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We report InGaN/GaN multi-quantum well (MQW) solar cells with a comparatively high open-circuit voltage and good concentration properties.Thc open circuit voltage (Voc) keeps increasing logarithmically with concentration ratio until 60suns.The peak Voc of InGaN/GaN MQW solar cells,which has a predominant peak wavelength of 456nm from electroluminescence measurements,is found to be 2.45 V when the concentration ratio reaches 333×.Furthermore,the dcpendence of conversion efficiency and fill factor on concentration ratio are analyzed.