Share Email Print

Proceedings Paper

Efficiency improvement in nanorod amorphous silicon thin film with ultrathin metal electrode for photovoltaic application
Author(s): Chun-Chieh Chin; Ya-Han Ye; Ding-Wei Huang
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

In recent years, photovoltaic cells have attracted much attention and extensively been studied by many groups. The amorphous silicon (a-Si) thin film solar cells have the advantages of lower cost, less material consumption and potential for the building-integrated applications although the conversion efficiency is usually below 10%. In this paper, we show an a-Si thin film solar cell with periodical nanorod structures for light trapping enhancement and an ultrathin silver film as transparent electrode with a lower resistance for performance improvement. In such a design, the conversion efficiency can be greatly improved. The periodicity and duty ratio of the nanorods were optimized to enhance the diffraction of the light within 500-900 nm into guided modes in the a-Si thin film and thus the total optical absorption can be enhanced. Furthermore, a 5-nm ultrathin metal film was used as a transparent electrode to replace the conventional transparent conductive oxide while having a lower sheet resistance of 9.6 Ω/ and a transmittance from 90% to 70% within the spectral range from 300 nm to 900 nm. Our design was analyzed by using the full-wave finiteelement method to calculate the optical absorption of the incident sunlight in the a-Si thin film. According to the simulation results, the light absorption can be relatively enhanced by 69.6% and the total conversion efficiency can be relatively improved by 41.6% compared to the conventional thin film a-Si solar cell without nanorod structures.

Paper Details

Date Published: 5 November 2010
PDF: 6 pages
Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 78480E (5 November 2010); doi: 10.1117/12.870508
Show Author Affiliations
Chun-Chieh Chin, National Taiwan Univ. (Taiwan)
Ya-Han Ye, National Taiwan Univ. (Taiwan)
Ding-Wei Huang, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 7848:
Holography, Diffractive Optics, and Applications IV
Yunlong Sheng; Chongxiu Yu; Linsen Chen, Editor(s)

© SPIE. Terms of Use
Back to Top