研究目的
Investigating the photovoltaic response of cells with an active layer of heterocyclic azo dyes differing in the type of substituent to change the power efficiency of the device.
研究成果
The study demonstrated that heterocyclic azo dyes with different substituents can effectively modify the power efficiency of photovoltaic devices. The best photovoltaic properties were observed for cells with specific azo dyes, showing potential for future applications after further optimization.
研究不足
The study is limited by the power efficiency of the devices being less than 1%, indicating a need for optimization of optical and electrical properties as well as morphology improvement of active layers for future applications.
1：Experimental Design and Method Selection:
The study involved the preparation of photovoltaic cells using heterocyclic azo dyes with various substituents as an active layer. The methodology included the synthesis of azo dyes, fabrication of organic bulk heterojunction photovoltaic cells, and measurement of current density-voltage characteristics under illumination.
2：Sample Selection and Data Sources:
Six heterocyclic azo dyes with different substituents (CH3, OCH3, Br) were synthesized and used as components of the active layer in photovoltaic cells.
3：List of Experimental Equipment and Materials:
Spectroscopic ellipsometer Woollam M2000, spin-coating technique for layer deposition, current source Keithley 2400 SourceMeter for J-U characteristics.
4：Experimental Procedures and Operational Workflow:
The cells were fabricated on ITO-coated glass substrates, with layers deposited using spin-coating, and characterized under illumination.
5：Data Analysis Methods:
The photovoltaic parameters (JSC, VOC, FF, η) were determined from the J-U curves, and theoretical DFT calculations supported the experimental findings.
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