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有机紫外光探测器(Organic Ultraviolet Photodetector,OUV-PD)因质量轻、柔性和成本低等优点已引起广泛关注。以m-MTDATA、NPB和Bphen分别为空穴注入层、给体和受体制备了OUV-PD。器件结构为:ITO/m-MTDATA/NPB/Bphen/LiF/Al,通过优化给受体层的厚度,实现了器件的最优性能。当NPB厚度为60nm、Bphen厚度为90nm时器件性能最佳,在光照强度为1.05mW/cm2、波长为365nm的紫外光照射下,最大响应度为131mA/W。同时,结合材料特点和器件结构讨论了工作机理。
Organic Ultraviolet Photodetector (OUV-PD) has drawn much attention due to its advantages of light weight, flexibility and low cost. OUV-PD was prepared with m-MTDATA, NPB and Bphen as hole injection layer, donor and acceptor respectively. The structure of the device is: ITO / m-MTDATA / NPB / Bphen / LiF / Al. Optimum device performance is achieved by optimizing the thickness of the acceptor layer. When the thickness of NPB is 60 nm and the Bphen thickness is 90 nm, the device performance is the best. Under the irradiation of ultraviolet light with wavelength of 365 nm and light intensity of 1.05 mW / cm2, the maximum responsivity is 131 mA / W. At the same time, the working mechanism is discussed in combination with the material characteristics and device structure.