2단계 수열합성을 이용한ZnO 계층 나노구조 기반 UV 센서제작
Fabrication of UV Sensor Based on ZnO Hierarchical Nanostructure Using Two-step Hydrothermal Growth
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Ultraviolet (UV) sensors are widely applied in industrial and military fields such as environmental monitoring, medicine and astronomy. Zinc oxide (ZnO) is considered as one of the promising materials for UV sensors because of its ease of fabrication, wide bandgap (3.37 eV) and high chemical stability. In this study, we used the hydrothermal growth of ZnO to form two types of ZnO nanostructures (Nanoflower and nanorod) and applied them to a UV sensor. To improve the performance of the UV sensor, the hydrothermal growth was used in a two-step process for fabricating ZnO hierarchical nanostructures. The fabricated ZnO hierarchical nanostructure improved the performance of the UV sensor by increasing the ratio of volume to surface area and the number of nanojunctions compared to onestep hydrothermal grown ZnO nanostructure. The UV sensor based on the ZnO hierarchical nanostructure had a maximum photocurrent of 44 µA, which is approximately 3 times higher than that of a single nanostructure. The UV sensor fabrication method presented in this study is simple and based on the hydrothermal solution process, which is advantageous for large-area production and mass production; this provides scope for extensive research in the field of UV sensors
Abstract
Ultraviolet (UV) sensors are widely applied in industrial and military fields such as environmental monitoring, medicine and astronomy. Zinc oxide (ZnO) is considered as one of the promising materials for UV sensors because of its ease of fabrication, wide bandgap (3.37 eV) and high chemical stability. In this study, we used the hydrothermal growth of ZnO to form two types of ZnO nanostructures (Nanoflower and nanorod) and applied them to a UV sensor. To improve the performance of the UV sensor, the hydrothermal growth was used in a two-step process for fabricating ZnO hierarchical nanostructures. The fabricated ZnO hierarchical nanostructure improved the performance of the UV sensor by increasing the ratio of volume to surface area and the number of nanojunctions compared to onestep hydrothermal grown ZnO nanostructure. The UV sensor based on the ZnO hierarchical nanostructure had a maximum photocurrent of 44 µA, which is approximately 3 times higher than that of a single nanostructure. The UV sensor fabrication method presented in this study is simple and based on the hydrothermal solution process, which is advantageous for large-area production and mass production; this provides scope for extensive research in the field of UV sensors
참고문헌 (20)
- H. Ohta, "Transparent oxide optoelectronics", Mater. Today, 7(6), pp.42~51 (2004)
- M. Razeghi, "Semiconductor ultraviolet detectors", J. Appl. Phys, 79(10), pp.7433~7473 (1996)
- T. Zhai, "A Comprehensive Review of One-Dimensional Metal-Oxide Nanostructure Photodetectors", Sensors, 9(8), pp.6504~6529 (2009)
- 문성철, "용액 공정 기반 NiO", ZnO계 자외선 센서용 재료 특성 연구, 2017, pp.30(8), 508~513[DOI]
- Z. L. Wang, "Zinc oxide nanostructures : growth, properties and applications", J. Phys. Condens. Matter., 16, pp.R829~R858 (2004)
- T. H. Moon, "The fabrication and characterization of ZnO UV detector", Appl. Surf. Sci., 240(1-4), pp.280~285 (2005)
- S. Kim, "Fabrication of a Novel Nanofluidic Device Featuring ZnO Nanochannels", ACS Omega, 5(7), pp.3144~3150 (2020)
- G. H. Kim, "Bioinspired Structural Colors Fabricated with ZnO Quasi-Ordered Nanostructures", ACS Appl. Mater. Interfaces, 9(22), pp.19057~19062 (2017)
- 마대영, "ZnO 나노로드 성장에 미치는 전구체 농도의 영향", 전기학회논문지, 65(11), pp.1835~1839 (2016), 대한전기학회[DOI]
- I. Y. Y. Bu, "High-performance ZnO nanoflake moisture sensor", Superlattices Microstruct, 51(6), pp.745~753 (2012)
- Q. Wan, "Fabrication and ethanol sensing characteristics of ZnO nanowire gas sensors", J. Appl. Phys, 84(18), pp.3654~3656 (2019)
- S. O. Brien, "ZnO thin films prepared by a single step sol-gel process", Thin Solid Films, 516(7), pp.1391~1395 (2008)
- Y. Zhang, "Temperature-dependent photoluminescence of nanocrystalline ZnO thin films grown on Si(100)substrate by the sol-gel process", Appl. Phys. Lett., 86(13), pp.131910(1)~131910(3) (2005)
- S. F. Akhtarianfar, "Improved sensitivity of UV sensors in hierarchically structured arrays of network-loaded ZnO nanorods via optimization techniques", RSC Adv, 7(51), pp.32316~32326 (2017)
- M. Guo, "The effect of hydrothermal growth temperature on preparation and photoelectrochemical performance of ZnO nanorod array films", J. Solid State Chem, 178(10), pp.3210~3215 (2005)
- F. Yi, "Simple fabrication of a ZnO nanorod array UV detector with a high performance", Physica E, 61, pp.180~184 (2014)
- M. R. Alenezi, "On-chip Fabrication of High Performance Nanostructured ZnO UV Detectors", Sci. Rep., 5, pp.8516(1)~8516(9) (2014)
- S. K. Panda, "Preparation of transparent ZnO thin films and their application in UV sensor devices", Solid-State Electron, 73, pp.44~50 (2012)
- B. Liu, "Hydrothermal Synthesis of ZnO Nanorods in the Diameter Regime of 50 nm", J. Am. Chem. Soc, 125(15), pp.4430~4431 (2003)
- C. Pacholski, "Self-Assembly of ZnO : From Nanodots to Nanorods", Angew. Chem. -Int. Edit, 41(7), pp.1188~1191 (2002)