Visible-blind and solar-blind ultraviolet photodiodes based on (InxGa1−x)2O3

Visible-blind and solar-blind ultraviolet photodiodes based on (InxGa1−x)2O3
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基于 (InxGa1âx)2O3 的可见光和日盲紫外光电二极管

DOI:
10.1063/1.4944860
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发表时间:
2016
影响因子:
4
通讯作者:
Z. Zhang
Z. Zhang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Z. Zhang

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在si掺杂(In{sub x}Ga{sub 1-x}){sub 2}O{sub 3}薄膜上实现了从可见盲到太阳盲的紫外和深紫外选择性光电二极管,薄膜单调横向变化为0.0035 < x < 0.83。在脉冲激光沉积中,采用连续成分扩散方法,依靠单个分段目标的烧蚀来沉积该层。在背面照明时,光响应信号由金属-半导体-金属结构提供。随着x的增加,吸收起始值从4.83 eV调整到3.22 eV。用样品中富铟部分制备的光电二极管观察到更高的响应率,可以确定其内部增益机制。
UV and deep-UV selective photodiodes from visible-blind to solar-blind were realized based on a Si-doped (In{sub x}Ga{sub 1–x}){sub 2}O{sub 3} thin film with a monotonic lateral variation of 0.0035 < x < 0.83. Such layer was deposited by employing a continuous composition spread approach relying on the ablation of a single segmented target in pulsed-laser deposition. The photo response signal is provided from a metal-semiconductor-metal structure upon backside illumination. The absorption onset was tuned from 4.83 to 3.22 eV for increasing x. Higher responsivities were observed for photodiodes fabricated from indium-rich part of the sample, for which an internal gain mechanism could be identified.
使用脉冲激光沉积和单个分段靶材进行连续成分扩散
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