Open AccessAg@SiO<sub>2</sub> coupled structure’s design and regulation and control of response to thin film solar cells
Author(s) -
Bu-Qing Gong,
Xiaoyu Chen,
Weipeng Wang,
Zhiye Wang,
Hua Zhou,
Xiangqian Shen
Publication year - 2020
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.69.20200334
Subject(s) - materials science , solar cell , finite difference time domain method , optoelectronics , energy conversion efficiency , absorption (acoustics) , photoelectric effect , optics , amorphous solid , dielectric , solar cell efficiency , diffraction , physics , crystallography , chemistry , composite material
The coupled nano-structure Ag@SiO 2 has both plasmon excitation like metallic nanoparticles and diffraction scattering like a dielectric nanosphere, which effectively controls the propagation path and the energy distribution of incident light and shows great potential applications in light trapping for thin film solar cells. In this work, we construct a three-dimensional electromagnetic model based on the finite-difference time-domain (FDTD) and rigorous coupled-wave analysis (RCWA) method to investigate the regulation mechanism of Ag@SiO 2 coupling structure to the spectral response of amorphous silicon cells. By being optimally designed, a high-efficiency cell device is achieved. The results show that the transmitted light into the active layer reaches a maximum value when Ag and SiO 2 have their feature sizes of 18 and 150 nm, respectively. The absorption spectrum of the corresponding cell device also arrives at its maximum value. The photoelectric conversion efficiency is enhanced from 7.19% to 7.80%, with an increment of 8.48% compared with the flat solar cell with an equivalent thickness of absorbing layer.