Contact optimization on cristalline silicon solar cells

View/ Open
Date
2017Author
Advisor
Version
Acceso abierto / Sarbide irekia
Type
Trabajo Fin de Grado/Gradu Amaierako Lana
Impact
|
nodoi-noplumx
|
Abstract
The present Final Degree Project has been developed in CENER (National Renewable
Energy Centre), in particular in the Photovoltaic Solar Energy department.
Nowadays, photovoltaic technologies’ main challenge is to increase solar cells’
efficiency while reducing cost. In crystalline silicon, standard Al-BSF (Aluminium Back
Surface Field) structure does not constitute an optimal architecture in ...
[++]
The present Final Degree Project has been developed in CENER (National Renewable
Energy Centre), in particular in the Photovoltaic Solar Energy department.
Nowadays, photovoltaic technologies’ main challenge is to increase solar cells’
efficiency while reducing cost. In crystalline silicon, standard Al-BSF (Aluminium Back
Surface Field) structure does not constitute an optimal architecture in terms of efficiency.
In order to achieve higher conversion efficiency, PERC (Passivated Emitter and Rear
Contact) architecture has been developed and started to be used in the industry. It is
expected to reach in the following years values of efficiency of up to 23.5 %, never
attainable with the standard Al-BSF structure, with which the highest efficiency reached is
around 20 %.
During the Project, firstly solar cells are processed according to Al-BSF structure and
characterized to fix a baseline process. Once this finished, the main focus is to process
solar cells with the new PERC architecture. Different experiments varying rear solar cell
contact - in particular laser parameters to perform localized contacts and their design -
are carried out and characterized in order to find the optimal parameters of this process [--]
Subject
Photovoltaic energy,
Solar cell,
Metallic contact,
Al-BSF structure,
PERC,
Efficiency,
Recombination
Degree
Graduado o Graduada en Ingeniería en Tecnologías Industriales por la Universidad Pública de Navarra /
Industria Teknologietako Ingeniaritzan Graduatua Nafarroako Unibertsitate Publikoan