Faster solar growth in China will be spurred by a likely increase in long-term government targets United Photovoltaics is seeking HK$500m ($64.5m) in compensation from Hareon Solar Technology on claims it breached the conditions of a 930MW solar investment deal.
Dong J.,Hareon Solar Technology |
Tao L.,Hareon Solar Technology Co. |
Tao L.,Suzhou Runergy PV Technology Co. |
Zhu Y.,Hareon Solar Technology |
And 5 more authors.
IEEE Journal of Photovoltaics | Year: 2014
Full-size (156 x 156 mm 2) interdigitated back contact (IBC) solar cells have been developed with conventional industry processes. With PC1D simulation and short-flow experiment verification, we found that the tunnel junction shunting of rear n+/p + could be mitigated significantly by controlling the boron surface concentration; therefore, it is not necessary to form a gap between rear emitter and back surface field. Made by a novel yet relative simple process, the IBC cells preliminarily achieved 19.65% best efficiency with Jsc and V\rm oc as high as 40.5 mA/cm2 and 655 mV, respectively, while FF was only 73.9% due to the low pseudo fill factor (Pff) and high series resistance. Through the optimization of the rear pattern process, Pff was improved up to 82.5% and FF up to 77%. With further optimization of emitter, front surface field, passivation, and rear pattern design, the cells potentially can achieve up to 22.0% efficiency in the near future. © 2011-2012 IEEE.