solartron
Used for impedance spectroscopy and capacitance-voltage measurements.
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Dielectric Interface
Solartron 1296
Solartron
Used in conjunction with the impedance analyzer for measurements.
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