Self-Powered Solar-Blind Photodetector with Fast Response Based on Au/β-Ga2O3 Nanowires Array Film Schottky Junction

ACS Applied Materials & Interfaces
Xing ChenDe-Zhen Shen

Abstract

Because of the direct band gap of 4.9 eV, β-Ga2O3 has been considered as an ideal material for solar-blind photodetection without any bandgap tuning. Practical applications of the photodetectors require fast response speed, high signal-to-noise ratio, low energy consumption and low fabrication cost. Unfortunately, most reported β-Ga2O3-based photodetectors usually possess a relatively long response time. In addition, the β-Ga2O3 photodetectors based on bulk, the individual 1D nanostructure, and the film often suffer from the high cost, the low repeatability, and the relatively large dark current, respectively. In this paper, a Au/β-Ga2O3 nanowires array film vertical Schottky photodiode is successfully fabricated by a simple thermal partial oxidation process. The device exhibits a very low dark current of 10 pA at -30 V with a sharp cutoff at 270 nm. More interestingly, the 90-10% decay time of our device is only around 64 μs, which is much quicker than any other previously reported β-Ga2O3-based photodetectors. Besides, the self-powering, the excellent stability and the good reproducibility of Au/β-Ga2O3 nanowires array film photodetector are helpful to its commercialization and practical applications.

References

Jul 14, 2006·Nature·Gerasimos KonstantatosEdward H Sargent
Jan 1, 2010·Sensors·Kewei LiuMasakazu Aono
Dec 21, 2013·Chemical Society Reviews·Xi WangDmitri Golberg

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Citations

Jan 10, 2017·Scientific Reports·Linpeng DongYuming Zhang
Oct 11, 2017·Small·Wei TianLiang Li
Mar 4, 2020·Optics Express·Ruifan TangYoudou Zheng
Nov 27, 2018·ACS Applied Materials & Interfaces·Cunhua XuFeng Huang
May 1, 2018·ACS Applied Materials & Interfaces·Rohit PantS B Krupanidhi
Jun 30, 2019·ACS Applied Materials & Interfaces·Pedram GhamgosarAlberto Vomiero
Dec 23, 2016·ACS Applied Materials & Interfaces·Daoyou GuoWeihua Tang
Nov 28, 2017·ACS Applied Materials & Interfaces·Gwenhivir Wyatt-MoonThomas D Anthopoulos
Jan 12, 2021·ACS Applied Materials & Interfaces·Jiawen ChenXiaoping Ouyang

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