Alternative Spectral Photoresponse in a p-Cu2ZnSnS4/n-GaN Heterojunction Photodiode by Modulating Applied Voltage

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• 作者：Gang Yang ; Yong-Feng Li ; Bin Yao ; Zhan-Hui Ding ; Rui Deng ; Xuan Fang ; Zhi-Peng Wei
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 5, 2015
• 年：2015
• 卷：7
• 期：30
• 页码：16653-16658
• 全文大小：328K
• ISSN：1944-8252

文摘

We report alternative visible and ultraviolet light response spectra in a p-Cu₂ZnSnS₄ (p-CZTS)/n-GaN heterojunction photodiode. A CZTS film was deposited on an n-GaN/sapphire substrate using a magnetron sputtering method. Current鈥搗oltage characteristic of the p-CZTS/n-GaN heterojunction photodiode showed a good rectifying behavior. The spectral response measurements indicate that the response wavelength of the photodiode can be tuned from ultraviolet to visible regions via applying zero and reverse bias. A band alignment at the interface of the p-CZTS/n-GaN heterojunction was proposed to interpret the spectral response of the device.