研究目的
Investigating the use of lead-free perovskite in highly sensitive photodetectors with vertical heterojunctions to address the health and environmental problems caused by lead in organic-inorganic lead halide perovskites.
研究成果
The study successfully demonstrates high-performance lead-free perovskite photodetectors with vertical heterojunctions, showing high responsivity, gain, and detectivity. The devices also exhibit excellent bending stability on flexible substrates, paving the way for environmentally friendly, low-cost, and sensitive photodetectors.
研究不足
The study is limited by the challenge of preparing stable lead-free perovskite materials and the trade-off between gain and response time in the devices.
1：Experimental Design and Method Selection
The study involves the fabrication of photodetectors with a tin-based perovskite/PEDOT:PSS vertical heterojunction. The methodology includes the preparation of perovskite films, deposition of electrodes, and characterization of the device's optoelectronic properties.
2：Sample Selection and Data Sources
Samples include FASnI3 perovskite films and PEDOT:PSS layers on SiO2/Si or PI substrates. Data sources include measurements of photo-current, responsivity, gain, and detectivity under various light intensities and wavelengths.
3：List of Experimental Equipment and Materials
Equipment includes X-Ray diffractometer, SEM, spectrophotometer, fluorescence spectrophotometer, and semiconductor characterization system. Materials include Tin(II) Iodide, Formamidinium iodide, PEDOT:PSS aqueous solution, and N,N-dimethylformamide.
4：Experimental Procedures and Operational Workflow
The workflow involves substrate preparation, electrode deposition, PEDOT:PSS and perovskite film formation, and device characterization under controlled light conditions.
5：Data Analysis Methods
Data analysis involves calculating responsivity, gain, detectivity, and analyzing the transient behavior of the devices using statistical techniques and software tools.
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