研究目的
Investigating the positive charge carriers transport properties in a bulk heterojunction organic photovoltaic cell using two different Anode Buffer Layers (PEDOT:PSS and MoO3).
研究成果
The mobility values of positive charge carriers in the BHJ devices with the blend of P3HT:PCBM were determined with PEDOT:PSS and MoO3 as ABLs. The device with higher mobility exhibits better performance, indicating the importance of carrier mobility in the OPV performance.
研究不足
The study was conducted without following any encapsulation conditions and glove boxes, which may affect the reproducibility and stability of the results. The presence of leakage currents in the devices may also influence the power conversion efficiency under illumination.
1：Experimental Design and Method Selection:
The study uses the Space Charge Limited Current (SCLC) method to compute the hole mobilities in organic photovoltaic cells with different Anode Buffer Layers (ABLs).
2：Sample Selection and Data Sources:
Organic photovoltaic cells were constructed onto ITO coated glass substrate with P3HT and PCBM as the electron donor and acceptor respectively.
3：List of Experimental Equipment and Materials:
ITO coated glass, PEDOT:PSS, MoO3, P3HT, PCBM, Al, dichloro benzene, Isopropyl Alcohol, Hellmanex solution, UV ozone cleaner, Kethely Source meter, solar simulator.
4：Experimental Procedures and Operational Workflow:
The ITO substrate was cleaned and treated with PEDOT:PSS or MoO3 as ABL, followed by spin coating of P3HT:PCBM blend and vapor deposition of Al cathode. The dark current versus voltage characteristics were measured.
5：Data Analysis Methods:
The mobility values were calculated from the J-V characteristics using the SCLC theory.
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ITO coated glass
Sigma Aldrich
Substrate for the organic photovoltaic cells
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PEDOT:PSS
Anode Buffer Layer for positive charge carriers transport
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MoO3
Anode Buffer Layer for positive charge carriers transport
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P3HT
Electron donor in the organic photovoltaic cell
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PCBM
Electron acceptor in the organic photovoltaic cell
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Al
Cathode in the organic photovoltaic cell
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Kethely Source meter
Measurement of dark current versus voltage characteristics
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solar simulator
Measurement of dark current versus voltage characteristics
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