THE USE OF SCREEN PRINTING IN SILICON SOLAR CELL FABRICATION
This project aims at the development of screen printing techniques for solar cell fabrication. Several thousand single crystal silicon cells have been made using the integral printing process. The printing process has also been implemented on available polycrystalline silicon substrates. This final report describes the printing process and the optimization of processing parameters for low cost materials. Important processing parameters for polycrystalline silicon substrates include initial surface etching, the role of glass frit in the silver ink, and antireflection coating. A new back surface field process has been developed yielding high open circuit voltages on single crystal substrates. Homemade silver and aluminium pastes have been developed which compare with standard commercially available pastes. Results are presented for large area cells on low cost materials and some efficiency limiting mechanisms are identified. Diffusion length measurements indicate significant nonlinearities as a function of white light bias. Some demonstration panels made from advanced CZ materials have efficiencies of 10%. Finally, an IPEG economic analysis of the screen printing process has been made.
Bibliographic Reference: EUR 9821 EN (1985) MF, 88 P., BFR 150, BLOW-UP COPY BFR 440, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989124016500 / Last updated on: 1987-01-01
Available languages: en