研究目的
Investigating the enhancement of photoresponse performance in ZnO nanorod array/p-GaN self-powered ultraviolet photodetectors by coupling with CuO nanostructures.
研究成果
The ZnO NRAs/CuO CLNs/p-GaN heterostructures exhibit stable and repeatable self-powered photoresponse with significantly enhanced performance compared to ZnO NRAs/p-GaN heterojunction PD. The coupling with CuO CLNs increases the responsivity and specific detectivity, and decreases the response time, indicating great application potential in high-performance self-powered UV PDs.
研究不足
The study focuses on the enhancement of photoresponse performance by coupling with CuO CLNs but does not explore the scalability of the fabrication process or the long-term stability of the devices under continuous operation.
1：Experimental Design and Method Selection:
The study employed a low-temperature hydrothermal method to prepare ZnO NRAs coupled with CuO CLNs and fabricated self-powered UV PDs based on ZnO NRAs/CuO CLNs/p-GaN heterostructure via a direct-contact method.
2：Sample Selection and Data Sources:
Fluorinated tin oxide (FTO) glass was used as the substrate for ZnO NRAs, and p-GaN wafers were used for device assembly.
3：List of Experimental Equipment and Materials:
FE-SEM (SU8010, Hitachi), XRD (D8 Advance, Bruker Axs), TEM (Tecnai G2 F20, FEI), Source Meter (Keithley 2450), UV LED (365 nm, CEL-LED 100HA, Beijing China Education Au-light Co., Ltd).
4：Experimental Procedures and Operational Workflow:
The preparation involved cleaning FTO substrates, preparing ZnO seed layers by sol-gel method, hydrothermal growth of ZnO NRAs, preparation of CuO CLNs, device assembly, and characterization.
5：Data Analysis Methods:
The photoresponse properties and current-voltage (I-V) characteristics of the UV PDs were investigated, and the mechanism was discussed through the energy band diagram.
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TEM
Tecnai G2 F20
FEI
Determination of the morphology and crystalline structure
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Source Meter
Keithley 2450
Keithley
Recording of the I-V curves and photoresponse properties of the devices
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FE-SEM
SU8010
Hitachi
Investigation of the morphology of the samples
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XRD
D8 Advance
Bruker Axs
Characterization of the crystallinity of the samples
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UV LED
CEL-LED 100HA
Beijing China Education Au-light Co., Ltd
UV light source system with tunable output power
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