Effect of series resistance on metal-wrap-through multi-crystalline silicon solar cells

Metal-wrap-through (MWT) is a promising technique to improve the solar cell performance cost effectively because it can be easily integrated into the current production line with only two additional processing steps. Metal filling through the via-holes is a key to obtain low series resistances and g...

Full description

Saved in:
Bibliographic Details
Published in:Solar energy materials and solar cells 2011, Vol.95 (1), p.53-55
Main Authors: Jang, Dae Hee, Ko, Ji Hoon, Kang, Ju Wan, Kim, Jong Hwan, Jeong, Ji-Weon
Format: Article
Language:English
Subjects:
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Energy
Exact sciences and technology
Metal-wrap-through
Natural energy
Optimization
Photoelectric conversion
Photovoltaic cells
Photovoltaic conversion
Printing
Production lines
Screen printing
Series resistance
Silicon
Silicon solar cells
Solar cells
Solar cells. Photoelectrochemical cells
Solar energy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Metal-wrap-through (MWT) is a promising technique to improve the solar cell performance cost effectively because it can be easily integrated into the current production line with only two additional processing steps. Metal filling through the via-holes is a key to obtain low series resistances and good FFs. In this study, several screen printing process conditions were examined to find out an optimal filling state of the metal contacts. Various shapes of the filled metals in the via-holes were formed with different printing conditions, and the shape of the filled metal results in different series resistance values. Optimization of the printing conditions dramatically reduced the series resistance of the MWT cells. The maximum and minimum series resistance values of the cells obtained are 8.56 and 0.114 Ω cm 2, respectively. As a result, we achieved an efficiency of 16.3% using the optimal printing condition on 156 mm×156 mm solar-grade multi-crystalline silicon wafer, which was 0.8% absolute higher than the baseline cell efficiency.
ISSN:0927-0248
1879-3398
DOI:10.1016/j.solmat.2010.04.053