研究目的
Investigating the use of polycrystalline La substituted bismuth iron oxide, Bi1?xLaxFeO3, films as the light harvesting component in photovoltaic cells to enhance efficiency.
研究成果
The study demonstrates that non-ferroelectric Bi1?xLaxFeO3 compositions (x ≥ 0.2) combined with appropriate contacts can significantly improve the power conversion efficiency of photovoltaic devices. The findings suggest a link between crystal structure and photovoltaic performance, offering insights for the development of more efficient, inorganic solid-state solar cells.
研究不足
The study is limited by the relatively low power conversion efficiency of the devices and the narrow spectral response of the photocurrent, which is attributed to the bandgap of the perovskite films. Further improvements in bandgap engineering and charge transport are needed to enhance performance.
1：Experimental Design and Method Selection
The study utilized a novel cell set-up with a double layered TiO2 film as top contact and a thin layer of quasi-solid polymer electrolyte as back contact. The methodology involved the synthesis of Bi1?xLaxFeO3 precursor powders via a co-precipitation solution route, preparation of quasi-solid polymer electrolytes, and fabrication of photo-electrodes on FTO coated glass substrates.
2：Sample Selection and Data Sources
Samples with different precursor compositions of Bi1?xLaxFeO3 (x = 0.1, 0.2, 0.3, and 0.4) were prepared. The performance of these samples was evaluated under 1 sun irradiation.
3：List of Experimental Equipment and Materials
Equipment included a Bruker D8 Advance diffractometer for PXRD, a Phenom G2 scanning electron microscope for SEM images, and a LOT-Oriel GmbH solar simulator for I-V characterization. Materials included nitrates of bismuth, lanthanum, and iron, TiO2 powders (P25 and P90), and various chemicals for electrolyte preparation.
4：Experimental Procedures and Operational Workflow
The procedure involved the synthesis of Bi1?xLaxFeO3 precursor powders, preparation of quasi-solid polymer electrolytes, fabrication of photo-electrodes on FTO coated glass, assembly of the solar cells, and characterization of their photovoltaic performance.
5：Data Analysis Methods
The photovoltaic performance was analyzed based on current-voltage (I-V) characteristics, with parameters such as short circuit current density (Jsc), open circuit voltage (Voc), fill factor (ff), and efficiency (η) calculated from the data.
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
