In2O3:Ni/Ga2O3 Heterojunction Thin-Film Transistors for UV-C Photodetection
In2O3:Ni/Ga2O3 Heterojunction Thin-Film Transistors for UV-C Photodetection
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用于 UV-C 光电检测的 In2O3:Ni/Ga2O3 异质结薄膜晶体管
DOI:
10.1109/led.2023.3238350
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发表时间:
2023-03
影响因子:
4.9
通讯作者:
Yichun Liu
中科院分区:
文献类型:
--
作者:
Peng Li;Jiangang Ma;Huifang Wang;Weizhen Liu;Zhongshi Ju;Bingsheng Li;Haiyang Xu;Yichun Liu
Wide bandgap metal oxide semiconductors (MOS), such as In2O3 and Ga2O3, are multifunctional materials that can be used as electron transport and photosensitive layers in various optoelectronic devices. However, either the excessive free electrons or low carrier mobility caused by intrinsic defects of MOSs restrict the performance of these devices. The current work demonstrates that acceptor doping and interface energy band engineering can be used to achieve a high-performance MOS thin-film transistor (TFT) that is suitable for UV-C photodetection. The Ni doping concentration in the In2O3 layer and the thickness of the Ga2O3 layer are optimized to control the performance of the In2O3:Ni/Ga2O3 heterojunction TFTs. As a result, a threshold voltage of 0.34 V, linear mobility of 47 cm2/Vs, on/off current ratio over <inline-formula> <tex-math notation="LaTeX">$10^{{7}}$ </tex-math></inline-formula>, and small threshold voltage shift under gate bias stress are obtained, owing to the electron accumulation at the In2O3:Ni/Ga2O3 interface in response to the energy band alignment. Under UV-C illumination, the In2O3:Ni/Ga2O3 heterojunction TFT shows a large responsivity of 879 A/W, an UV-C/visible light rejection ratio (<inline-formula> <tex-math notation="LaTeX">$\text{R}_{{254} \text {nm}}/\text{R}_{{400} \text {nm}}$ </tex-math></inline-formula>) of <inline-formula> <tex-math notation="LaTeX">$9.5\times 10^{{3}}$ </tex-math></inline-formula>, and a detectivity of <inline-formula> <tex-math notation="LaTeX">$4\times 10^{{16}}$ </tex-math></inline-formula> Jones.
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影响因子:
4
作者:
Zuyin Han;Shuang Song;Huili Liang;Hang Shao;Sigui Hu;Yan Wang;Jiwei Wang;Zengxia Mei
通讯作者:
Zengxia Mei
影响因子:
29.4
作者:
Hyukjoon Yoo;I. S. Lee;Sujin Jung;S. Rho;B. Kang;Hyun Jae Kim
通讯作者:
Hyukjoon Yoo;I. S. Lee;Sujin Jung;S. Rho;B. Kang;Hyun Jae Kim
影响因子:
64.8
作者:
Nomura, K;Ohta, H;Hosono, H
通讯作者:
Hosono, H
影响因子:
3.1
作者:
Kim, Youn Goo;Kim, Taehun;Jang, Jin
通讯作者:
Jang, Jin
影响因子:
2.9
作者:
Jiazhen Sheng;Jung Hoon Lee;Wan-Ho Choi;Taehyun Hong;Minjung Kim;Jin-seong Park
通讯作者:
Jiazhen Sheng;Jung Hoon Lee;Wan-Ho Choi;Taehyun Hong;Minjung Kim;Jin-seong Park