Options
2018
Conference Paper
Titel
Applicability of photonic sintering and autoclaving as alternative contact formation methods for silicon solar cells with passivating contacts
Abstract
Photonic sintering, both with ultraviolet and near-infrared radiation, as well as thermal sintering with pressurization (autoclaving) is compared to a typical thermal curing of metal grids printed on heterojunction solar cells. For the metallization with screen printing, besides a polymer-based silver paste designed for photovoltaics, two commercially available pastes developed for the printed electronics industry have been chosen. One is optimized for autoclaving and the other for photonic sintering. With ultraviolet photonic sintering using a non-optimized process, lateral resistivities of the screen-printed contact fingers rl of 7.6 µOcm and contact resistivities at the metal/TCO interface rc of 6.0-9.1 mOcm2; are achieved. This is comparable to results reached with conventional thermal curing. Thereby, the main advantage of photonic sintering is the potential of significantly reducing the sintering time tsintering from 30 min to milliseconds. With autoclaving and near-infrared photonic sintering, lateral resistivities of 10.9 and 11.9 µOcm are achieved, respectively.