NDLI: Novel front metal contact patterning scheme for C-SI solar cells

Content Provider	IEEE Xplore Digital Library
Author	Sastry, A.P. Chaudhary, V.A. Solanki, C.S.
Copyright Year	2010
Description	Author affiliation: Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India (Sastry, A.P.; Chaudhary, V.A.; Solanki, C.S.)
Abstract	An alternative metallization scheme for c-Si solar cells other than Ag screen printing, has gained importance in recent years. Metallization techniques such as two step electroplated contacts of Ni/Cu and Ni/Ag, have shown higher efficiencies in c-Si solar cells. One of the important processes in the electroplated contacts is opening of the dielectric layer (like SiN or SiO). In this paper a novel contact patterning scheme based on use of a thermally sensitive chemical etching paste Merck, IsishapeTM is presented. Commercially processed c-Si solar cells of area 4 × 4 $cm^{2}$ are used in the experiment. These solar cells are processed for texturization, p-n junction formation, antireflective coating (ARC) deposition and back surface field (BSF), but without front metal contacts. A thermally sensitive paste from Merck, $Isishape^{TM}$ is used for etching the ARC. A block of stainless steel is micro-machined in order to get extrusion of metal pattern similar to finger and bus bar for the front metal contact. Arrangements for electrical heating of the metal block are made. Using the electrical heaters the metal block can be heated up to 500°C. Using the proposed technique finger lines of width 250 µm are developed on the ARC coated textured c-Si wafers. The proposed patterning technique can be used in industrial environment with high throughput.
Starting Page	003491
Ending Page	003493
File Size	1852716
Page Count	3
File Format	PDF
ISBN	9781424458905
ISSN	01608371
e-ISBN	9781424458929
DOI	10.1109/PVSC.2010.5614733
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photovoltaic cells Fingers Etching Chemicals Metallization Solar heating chemical etching Front contact patterning solar cell
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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