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New record efficiencies have been achieved on Cd-free Cu(In,Ga)(Se,S)2 thin-film photovoltaic submodules prepared by a two-step sulfurization after selenization process. Aperture area efficiencies of 19.2% and 19.8% were independently confirmed on a 30 cm × 30 cm submodule (841 cm2) and on a 7 cm × 5 cm minimodule (24.2 cm2), respectively. These achievements were brought about by transferring several...
World record efficiency of 22.3% Cu(In, Ga)(Se, S)2 (CIGS) thin film solar cell has been achieved in Solar Frontier K.K. and certified independently by Fraunhofer Institute für Solare Energiesysteme (ISE). The device parameters are as follows, JSC: 39.4 mA cm−2, VOC: 721.9 mV and FF: 0.782. Compared to our previous champion with 20.9% efficiency, a major improvement in VOC (+36.1 mV) was observed...
We have developed a Laser-Assisted Deposition (LAD) process for improving the crystalline quality of CIGS thin films and cell performance. The VOC, FF and conversion efficiency improved by the LAD process for all CIGS devices with different Ga content. In particular the Voc improved remarkably for low Ga-content CIGS devices. In fact a high efficiency low-Ga CIGS thin film solar cell was achieved...
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