Self-Powered UV-B Photodetector Based on Hybrid Al:MgZnO/PEDOT:PSS Schottky Diode

Self-Powered UV-B Photodetector Based on Hybrid Al:MgZnO/PEDOT:PSS Schottky Diode
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基于混合 Al:MgZnO/PEDOT:PSS 肖特基二极管的自供电 UV-B 光电探测器

DOI:
10.1109/led.2016.2631551
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发表时间:
2017
影响因子:
4.9
通讯作者:
Yanqin Chen
Yanqin Chen
中科院分区:
工程技术2区
文献类型:
--
作者:
Qinghong Zheng;Jin Huang;Chuxia Han;Yanqin Chen

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在蓝宝石衬底上制备了 Mg 含量高达 47.5% 的宽带隙 Al 掺杂 MgZnO (AMZO) 薄膜。通过锌蒸气退火,AMZO 薄膜的电导率得到了极大的提高。通过引入聚(3, 4-乙烯二氧噻吩)聚(苯乙烯磺酸)(PEDOT:PSS)作为肖特基接触来制造垂直结构光电二极管。该光电二极管表现出对 UV-B 光的特性响应,在 278 nm 处的峰值响应率为 19.1 mA/W,在没有外部偏置的情况下,可见光抑制比超过两个数量级。高性能归因于 AMZO 薄膜的高导电性和使用 PEDOT:PSS 形成的良好肖特基接触。
Wide bandgap Al-doped MgZnO (AMZO) films with a Mg content up to 47.5% were prepared on sapphire substrates. Conductivities of the AMZO films were greatly improved through zinc vapor annealing. Vertical structure photodiodes were fabricated by introducing poly (3, 4-ethylenedioxythiophene) poly (styrenesulfonate) (PEDOT:PSS) as a Schottky contact. The photodiode showed characteristics response to the UV-B light, with a peak responsivity of 19.1 mA/W at 278 nm and a visible rejection ratio of over two orders without external bias. The high performance was attributed to the high conductivity of the AMZO film and good Schottky contact formed using PEDOT:PSS.
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