研究目的
Investigating the role of nanowire length on the performance of self-driven NIR photodetector based on mono/bi-layer graphene (camphor)/Si-Nanowire Schottky junction.
研究成果
The study successfully demonstrates the fabrication of high-performance NIRPDs using camphor-based MLG sheets on SiNWAs. The optimized device with 30 min etched SiNWAs shows superior performance in terms of responsivity, detectivity, and response time, making it a promising candidate for future optoelectronic applications. The research highlights the potential of using natural carbon sources like camphor for graphene synthesis and the importance of nanowire length in enhancing photodetector performance.
研究不足
The study is limited by the surface trap states at MLG/SiNWAs interfaces for longer NW lengths, which can degrade device performance. Additionally, the stability of devices at higher bias voltages (3V and 4V) is not optimal.
1：Experimental Design and Method Selection:
The study involves the fabrication of Si-nanowire arrays (SiNWAs) of varying lengths by etching and the synthesis of mono/bi-layer graphene (MLG) sheets using camphor as a solid carbon source via atmospheric chemical vapour deposition (APCVD) process. The MLG sheets are then transferred onto SiNWAs to form Schottky junction photodetectors.
2：Sample Selection and Data Sources:
The samples include planar Si and SiNWAs with varying etching times (15 min, 30 min, and 60 min) to study the effect of nanowire length on photodetector performance.
3：List of Experimental Equipment and Materials:
Equipment includes field emission scanning electron microscopy (FESEM) for surface morphology, TEM and SAED for structural analysis, UV-Vis spectrophotometer for optical studies, and a probe station for electrical characterization. Materials include camphor as a carbon source, Si wafers, and Ag for electrodes.
4：Experimental Procedures and Operational Workflow:
The process involves the synthesis of MLG on Cu foil, transfer onto SiNWAs, fabrication of Schottky junction devices, and characterization of their photoresponse under NIR illumination.
5：Data Analysis Methods:
The performance of the photodetectors is evaluated based on responsivity, detectivity, and response time, with data analyzed using statistical techniques and software tools.
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
