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Title:
 
TiO2/SiO2 Composite Light Scattering Back Reflector with Liquid Source Passivation
 
Author(s):
 
H. Nagayoshi, T. Murooka, C. Hagiwara
 
Keywords:
 
Passivation, SiO2, Back Reflector, Nanoparticle, Scattering
 
Topic:
 
WAFER-BASED SILICON SOLAR CELLS AND MATERIALS TECHNOLOGY
Subtopic: Silicon Solar Cell Improvements
Event: 31st European Photovoltaic Solar Energy Conference and Exhibition
Session: 2AV.2.29
 
Pages:
 
693 - 695
ISBN: 3-936338-39-6
Paper DOI: 10.4229/EUPVSEC20152015-2AV.2.29
 
Price:
 
 
0,00 EUR
 
Document(s): paper
 

Abstract/Summary:


In this study, we developed a scattering Back Reflector (BR) using TiO2 nanoparticles(NPs)/SiO2 composite. The SiO2 binder was made from Perhydropolysilazane (PHPS), which changes into pure SiO2 by heat treatment less than 450C. The composite BR showed more than 90% of absolute reflectance at near infrared region. A liquid source SiO2 passivation layer, which shows high passivation property in N-type wafers, was inserted between a substrate and the BR layer. Although heat treatment in BR deposit process degraded the effective lifetime, the composite BR using Al coated TiO2 NPs maintained high effective lifetime.