Fine front side metallisation by stretching the dispensed silver paste filament with graphite nanofibres

摘要: Abstract The miniaturization of finger electrodes is an area active research in the crystalline silicon solar cell industry, and diverse trials have been conducted with various printing techniques, including stencil, laser, aerosol jet, inkjet, electrohydrodynamic dispensing printing. Among these regarded as promising due to its superior capability construct fine a high aspect ratio homogeneity by single-pass without direct contact wafer. However, requirements small nozzle, short stand-off distance between nozzle cell, specially formulated highly viscous silver paste yield stress raise issues clogging, breakage colliding challenges developing printer that can accommodate pneumatic pressures. In this study, robust resolution aforementioned proposed using graphite nanofibres. addition nanofibres conventional greatly enhances elongational property paste. By stretching filament enhanced property, diameter reduced width 47.7 µm was achieved, which finer 21.4 µm than achieved Moreover, stable construction enabled at far 1 mm speed fast 100 mm/s. resulting efficiency higher +0.22%p (average) +0.30%p (median) those obtained