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Study of organic visible-blind photodetector based on Alq3:NPD blend for application in near-ultraviolet detection
Optical Materials ( IF 3.9 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.optmat.2020.110490 Hanan Alzahrani , Khaulah Sulaiman , Alaa Y. Mahmoud , Rabab R. Bahabry
Optical Materials ( IF 3.9 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.optmat.2020.110490 Hanan Alzahrani , Khaulah Sulaiman , Alaa Y. Mahmoud , Rabab R. Bahabry
Abstract In this paper, we present a visible-blind organic photodetector with high sensitivity to the UV rays. The active layer is a bulk heterojunction of a binary blend of tris(8-hydroxyquinoline) aluminum (Alq3) as an acceptor material along with N, N′-Di [(1-naphthyl)-N, N′- diphenyl]-(1, 1′-biphenyl)-4, 4′-diamine (NPD) as a donor material. The device was fabricated using simple solution processing method with structure of ITO/PEDOT:PSS/Alq3:NPD/LiF/Al. The optical characteristics of the crystalline film is completely transparent at visible wavelengths and absorbs light at UV frequencies. Moreover, it exhibits emission quenching of photoluminescence intensity when more Alq3 added i.e. 2, 3 and 4 with respect to the host. In the electrical characterization, the optimized device (2:1 blend ratio) exhibits high sensitivity of 25,300 at −2 applied bias and under illumination of 40 mW/cm2 UV light. Response and recovery times of the UV sensor was found to be 0.69 s and 0.36 s, respectively. The result indicates that the blend of Alq3/NPD with its high photosensitivity and fast response to the UV light of 365 nm wavelength can be employed in the fabrication of a cost-effective and highly sensitive UV photodetector.
中文翻译:
基于Alq3:NPD混合物的有机可见盲光电探测器在近紫外探测中的应用研究
摘要 在本文中,我们提出了一种对紫外线具有高灵敏度的可见盲有机光电探测器。活性层是作为受体材料的三(8-羟基喹啉)铝(Alq3)与 N, N'-Di [(1-萘基)-N, N'-二苯基]-( 1, 1'-联苯)-4, 4'-二胺(NPD)作为供体材料。该器件采用简单的溶液处理方法制造,结构为 ITO/PEDOT:PSS/Alq3:NPD/LiF/Al。晶体薄膜的光学特性在可见光波长下是完全透明的,并在紫外线频率下吸收光。此外,当添加更多的Alq3,即相对于主体的2、3和4时,它表现出光致发光强度的发射猝灭。在电气特性方面,优化的器件(2:1 混合比)表现出 25 的高灵敏度,300 在 -2 施加偏压和 40 mW/cm2 紫外光照射下。发现紫外线传感器的响应时间和恢复时间分别为 0.69 秒和 0.36 秒。结果表明,Alq3/NPD 的混合物具有高光敏性和对 365 nm 波长紫外光的快速响应,可用于制造具有成本效益和高灵敏度的紫外光电探测器。
更新日期:2020-12-01
中文翻译:
基于Alq3:NPD混合物的有机可见盲光电探测器在近紫外探测中的应用研究
摘要 在本文中,我们提出了一种对紫外线具有高灵敏度的可见盲有机光电探测器。活性层是作为受体材料的三(8-羟基喹啉)铝(Alq3)与 N, N'-Di [(1-萘基)-N, N'-二苯基]-( 1, 1'-联苯)-4, 4'-二胺(NPD)作为供体材料。该器件采用简单的溶液处理方法制造,结构为 ITO/PEDOT:PSS/Alq3:NPD/LiF/Al。晶体薄膜的光学特性在可见光波长下是完全透明的,并在紫外线频率下吸收光。此外,当添加更多的Alq3,即相对于主体的2、3和4时,它表现出光致发光强度的发射猝灭。在电气特性方面,优化的器件(2:1 混合比)表现出 25 的高灵敏度,300 在 -2 施加偏压和 40 mW/cm2 紫外光照射下。发现紫外线传感器的响应时间和恢复时间分别为 0.69 秒和 0.36 秒。结果表明,Alq3/NPD 的混合物具有高光敏性和对 365 nm 波长紫外光的快速响应,可用于制造具有成本效益和高灵敏度的紫外光电探测器。