The UNSW School of Photovoltaic and Renewable Energy Engineering has received a funding grant from ARENA to conduct a research and development project which address the performance and cost limitations of current PERC technology by transformation into PERL technology for industrial environments by incorporating multiple separately proven technologies.
Hydrogen passivation will be used to neutralise defects in the silicon material and laser doping and bifacial plating will be used for a low-cost implementation of a PERL structure.
The processes developed in this project have been transferred to an industrial partner and they have fabricated such cells using industrial equipment and reaching efficiencies of up to 23%.
Both types of cells have been light soaked to test for Light Induced Degradation (LID). Using an industry standard light soaking process, the cells lose less than 1% relative efficiency due to LID. A 21.3% bifacial module of bifacial plated PERC cells has also been made.
Future work will involve further optimisation of the industrial prototype tools to achieve desired and reliable plating metallization in not only Passivated Emitter, Rear Locally (PERL) diffused cell, but also other types of high efficiency solar cells (e.g. TOPCon, SHJ).
Hydrogenated Bifacial PERL Silicon PV Cells Public Dissemination Report
This final report explores the promising cell and module results achieved during this project, which are expected to instill confidence in using plating metallization to overcome limitation in screen-printing thereby achieving higher efficiency at a low cost.
Report: Hydrogenated Bifacial Perl Silicon PV Cells with Laser Doping and Plated Contacts
This report provides the outcomes of three ARENA projects to develop the next generation high efficiency solar cell, based on the three key technologies developed in these projects: laser doping, advanced hydrogenation, and simultaneous bifacial plating.
How the project works
The Hydrogenated Bifacial PERL Silicon PV Cells project is a key initiative of ARENA’s 2017 Investment Plan for accelerating solar PV innovation. The project will combine three separate technologies that were developed in previous ARENA projects. The study will integrate hydrogen passivation, laser doping and bifacial plating into the current PERC solar cell technology to overcome performance limitations and reduce cost.
One of the key outcomes for the project is to develop an industrial PERL technology to increase cell efficiencies to over 24%.
Area of innovation
The Hydrogenated Bifacial PERL Silicon PV Cells project will integrate three innovative technologies into the current PERC solar cell process to develop the next generation high-efficiency solar cell technology for commercial production. Laser doping will allow the formation of localised heavily doped regions for the PERL structure. Bifacial plating will reduce cost of metal deposition and enable the generation of current from both front and rear surfaces of the cell. The advanced hydrogenation technology will eliminate light induced degradation and improve stability of the solar cells.
The project will generate new knowledge on the development of high-efficiency p-type solar cells using innovative, high-throughput commercial production processes and equipment. This will increase the efficiency and reduce the cost of industrial p-type solar cells and generate new intellectual property.