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2016 ; 9
(7
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Low Cost Local Contact Opening by Using Polystyrene Spheres Spin-Coating Method
for PERC Solar Cells
#MMPMID28773674
Hsu CH
; Yang CH
; Wang YH
; Huang CW
; Lien SY
; Kung CY
; Lou JC
Materials (Basel)
2016[Jul]; 9
(7
): ä PMID28773674
show ga
The passivated emitter and rear cell (PERC) concept is one of the most promising
technologies for increasing crystalline silicon solar cell efficiency. Instead of
using the traditional laser ablation process, this paper demonstrates spin-coated
polystyrene spheres (PS) to create local openings on the rear side of PERCs.
Effects of PS concentration and post-annealing temperature on PERC performance
are investigated. The experimental results show that the PS are randomly
distributed on wafers and no PS are joined together at a spin rate of 2000 rpm.
The PS can be removed at a temperature of 350 °C, leaving holes on the
passivation layers without damaging the wafer surfaces. As compared to the laser
opening technique with the same contact fraction, the PS opening technique can
yield a higher minority effective lifetime, a higher implied open-circuit
voltage, and a slightly higher short-circuit current. Although the fill factor of
the PS opening technique is lower owing to non-optimized distribution of the
openings, the conversion efficiency of the devices is comparable to that of
devices prepared via the laser opening process.