Helil Zulpikar, Abdiryim Tursun, Jamal Ruxangul, Kadir Aygul, Che Yuzhu, Zou Dongna, Niyaz Mariyam
Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, College of Chemistry, Xinjiang University Urumqi 830046 P. R. China
Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Xinjiang Uygur Autonomous Region, Xinjiang University Urumqi 830046 P. R. China.
RSC Adv. 2021 Apr 28;11(26):15825-15834. doi: 10.1039/d1ra01962g. eCollection 2021 Apr 26.
Ultraviolet (UV) detectors based on zinc oxide (ZnO) nanorods (NRs) are ideal materials for UV radiation detection. However, owing to the surface effect of ZnO NRs, their speed of photoresponse and photosensitivity need to be improved. In this study, a UV photodetector was fabricated electrochemical coating of poly(3,4-propylenedioxythiophene) grafted with functional groups (-OH) on a hydrothermally grown ZnO NRs. For comparison, poly(3,4-propylenedioxythiophene)/ZnO composites were synthesized using the same method. The structure of the composite film was characterized by Fourier transform infrared spectroscopy (FT-IR), UV-visible spectroscopy (UV-vis), X-ray diffraction (XRD), Raman spectroscopy (Raman), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). The effect of the polymer structure on the UV sensing ability of ZnO NRs was evaluated by fabricating a UV detector with a composite material. The structural results indicated that the PProDOT-type conductive polymer and ZnO composites were successfully synthesized. The UV photodetection results showed that the presence of functional groups (-OH) in polymer chains could enhance the responsivity of the material. The response time of the ZnO/PProDOT-OH composite was 15 s shorter than that of the ZnO/PProDOT composite. A rise in photocurrent induced an increase from 2.5 A W to 34.75 A W in the UV photoresponsivity of the ZnO/PProDOT-OH composite, compared with that of the pure ZnO NRs. The external quantum efficiency and detectivity significantly improved, the increases of which were attributed to the coupling of the polymer and ZnO NRs.
基于氧化锌（ZnO）纳米棒（NRs）的紫外（UV）探测器是用于紫外辐射探测的理想材料。然而，由于ZnO纳米棒的表面效应，其光响应速度和光敏性有待提高。在本研究中，通过在水热生长的ZnO纳米棒上电化学涂覆接枝有官能团（-OH）的聚（3,4-亚丙基二氧噻吩）制备了一种紫外光探测器。为作比较，采用相同方法合成了聚（3,4-亚丙基二氧噻吩）/ZnO复合材料。通过傅里叶变换红外光谱（FT-IR）、紫外可见光谱（UV-vis）、X射线衍射（XRD）、拉曼光谱（Raman）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）和能量色散X射线能谱（EDS）对复合膜的结构进行了表征。通过用复合材料制备紫外探测器，评估了聚合物结构对ZnO纳米棒紫外传感能力的影响。结构结果表明成功合成了PProDOT型导电聚合物与ZnO的复合材料。紫外光探测结果表明，聚合物链中官能团（-OH）的存在可提高材料的响应度。ZnO/PProDOT-OH复合材料的响应时间比ZnO/PProDOT复合材料短15 s。与纯ZnO纳米棒相比，光电流的增加使ZnO/PProDOT-OH复合材料的紫外光响应度从2.5 A/W提高到34.75 A/W。外量子效率和探测率显著提高，其增加归因于聚合物与ZnO纳米棒的耦合。
