Screen printed emitters prepared by fast diffusion in converyor belt furnace

Abstract EN

This paper shows that screen printed dopant with rapidly formed emitters in less than 5 min in the hot zone of a conveyor belt furnace can produce selective emitter.

Screen printing of dopant pontes is a good method to realize the highly doped regions for the contact areas.

We have tested the feasibility of the selective diffusion formation by comparing, homogeneous diffusion of an heavily doped emitter followed by a chemical etch and doping source deposition (by screen printing) followed by an anneal in a belt furnace.

In this paper, the properties of the highly and lowly doped emitters-processed in a conventional bell furnace- are investigated by means of resistivity measurements, stripping hall profiles analysis, electrical current-voltage and spectral response measurements.

Pholovohaic results show an improvement in short circuit current density by more than 23% in comparison with the reference cell (homogeneous emitter) and a conversion efficiency of 11'.

6% has been achieved.