Title
Light trapping in polycrystalline silicon thin-film solar cells based on liquid phase crystallization on textured substrates
Date Issued
01 January 2013
Access level
metadata only access
Resource Type
conference paper
Author(s)
Institute for Silicon-Photovoltaics
Publisher(s)
Institute of Electrical and Electronics Engineers Inc.
Abstract
Liquid phase crystallization (LPC) is a promising technique to fabricate high-quality polycrystalline silicon absorber layers on cheap glass substrates. Recently, we achieved open-circuit voltages above 580mV using a silicon heterojunction and a newly developed single-sided contact system. However, the still moderate efficiency of 5.7% can be attributed to short circuit current densities not exceeding 16mA/cm2, caused by optical losses and absorber recombination. An approach to tackle the first problem is presented in this work. In general, a proper light management concept for thin film devices involve specially designed anti reflective coatings (ARC) and textured surfaces on both sides of the device, to enhance the optical path of the cell. As the crystals achieved using LPC are up to cm in length, commonly used wet chemical treatments using in wafer-based PV are applicable here, too. However providing a texture to the substrate:silicon interface is more complex as the texture as well as all layers deposited before the crystallization process must withstand the high temperatures present during LPC. However it is possible to deposit adequate inter-layers that enable LPC on randomly textured substrates as shown in this work. © 2013 IEEE.
Start page
1326
End page
1329
Language
English
OCDE Knowledge area
Física atómica, molecular y química
Ingeniería eléctrica, Ingeniería electrónica
Ingeniería de materiales
Subjects
Scopus EID
2-s2.0-84896459337
ISSN of the container
01608371
ISBN of the container
978-147993299-3
Conference
Conference Record of the IEEE Photovoltaic Specialists Conference
Sources of information:
Directorio de Producción Científica
Scopus