研究目的
Investigating the influence of NiO nano-particles on the performance of P3HT:PCBM-based thin film organic solar cells (TFOSC).
研究成果
The incorporation of NiO nano-particles in the P3HT:PCBM blend active layer was found to be favourable for solar energy harvesting, with the power conversion efficiency growing by over 140% at optimum concentration of NiO compared to the pristine type of devices. Significant improvements were also recorded in the solar cell fill factor (FF) and short circuit current density (JSC). However, higher concentrations of NiO lead to decreased performance due to structural deformation and defect clusters.
研究不足
The study notes that as the concentration of NiO increases, the absorption and optical density range decreases due to increased conductivity of the active medium, which presumably leads to increased band gap. High concentration of NiO could lead to the incorporation of more oxygen atoms in the active layer, creating structural deformation and defect clusters that constrain the process of charge dissociation and separation.
1：Experimental Design and Method Selection:
The study employed NiO nano-particles as dopants in P3HT:PCBM blend photo-active medium to enhance solar energy harvesting.
2：Sample Selection and Data Sources:
Unpaterned ITO-coated glass substrates with sheet resistance of 15/sq were used. The photo-active layers were prepared from P3HT:PCBM blend in chloroform based solution at 1:1 ratio by weight.
3：List of Experimental Equipment and Materials:
ITO-coated glass substrates, P3HT:PCBM blend, NiO nano-particles, chloroform, LiF, Al, thermal vacuum deposition unit (Edward Auto306 deposition unit), UV-vis absorption spectrometer (T80-PG-Instrument limited), Keithley HP2420 source meter, AM
4：5 solar simulator (model SS50AAA). Experimental Procedures and Operational Workflow:
The substrates were cleaned and etched, followed by the deposition of the active layer by spin coating. The electron transport layer (LiF) and the top electrodes (Al) were deposited by thermal vacuum deposition. The devices were characterized electrically under a solar simulator.
5：Data Analysis Methods:
The optical properties of the thin film photo-active layers were studied using UV-vis absorption spectra. The charge transport properties were analyzed using space charge limited current measured under dark condition.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
