Fabrication and Characterization of High-Quality UV Photodetectors Based ZnO Nanorods Using Traditional and Modified Chemical Bath Deposition Methods

Nanomaterials

Munirah Abullah Almessiere¹  Azeez Abdullah Barzinjy²  Sabah Mohammed Ahmed³  Ahmed Fattah Abdulrahman⁴  Naser Mahmoud Ahmed⁵  Samir Mustafa Hamad⁶ 

[1] Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia;Department of Physics, College of Education, Salahaddin University-Erbil, Erbil 44001, Kurdistan Region, Iraq;Department of Physics, College of Science, University of Duhok, Duhok 42001, Kurdistan Region, Iraq;Department of Physics, Faculty of Science, University of Zakho, Zakho 42002, Kurdistan Region, Iraq;School of Physics, Universiti Sains Malaysia, Penang 11800, Malaysia;Scientific Research Centre, Soran University, Soran 44008, Kurdistan Region, Iraq;

关键词: UV photodetectors;    ZnO nanorods;    M-CBD;    growth duration;    RF sputtering;   

DOI  :  10.3390/nano11030677

来源: DOAJ

【 摘 要 】

Ultraviolet (UV) photodetectors (PDs) based on high-quality well-aligned ZnO nanorods (NRs) were fabricated using both modified and conventional chemical bath deposition (CBD) methods. The modified chemical bath deposition (M-CBD) method was made by adding air bubbles to the growth solution during the CBD process. The viability and effectiveness of M-CBD were examined by developing UV PDs based on ZnO NRs. The ZnO nano-seed layer was coated on a glass substrate utilizing radiofrequency (RF) sputtering. The impact of the different growth-times on morphology, growth rate, crystal structure, and optical and chemical properties were investigated systematically using different characterization techniques, such as field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) analysis, UV–VIS double beam spectrometer, and energy dispersive X-ray analysis (EDX), respectively. The Al/ZnO UV PDs based on ZnO nanorods were fabricated with optimum growth conditions through the two methods of preparation. This study showed that the synthesized ZnO NRs using the M-CBD method for different growth times possess better properties than the conventional method under similar deposition conditions. Despite having the highest aspect ratio and growth rate of ZnO NRs, which were found at 4 h growth duration for both methods, the aspect ratio of ZnO NRs using the M-CBD technique was comparatively higher than the conventional CBD method. Besides, the UV PDs fabricated by the M-CBD method at 5 V bias voltage showed high sensitivity, short response time, quick recovery time, high gain, low dark current, and high photocurrent compared with the UV PD device fabricated by the conventional CBD method.

【 授权许可】

Unknown