Improved Ultraviolet Photoresponse Properties of ZnO Nanorods Grown by Using Hydrothermal Method Applied Rotating Precursor Solution

다국어 초록 (Multilingual Abstract)

We grew ZnO nanorods (NRs) using a hydrothermal method while rotating the precursor solution, and report the effect of rotation on surface modification, and the optical and ultraviolet (UV) photoresponse properties of the resulting ZnO nanorods. The ZnO NRs grown in the rotating precursor solution at 100 rpm had the longest length and diameter, which decreased with increasing rotation rate above 100 rpm. Also, the intensity of the diffraction peaks from ZnO (002) and (100) was strongest and weakest for the ZnO NRs grown in a rotating solution at 150 rpm, respectively, indicating improvement in the c-axis orientation of the ZnO NRs. In the PL spectra, near-band-edge (NBE) and deep-level (DL) emissions were observed from all of the ZnO NRs. The intensity of the NBE emission gradually increased with increasing rotation rate, due to the increase in surface area. Also, the intensity of the DL emission gradually increased with increasing rotation rate because of the increasing number of interstitial oxygens. Analysis of the UV photoresponse found the photocurrent of the ZnO NRs grown in the rotating precursor solution was higher than that of ZnO NRs grown in a non-rotated precursor solution. In particular, ZnO NRs grown in a rotating precursor solution at 150 rpm exhibited the highest value of photosensitivity, with high reproducibility.

참고문헌 (Reference)

1 C. V. V. M. Gopi, 4 : 8161-, 2016

2 K. Ogata, 214 : 312-, 2000

3 J. H. Jun, 35 : 2797-, 2009

4 Ü. Özgür, 98 : 041301-, 2005

5 M. Arshad, 161 : 275-, 2015

6 M. Gong, 11 : 4114-, 2017

7 S. Dhar, 53 : 101-, 2018

8 A. Hassan, 30 : 5170-, 2019

9 S. Zhang, 155 : 65-, 2015

10 C. J. Barnett, 243 : 144-, 2019

11 E. Muñoz, 13 : 7115-, 2001

12 S. Liang, 225 : 110-, 2001

13 M. H. Mamata, 171 : 241-, 2011

14 M. Rosina, 40 : 242-, 2009

15 S. -M. Lam, 167 : 141-, 2016

16 N. S. Ridhuan, 7 : e50405-, 2012

17 G. N. Narayanan, 598 : 39-, 2016

18 D. Polsongkrama, 403 : 3713-, 2008

19 C. Peng, 654 : 371-, 2016

20 김상우, "Synthesis, Characterization and Gas‑Sensing Properties of Pristine and SnS2 Functionalized TeO2 Nanowires" 대한금속·재료학회 25 (25): 805-813, 2019

21 박영빈, "Preparation of High-Quality ZnO Nanorods by Electrodeposition Using a Rotating Cathode and Improvements in their UV Sensing Properties" 대한화학회 37 (37): 1278-1284, 2016

22 김유성, "Electron Irradiation Effects on the Optical and Electrical Properties of ZnO/Ag/SnO2 Thin Films" 대한금속·재료학회 58 (58): 190-194, 2020

23 김강배, "Effect of Sintering Temperature on the Characteristics of Zn0.99Li0.01O Thin Film on Si Substrate" 대한금속·재료학회 58 (58): 257-262, 2020