Photovoltaic and Physical Characteristics of Screen-Printed Monocrystalline Silicon Solar Cells with Laser Doping and Electroplated Copper

Abstract

Photovoltaic and physical characteristics of screen-printed monocrystalline silicon solar cells (SPMSCs) were presented with electroplated copper (EPC) as the rear contact. The boron back surface field (B-BSF) formed by spin-on doping and laser doping (LD) was prepared as a seed layer for the EPC. The LD parameters, including the laser focus, laser power, laser speed, and laser line pitch, were investigated. Moreover, the effects of KOH etching on the surface properties after the LD process were explored. Furthermore, to enhance the adhesion between the B-BSF seed layer and EPC contact layer, a laser pinhole process was proposed. Finally, the EPC processes with various electroplating times were addressed. The results revealed that the mechanism of enhancements could be attributed to a continuous B-BSF seed layer and a reduction of series resistance, as well as an increase of open-circuit voltage and adhesion between the B-BSF seed layer and EPC contact layer.

Electrical investigation of ITO films in Al-doped crystalline silicon solar cells

“…Even though, conventional, high temperature processes have been applied to form Al BSF in this paper, same results can be achieved using room temperature pulsed laser processing [21]. Lasers are attractive due to their spectral, temporal, and spatial characteristics and have been extensively used for many solar cells processing applications including diffusion [22,23].…”

Determination of Technological Features of a Solar Photovoltaic Cell Made of Monocrystalline Silicon P+PNN+

“…In general, the efficiency of photovoltaic energy conversion is very limited of physical causes [9]. Approximately 24% of the solar radiation has a wavelength so large that it cannot be absorbed.…”