High sensitive position-dependent photodetection observed in Cu-covered Si nanopyramids. (22nd March 2018)

• Record Type: Journal Article
• Authors: Mei, Chunlian; Zou, Jiaren; Huang, Xu; Zou, Bugao; Zhou, Peiqi; Gan, Zhikai; Hu, Jieqiong; Zhang, Qian; Wang, Hui
• Is Part Of: Nanotechnology. Volume 29:Number 20(2018)
• Publication Date: 2018-03-22
• Subjects: silicon nanopyramid -- copper nanoparticle -- light trapping -- lateral photovoltaic effect -- photodetection; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aab3f9
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Silicon nanopyramids with the excellent ability of light absorption have been mostly reported in solar cells. Here, we report an obviously enhanced lateral photovoltaic effect (LPE) in copper-nanoparticle-covered random Si nanopyramids (Cu@Si-pyramid). Remarkable photoelectric responses are achieved in broadband from 405 to 780 nm. Furthermore, a prominent LPE is double-enhanced from 74.0 to 157.9 mV mm −1 when the linear region decreases from 3 to 1 mm. Finite-difference time-domain simulation is applied to investigate the origin of the exceptional results. This work declares a position-sensitive property of Si-nanopyramid systems and proposes promising applications to photodetections based on LPE.