研究目的
Investigating the atomic layer deposition of amorphous antimony sulfide (a-Sb2S3) as a semiconductor sensitizer in extremely thin absorber solar cells to enhance photovoltaic performance.
研究成果
The study successfully demonstrates the ALD of a-Sb2S3 as a semiconductor sensitizer in ETA solar cells, achieving power conversion efficiencies of 0.5% for a-Sb2S3 and 1.9% for annealed c-Sb2S3 under 1 sun illumination. The modified showerhead reactor configuration improves conformality on porous TiO2 scaffolds, addressing a key bottleneck in ETA solar cell fabrication. The findings highlight the potential of ALD-grown a-Sb2S3 in photovoltaic applications, with room for further optimization to reduce interfacial defects and enhance device performance.
研究不足
The study identifies low but non-negligible density of interfacial electronic defects at the sensitizer/TiO2 interface, which could limit charge injection efficiency. The conformality of a-Sb2S3 on highly porous TiO2 scaffolds requires modification of the reactor configuration, indicating potential challenges in scaling up the process.
1：Experimental Design and Method Selection:
The study employs atomic layer deposition (ALD) with alternating exposures of TDMASb and H2S at 150 °C in a custom-built viscous flow reactor. In situ quartz crystal microbalance (QCM) and in situ Fourier Transform Infrared spectroscopy (FTIR) are used to study the deposition chemistry and growth mechanism. Quantum mechanical density functional theory (DFT) calculations support the experimental findings.
2：Sample Selection and Data Sources:
The study uses mesoporous TiO2 scaffolds as the substrate for ALD growth of a-Sb2S3. Data is collected from in situ QCM, FTIR, XPS, SEM, TEM, and photovoltaic device performance measurements.
3：Data is collected from in situ QCM, FTIR, XPS, SEM, TEM, and photovoltaic device performance measurements.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Custom-built viscous flow reactor, TDMASb, H2S, in situ QCM, FTIR spectrometer, XPS, SEM, TEM, Kelvin probe, solar simulator.
4：Experimental Procedures and Operational Workflow:
ALD of a-Sb2S3 is performed with a pulsing sequence of TDMASb and H2S. The growth mechanism is characterized by in situ QCM and FTIR. The material is then used in ETA solar cells with TiO2 and Spiro-OMeTAD as ETL and HTL, respectively.
5：2S. The growth mechanism is characterized by in situ QCM and FTIR. The material is then used in ETA solar cells with TiO2 and Spiro-OMeTAD as ETL and HTL, respectively.
Data Analysis Methods:
5. Data Analysis Methods: Data from QCM and FTIR is analyzed to understand the growth mechanism. XPS and UPS are used for compositional and band position analysis. Photovoltaic performance is evaluated using J-V characteristics under AM 1.5 illumination.
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
