研究目的
Investigating the use of an inorganic salt SbCl3 for post-treatment on Sb2S3 films to reduce surface defects and improve the open-circuit voltage (VOC) and power conversion efficiency (PCE) of Sb2S3 planar thin film solar cells.
研究成果
The incorporation of a SbCl3 layer on Sb2S3 films effectively passivates surface traps and reduces nonradiative recombination, leading to a significant improvement in VOC and PCE of Sb2S3 planar solar cells. A champion PCE of 7.1% was achieved, which is the highest value reported for Sb2S3 planar solar cells. The SbCl3-treated devices also exhibited enhanced stability, maintaining 90% of their initial PCE after 1080 h under ambient humidity at room temperature. This work provides an efficient interface strategy for high-performance and stable Sb2S3 planar solar cells.
研究不足
The study focuses on the passivation effect of SbCl3 on Sb2S3 films and its impact on solar cell performance. The research does not explore the long-term stability under varying environmental conditions beyond ambient humidity and room temperature. Additionally, the study does not investigate the scalability of the fabrication process for industrial applications.
1：Experimental Design and Method Selection:
The study involved the spin-coating of a SbCl3 ethanol solution onto the Sb2S3 surface to introduce a passivation layer. The final structure of the Sb2S3 planar devices was FTO/TiO2 (~40 nm)/SbCl3-treated Sb2S3 (~146 nm)/Spiro-OMeTAD (~125 nm)/Au.
2：Sample Selection and Data Sources:
The Sb2S3 precursor solution was obtained according to a previously reported method. A SbCl3 solution was prepared by dissolving a certain amount of SbCl3 into ethanol.
3：List of Experimental Equipment and Materials:
Field-emission scanning electron microscope (FEI Helios G4 CX), X-ray diffractometer (SHIMADZU 7000), UV–vis–NIR spectrophotometer (Lambda 35, Perkin-Elmer), Raman spectrometer (Renishaw inVia), and others.
4：Experimental Procedures and Operational Workflow:
The FTO glass substrates were cleaned and treated with UV ozone before spin-coating the TiO2 solution. The Sb2S3 precursor solution was spin-coated on the TiO2 layer, and the substrate was heated. The SbCl3 solution was then spin-coated on the Sb2S3 film, followed by annealing. The Spiro-OMeTAD solution was deposited, and finally, the Au electrode was thermally evaporated.
5：Data Analysis Methods:
The performances of the control and the SbCl3-treated devices were investigated through J–V characteristics, absorption coefficient measurements, IPCE spectra, and others.
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
