研究目的
Investigating the potential of tellurium iodide (TeI4) as a light-absorbing material in solution-processed photovoltaic applications to replace toxic lead halide in solar cells.
研究成果
TeI4 demonstrates promising potential as a light-absorbing material in lead-free solar cells, achieving a PCE of up to 3.56%. Fabrication parameters, especially heat treatment, significantly impact performance, suggesting areas for further optimization.
研究不足
The conduction band of TeI4 is deeper than the LUMO of PCBM, which may limit further efficiency improvements. Heat treatment and antisolvent dripping negatively affected device performance, indicating sensitivity to fabrication parameters.
1：Experimental Design and Method Selection:
The study focused on demonstrating TeI4 as a light-absorbing material in solar cells, utilizing its suitable optical band gap and active lone-pair electron orbital in Te4+.
2：4+. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: TeI4 was used as the light-absorbing layer in solar cells, with different concentrations and solvents tested for optimal performance.
3：List of Experimental Equipment and Materials:
Instruments included XRD for layer investigation, SEM for surface morphology, UV-vis spectroscopy for optical properties, and a Keithley 2400 source meter for J-V curve measurement.
4：Experimental Procedures and Operational Workflow:
Devices were fabricated by spin-casting TeI4 solution on PEDOT:PSS layers, followed by PCBM solution and Ag electrode evaporation.
5：Data Analysis Methods:
Performance was evaluated based on power conversion efficiency (PCE), with UV-vis absorption and J-V curves analyzed.
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