Title :
Efficiency enhancement of thin-film a-Si:H solar cell with periodic anti-ring back reflector
Author :
Hui-Hsin Hsiao ; Po-Yuan Chen ; I-Chun Cheng ; Hung-Chun Chang ; Yuh-Renn Wu
Author_Institution :
Grad. Inst. of Photonics & Optoelectron., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
The optical and electrical properties of a new type photonic-plasmonic nanostructure on the back contact of solar cells were investigated numerically through the three-dimensional (3D) finite-difference time-domain (FDTD) method and the poisson and drift-diffusion (DDCC) solver. The focusing effect and the Fabry-Perot resonances are identified as the main mechanisms for the enhancement of the optical generation rate as well as the short circuit current density. In addition, the surface topography of the nanopattern has a strong effect on the device physics such as the potential and recombination profiles, and therefore influencing the electrode collecting efficiency of the photocurrents.
Keywords :
Fabry-Perot resonators; electrochemical electrodes; finite difference time-domain analysis; nanotechnology; photoemission; plasmonics; short-circuit currents; solar cells; thin film devices; 3D FDTD method; 3D finite-difference time-domain method; DDCC solver; Fabry-Perot resonances; Poisson solver; back contact; drift-diffusion solver; efficiency enhancement; electrical properties; focusing effect; nanopattern surface topography; optical generation rate enhancement; optical properties; periodic anti ring back reflector; photocurrent electrode collecting efficiency; photonic-plasmonic nanostructure; short circuit current density; thin-film solar cells; Glass; Optical device fabrication; Spontaneous emission; light trapping; solar cell;
Conference_Titel :
Photovoltaic Specialist Conference (PVSC), 2014 IEEE 40th
Conference_Location :
Denver, CO
DOI :
10.1109/PVSC.2014.6925587
