Direct growth of oriented ZnO nanotubes by self-selective etching at lower temperature for photo-electrochemical (PEC) solar cell application

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Abstract

This paper presents a systematic study of the transformation of ZnO nanorods into ZnO nanotubes via a simple seed mediated growth hydrothermal technique at lower temperature. The growth process was carried out at 90 °C for 8 h to obtain high density ZnO nanorods, followed by decreasing the temperature of growth solution resulting in ZnO nanotubes. High density ZnO nanotubes have successfully been synthesized and grown directly on FTO substrate via self-selective etching at lower temperature for 16 h at 50 °C. It was found that the morphology of ZnO nanorod arrays in term of grain size and length increases with the growth time. The XRD analysis reveals that increasing the growth time and decreasing the growth temperature to 50 °C affect the crystallite size of ZnO nanostructure. The optical absorption varies with the growth time. These ZnO samples have been applied as photovoltaic materials in a photoelect-rochemical cell of FTO/ZnO/electrolyte/platinum. The PEC utilizing the ZnO nantubes demonstrates the JSC, VOC, FF and η of 0.39 mA cm 2, 0.36 V, 0.34% and 0.050%, respectively.

Original languageEnglish
Pages (from-to)153-158
Number of pages6
JournalJournal of Alloys and Compounds
Volume618
Issue number1
DOIs
Publication statusPublished - 5 Jan 2015

Fingerprint

Nanotubes
Etching
Solar cells
Nanorods
Temperature
Growth temperature
Crystallite size
Platinum
Volatile organic compounds
Light absorption
Electrolytes
Seed
Nanostructures
Substrates

Keywords

  • Nanorod
  • Nanotube
  • Photoelectrochemical cell
  • ZnO

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

Cite this

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abstract = "This paper presents a systematic study of the transformation of ZnO nanorods into ZnO nanotubes via a simple seed mediated growth hydrothermal technique at lower temperature. The growth process was carried out at 90 °C for 8 h to obtain high density ZnO nanorods, followed by decreasing the temperature of growth solution resulting in ZnO nanotubes. High density ZnO nanotubes have successfully been synthesized and grown directly on FTO substrate via self-selective etching at lower temperature for 16 h at 50 °C. It was found that the morphology of ZnO nanorod arrays in term of grain size and length increases with the growth time. The XRD analysis reveals that increasing the growth time and decreasing the growth temperature to 50 °C affect the crystallite size of ZnO nanostructure. The optical absorption varies with the growth time. These ZnO samples have been applied as photovoltaic materials in a photoelect-rochemical cell of FTO/ZnO/electrolyte/platinum. The PEC utilizing the ZnO nantubes demonstrates the JSC, VOC, FF and η of 0.39 mA cm 2, 0.36 V, 0.34{\%} and 0.050{\%}, respectively.",
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author = "L. Roza and {Abd Rahman}, {Mohd Yusri} and Akrajas, {Ali Umar} and {Mat Salleh}, Muhamad",
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AU - Roza, L.

AU - Abd Rahman, Mohd Yusri

AU - Akrajas, Ali Umar

AU - Mat Salleh, Muhamad

PY - 2015/1/5

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N2 - This paper presents a systematic study of the transformation of ZnO nanorods into ZnO nanotubes via a simple seed mediated growth hydrothermal technique at lower temperature. The growth process was carried out at 90 °C for 8 h to obtain high density ZnO nanorods, followed by decreasing the temperature of growth solution resulting in ZnO nanotubes. High density ZnO nanotubes have successfully been synthesized and grown directly on FTO substrate via self-selective etching at lower temperature for 16 h at 50 °C. It was found that the morphology of ZnO nanorod arrays in term of grain size and length increases with the growth time. The XRD analysis reveals that increasing the growth time and decreasing the growth temperature to 50 °C affect the crystallite size of ZnO nanostructure. The optical absorption varies with the growth time. These ZnO samples have been applied as photovoltaic materials in a photoelect-rochemical cell of FTO/ZnO/electrolyte/platinum. The PEC utilizing the ZnO nantubes demonstrates the JSC, VOC, FF and η of 0.39 mA cm 2, 0.36 V, 0.34% and 0.050%, respectively.

AB - This paper presents a systematic study of the transformation of ZnO nanorods into ZnO nanotubes via a simple seed mediated growth hydrothermal technique at lower temperature. The growth process was carried out at 90 °C for 8 h to obtain high density ZnO nanorods, followed by decreasing the temperature of growth solution resulting in ZnO nanotubes. High density ZnO nanotubes have successfully been synthesized and grown directly on FTO substrate via self-selective etching at lower temperature for 16 h at 50 °C. It was found that the morphology of ZnO nanorod arrays in term of grain size and length increases with the growth time. The XRD analysis reveals that increasing the growth time and decreasing the growth temperature to 50 °C affect the crystallite size of ZnO nanostructure. The optical absorption varies with the growth time. These ZnO samples have been applied as photovoltaic materials in a photoelect-rochemical cell of FTO/ZnO/electrolyte/platinum. The PEC utilizing the ZnO nantubes demonstrates the JSC, VOC, FF and η of 0.39 mA cm 2, 0.36 V, 0.34% and 0.050%, respectively.

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