Photoelectric conversion characteristics of ZnO/SiC/Si heterojunctions

【摘要】 <正>A series of n-ZnO/n-SiC/p-Si and n-ZnO/p-Si heterojunctions were prepared by DC sputtering.Their structural properties,Ⅰ-Ⅴcurves,photovoltaic effects and photo-response spectra were studied.The photoelectric conversion characteristics of n-ZnO/n-SiC/p-Si and n-ZnO/p-Si heterojunctions were investigated.It is found that the photoelectric conversion efficiency of the n-ZnO/n-SiC/p-Si heterojunction is about four times higher than that of the n-ZnO/p-Si heterojunction.The photovoltaic response spectrum indicated that the photoresponse curve of n-ZnO/nSiC /p-Si increased more strongly than that of n-ZnO/p-Si with the wavelength increasing.It shows that the photoresponse of n-ZnO/p-Si can be enhanced when inserting a 3C-SiC layer between ZnO and Si.There is one inflexion in the photocurrent response curve of the n-ZnO/p-Si heterojunction and two inflexions in that of the n-ZnO/n-SiC/p-Si heterojunction. It is clear that the 3C-SiC plays an important role in the photoelectric conversion of the n-ZnO/n-SiC/p-Si heterojunction.更多还原

【Abstract】 A series of n-ZnO/n-SiC/p-Si and n-ZnO/p-Si heterojunctions were prepared by DC sputtering.Their structural properties,Ⅰ-Ⅴcurves,photovoltaic effects and photo-response spectra were studied.The photoelectric conversion characteristics of n-ZnO/n-SiC/p-Si and n-ZnO/p-Si heterojunctions were investigated.It is found that the photoelectric conversion efficiency of the n-ZnO/n-SiC/p-Si heterojunction is about four times higher than that of the n-ZnO/p-Si heterojunction.The photovoltaic response spectrum indicated that the photoresponse curve of n-ZnO/nSiC /p-Si increased more strongly than that of n-ZnO/p-Si with the wavelength increasing.It shows that the photoresponse of n-ZnO/p-Si can be enhanced when inserting a 3C-SiC layer between ZnO and Si.There is one inflexion in the photocurrent response curve of the n-ZnO/p-Si heterojunction and two inflexions in that of the n-ZnO/n-SiC/p-Si heterojunction. It is clear that the 3C-SiC plays an important role in the photoelectric conversion of the n-ZnO/n-SiC/p-Si heterojunction.更多还原