ZnO UV Photodetectors Modified by Ag Nanoparticles Using All-Inkjet-Printing

Hsiang-Chun Wang; Yuehua Hong; Zhangwei Chen; Changshi Lao; Youming Lu; Zhichao Yang; Youhua Zhu; Xinke Liu

doi:10.1186/s11671-020-03405-x

ZnO UV Photodetectors Modified by Ag Nanoparticles Using All-Inkjet-Printing

Nanoscale Res Lett. 2020 Sep 4;15(1):176. doi: 10.1186/s11671-020-03405-x.

Authors

Hsiang-Chun Wang^{1

2}, Yuehua Hong¹, Zhangwei Chen³, Changshi Lao³, Youming Lu¹, Zhichao Yang⁴, Youhua Zhu⁵, Xinke Liu⁶

Affiliations

¹ College of Materials Science and Engineering, Shenzhen University-Hanshan Normal University Post Doctoral Workstation, Shenzhen University, Shenzhen, 518060, China.
² College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China.
³ Additive Manufacturing Institute, Shenzhen University, Shenzhen, 518060, China.
⁴ Dongguan South Semiconductor Technology Co., Ltd, Dongguan, 523000, China.
⁵ School of Information Science and Technology, Nantong University, Nantong, 226019, China.
⁶ College of Materials Science and Engineering, Shenzhen University-Hanshan Normal University Post Doctoral Workstation, Shenzhen University, Shenzhen, 518060, China. xkliu@szu.edu.cn.

Abstract

To further improve the performance of all-inkjet-printing ZnO UV photodetector and maintain the advantages of inkjet printing technology, the inkjet printing Ag nanoparticles (NPs) were deposited on the inkjet printing ZnO UV photodetector for the first time. The inkjet printing Ag NPs can passivate the surface defects of ZnO and work as surface plasmons from the characterization of photoluminescence (PL), X-ray photoelectron spectroscopy (XPS), and finite difference time domain method (FDTD) simulation. The normalized detectivity (D^*) of the Ag NP-modified detector reaches to 1.45 × 10¹⁰ Jones at 0.715 mW incident light power, which is higher than that of 5.72 × 10⁹ Jones of the bare ZnO photodetector. The power-law relationship between the photocurrent and the incident light power of the Ag NP-modified ZnO detector is I_pc ∝ P^2.34, which means the photocurrent is highly sensitive to the change of incident light power.

Keywords: Ag nanoparticles; Inkjet printing; Passivation; Surface plasmons; ZnO photodetector.

Abstract

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