login

Search documents

Browse topics

Document details

 
Title:
 
Correlation between Conductivity and pH Measurements for KOH Texturing Solutions and Additives
 
Author(s):
 
I. Kashkoush, J. Rieker, G. Chen, D. Nemeth
 
Keywords:
 
Conductivity, PH, Solar Cells, texturization, Silicate, IPA-free
 
Topic:
 
WAFER-BASED SILICON SOLAR CELLS AND MATERIALS TECHNOLOGY
Subtopic: Manufacturing Issues and Processing
Event: 29th European Photovoltaic Solar Energy Conference and Exhibition
Session: 2BO.1.4
 
Pages:
 
397 - 400
ISBN: 3-936338-34-5
Paper DOI: 10.4229/EUPVSEC20142014-2BO.1.4
 
Price:
 
 
0,00 EUR
 
Document(s): paper
 

Abstract/Summary:


The ability to control the chemical concentration of etching baths is a critical step in being able to achieve uniform and repeatable texturization of solar cells. It also maximizes the chemical usage by being able to extend the usable bath life of the process. This in turn, cuts down on waste and reduces the overall cost of ownership (COO). The use of conductivity as a means of control has long been in use for oxide etching baths. The ability to extend that technology to other chemicals has been explored. This paper demonstrates the use of pH and conductivity sensors to monitor and control the concentration of KOH solutions. The effects of various additives as well as silicate buildup on pH and conductivity have been investigated and the results showed that the bath life can be extended and stable processes obtained.