Abstract
Vertically aligned ZnO nanorods having high optical quality were prepared by a hydrothermal-electrochemical method. The nanorods were synthesized in a Zn(NO3)2 aqueous solution on Si substrates which were coated with a platinum conducting layer and a ZnO seed layer. They possessed a single-crystal würtzite structure and grew along the c-axis, perpendicular to the substrates. The height and diameter of the ZnO nanorods were up to ̃4.3 μm and 90-150 nm, respectively. The morphological, structural, and photoluminescence properties of the ZnO nanorods were examined with respect to the growth temperature (120-180 °C) and the presence of NaOH additive. The nanorods synthesized at high temperature (180 °C) exhibited a strong UV emission and a weak defect-related visible emission leading to a UV-visible ratio of ̃230. This high optical quality was attributed to the increased growth rate of ZnO nanorods (̃4.3 μm/h) which was caused by the high growth temperature (180 °C). This was based on the fact that the ZnO phase is thermodynamically more favorable than the defect-related Zn(OH)2 phase at higher temperature. Since the growth temperature was compatible with polymer materials, our synthetic method may provide a promising way for fabricating high performance optoelectronic devices on flexible polymer substrates.
| Original language | English |
|---|---|
| Pages (from-to) | 3615-3620 |
| Number of pages | 6 |
| Journal | Crystal Growth and Design |
| Volume | 9 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2009 Aug 5 |
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ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
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Hydrothermal-electrochemical synthesis of ZnO nanorods. / Park, Seong Kyong; Park, Jae Hyoung; Ko, Ki Young; Yoon, Sungho; Chu, Kyo Seon; Kim, Woong; Do, Young Rag.
In: Crystal Growth and Design, Vol. 9, No. 8, 05.08.2009, p. 3615-3620.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hydrothermal-electrochemical synthesis of ZnO nanorods
AU - Park, Seong Kyong
AU - Park, Jae Hyoung
AU - Ko, Ki Young
AU - Yoon, Sungho
AU - Chu, Kyo Seon
AU - Kim, Woong
AU - Do, Young Rag
PY - 2009/8/5
Y1 - 2009/8/5
N2 - Vertically aligned ZnO nanorods having high optical quality were prepared by a hydrothermal-electrochemical method. The nanorods were synthesized in a Zn(NO3)2 aqueous solution on Si substrates which were coated with a platinum conducting layer and a ZnO seed layer. They possessed a single-crystal würtzite structure and grew along the c-axis, perpendicular to the substrates. The height and diameter of the ZnO nanorods were up to ̃4.3 μm and 90-150 nm, respectively. The morphological, structural, and photoluminescence properties of the ZnO nanorods were examined with respect to the growth temperature (120-180 °C) and the presence of NaOH additive. The nanorods synthesized at high temperature (180 °C) exhibited a strong UV emission and a weak defect-related visible emission leading to a UV-visible ratio of ̃230. This high optical quality was attributed to the increased growth rate of ZnO nanorods (̃4.3 μm/h) which was caused by the high growth temperature (180 °C). This was based on the fact that the ZnO phase is thermodynamically more favorable than the defect-related Zn(OH)2 phase at higher temperature. Since the growth temperature was compatible with polymer materials, our synthetic method may provide a promising way for fabricating high performance optoelectronic devices on flexible polymer substrates.
AB - Vertically aligned ZnO nanorods having high optical quality were prepared by a hydrothermal-electrochemical method. The nanorods were synthesized in a Zn(NO3)2 aqueous solution on Si substrates which were coated with a platinum conducting layer and a ZnO seed layer. They possessed a single-crystal würtzite structure and grew along the c-axis, perpendicular to the substrates. The height and diameter of the ZnO nanorods were up to ̃4.3 μm and 90-150 nm, respectively. The morphological, structural, and photoluminescence properties of the ZnO nanorods were examined with respect to the growth temperature (120-180 °C) and the presence of NaOH additive. The nanorods synthesized at high temperature (180 °C) exhibited a strong UV emission and a weak defect-related visible emission leading to a UV-visible ratio of ̃230. This high optical quality was attributed to the increased growth rate of ZnO nanorods (̃4.3 μm/h) which was caused by the high growth temperature (180 °C). This was based on the fact that the ZnO phase is thermodynamically more favorable than the defect-related Zn(OH)2 phase at higher temperature. Since the growth temperature was compatible with polymer materials, our synthetic method may provide a promising way for fabricating high performance optoelectronic devices on flexible polymer substrates.
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UR - http://www.scopus.com/inward/citedby.url?scp=68949101973&partnerID=8YFLogxK
U2 - 10.1021/cg9003593
DO - 10.1021/cg9003593
M3 - Article
AN - SCOPUS:68949101973
VL - 9
SP - 3615
EP - 3620
JO - Crystal Growth and Design
JF - Crystal Growth and Design
SN - 1528-7483
IS - 8
ER -