Hydrothermally grown of well-aligned ZnONRs: dependence of alignment ordering upon precursor concentration

Marjoni Imamora Ali Umar, Fitri Yenni Naumar, Muhamad Mat Salleh, Ali Umar Akrajas

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The well-aligned Zinc Oxide Nanorods (ZnONRs) arrays was obtained through a hydrothermal process at various precursor concentrations (PC) under a growth temperature of 90 °C for an hour. The effect of PC (0.02, 0.03, 0.04, 0.05, and 0.06 M which is denoted as K0.01–K0.06) to the structural, optical, and morfology (diameter, height, slope, and density) of ZnONRs were studied by using X-ray diffraction, UV–Vis spectroscopy, and field emission scanning electron microscopy (FESEM). As-synthesized ZnONRs exhibit an uniform growth direction along the [002] orientations with average diameters in the range of 40–90 nm. These nanorods showed a strong optical absorption peak centering at 367 nm,which is equivalent to optical energy band gap of ZnO 3.37 eV, confirming the formation of ZnONRs. The morfology of ZnONRs in term of diameter, height, slope, and density increases with the PC. The highest density of approximately 182 number/µm−2 with average slope of 6 degree (aligning percentage of 83 ± 12%) was obtained at the PC of K0.04. It is interesting to find that the dye sensitized solar cell utilizing the sample K0.04 showed five times increasing in the power conversion efficiency as compared to that of device utilizing K0.02 sample.

Original languageEnglish
Pages (from-to)6892-6897
Number of pages6
JournalJournal of Materials Science: Materials in Electronics
Volume29
Issue number8
DOIs
Publication statusPublished - 1 Apr 2018

Fingerprint

Zinc Oxide
Zinc oxide
Nanorods
zinc oxides
nanorods
alignment
slopes
Growth temperature
Field emission
Band structure
Light absorption
Conversion efficiency
energy bands
field emission
Energy gap
optical absorption
solar cells
dyes
Spectroscopy
X ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Hydrothermally grown of well-aligned ZnONRs : dependence of alignment ordering upon precursor concentration. / Umar, Marjoni Imamora Ali; Naumar, Fitri Yenni; Mat Salleh, Muhamad; Akrajas, Ali Umar.

In: Journal of Materials Science: Materials in Electronics, Vol. 29, No. 8, 01.04.2018, p. 6892-6897.

Research output: Contribution to journalArticle

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