Enhancing Light-Trapping Properties of Amorphous Si Thin-Film Solar Cells Containing High-Reflective Silver Conductors Fabricated Using a Nonvacuum ProcessReportar como inadecuado




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International Journal of PhotoenergyVolume 2014 2014, Article ID 627127, 5 pages

Research Article

Photovoltaic Technology Division, Green Energy and Environment Research Laboratories, Industrial Technology Research Institute ITRI, Hsinchu 31040, Taiwan

Department of Electrical Engineering, National Chung Hsing University, Taichung 40227, Taiwan

Micro-Nano Manufacturing Technology Department, Mechanical and Systems Research Laboratories, Industrial Technology Research Institute ITRI, Hsinchu 31040, Taiwan

Received 16 December 2013; Revised 7 February 2014; Accepted 11 February 2014; Published 16 March 2014

Academic Editor: Mahmoud M. El-Nahass

Copyright © 2014 Jun-Chin Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We proposed a low-cost and highly reflective liquid organic sheet silver conductor using back contact reflectors in amorphous silicon a-Si single junction superstrate configuration thin-film solar cells produced using a nonvacuum screen printing process. A comparison of silver conductor samples with vacuum-system-sputtered silver samples indicated that the short-circuit current density Jsc of sheet silver conductor cells was higher than 1.25 mA-cm

. Using external quantum efficiency measurements, the sheet silver conductor using back contact reflectors in cells was observed to effectively enhance the light-trapping ability in a long wavelength region between 600 nm and 800 nm. Consequently, we achieved an optimal initial active area efficiency and module conversion efficiency of 9.02% and 6.55%, respectively, for the a-Si solar cells. The results indicated that the highly reflective sheet silver conductor back contact reflector layer prepared using a nonvacuum process is a suitable candidate for high-performance a-Si thin-film solar cells.





Autor: Jun-Chin Liu, Chen-Cheng Lin, Yu-Hung Chen, Chien-Liang Wu, Chia-Ming Fan, Yu-Ming Wang, and Chung-Yuan Kung

Fuente: https://www.hindawi.com/



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