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指導老師 : 林克默 博士
黃文勇 博士
學
生 : 郭怡彣
日
期 : 2011. 04. 25
2011/4/25
STUT 太陽能材料與模組實驗室
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Outline
1.
2.
3.
4.
Introduction
Experimental
Results and discussion
Conclusions
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1.Introduction
• The steady growth of thick film technology has been due
to the continual flow of new microelectronic circuit needs
and the ability to develop materials to accommodate them.
• Amongst the various thick film conductors, silver has
established as a high reliability option since it has
enormous economic advantage compared to
gold/platinum conductors.
• This paper reports the microstructural, physico-chemical
and electrical properties of the fritted silver thick film
electrode paste formulated using different powder
processing conditions, which also included treatment with
surfactants.
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2. Experimental
Preparation of silver thick films
• For preparation of the pastes, the lead borosilicate glass
frit and organic vehicle were mixed with different silver
powders having ratio ranging from 76.8/3.2/20 to
72/8/20 of silver/glass frit/vehicle.
• Two types of silver pastes were formulated: (1) powder
processed without any surfactants, batch O and (2) powder
processed with surfactants,
batch A, respectively.
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2. Experimental
Physico-chemical and electrical characterization of the
sample silver films
• The thixotropic rheology of the silver paste gets
improved in case of the samples (batch A) formulated
with surfactant treated silver powders resulting into
smooth, viscous nature and good surface tension of the
paste which ultimately leads to a sharp edged film
structure.
• On the other hand the thick film pastes of samples
(batch O) have both less viscosity and surface tension
that leads to spreading of the film after screen-printing.
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3.Results
X-ray diffraction and EDAX analysis
• The (1 1 1), (2 0 0), (2 2 0) and (3 1 1) planes are
dominant.
• The observed ‘d’ values of silver are in good agreement
with the standard ‘d’ values obtained from the ASTM
diffraction data file.
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3.Results
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SEM studies
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• From the table, it is observed that the bulk resistivity
increases with an increase in glass percentage as
expected.
• The peel strength of the samples also increases with an
increase in the glass content.
• The samples containing 8 and 10% glass exhibit greater
peel strength than those containing 4 and 6% glass.
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• From this table, it is seen that the paste containing low
glass contents shows high short circuit current (Isc) as
well as high current (Imax).
• The current decreases with increasing the glass content
except for the sample SP406A. It can be concluded that
the electrical performance of cell deteriorates with an
increase in glass content in the paste.
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4.Conclusions
•銀沉澱法可以提供亞微米大小的銀顆粒，並
提供低成本，高產量，因為銀能減少反應時
間。
•因為太陽能電池的性能方面被關注，故在太
陽能電池方面厚膜與少量玻璃量能產生最佳
效果。
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Thank you for your attention
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