Cost-effective LBIC system for solar cell characterization

Author

Jeric C. Lim;Paul Anthony C. Lorenzo;Erees Queen B. Macabebe

Author_Institution

Department of Electronics, Computer, and Communications Engineering, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, Quezon City 1108 Philippines

fYear

2015

Firstpage

1

Lastpage

4

Abstract

Defects in solar cells such as localized shunts greatly reduce the efficiency of the device by diverting current away from the output. Laser beam induced current (LBIC) technique is a non-destructive characterization tool to identify the spatial distribution of defects by measuring the generated current of the cells. This technique determines the defects by scanning a laser beam onto the cell while measuring the generated current as a function of position. This contribution presents the development of a cost-effective LBIC system using three wavelengths: 650 nm, 532 nm, and 450nm. LBIC resolution is optimized by varying the spot size of the light source and the step size of the machine. LBIC maps generated from different laser wavelengths show variations in image quality and details.

Keywords

"Photovoltaic cells","Light sources","Photonics","Imaging","Laser beams","Measurement by laser beam","Current measurement"

Publisher

ieee

Conference_Titel

TENCON 2015 - 2015 IEEE Region 10 Conference

ISSN

2159-3442

Print_ISBN

978-1-4799-8639-2

Electronic_ISBN

2159-3450

Type

conf

DOI

10.1109/TENCON.2015.7372754

Filename

7372754