The comparison of the EQEmeas and EQEtheo indicates that1.7% loss is coming from the wavelength range of 300nm to 900 nm,while another 1.7% loss is from 900 to 1,200 nm. Since thepenetration depth of light in most of the short wavelength range(300900 nm) is shorter than the thickness of the Si wafer, almost all J SC loss in this wavelength range can be related to the front surface of the HJ-IBC cell.