Abstract
We report a simple approach of fabricating thermoelectric γ-NaxCoO2 film with the c-axis orientation using the sol-gel spin-coating method. The inferred sodium content is x = 0.65 according to the correlation between the c-axis lattice constant and x. Temperature dependence of both the resistivity and thermopower resembles that of the γ-Na0.68CoO2 film grown by the reactive solid-phase epitaxy. The fitted thermopower data show that the bandwidth of γ-NaxCoO2 is found to be ~ 101 meV, being close to the quasi-particle band (70-100 meV) derived from an angle-resolved photoemission study of γ-Na0.7CoO2. These results enable the possibility of low-cost fabrication of γ-NaxCoO2-based thermoelectric film devices. Furthermore, we have also topotactically transformed the of γ-NaxCoO2 film to a superconducting Nax(H2O)yCoO2-δ film with Tc, onset = 4.12 K.
| Original language | English |
|---|---|
| Pages (from-to) | 91-93 |
| Number of pages | 3 |
| Journal | Thin Solid Films |
| Volume | 518 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2009 Nov 2 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry
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A simple approach of fabricating thermoelectric γ-NaxCoO2 and superconductive Nax(H2O)yCoO2-δ films using the sol-gel spin-coating method. / Liu, Chia Jyi; Nayak, Pradipta K.; Chen, Yong Zhi.
In: Thin Solid Films, Vol. 518, No. 1, 02.11.2009, p. 91-93.Research output: Contribution to journal › Article
TY - JOUR
T1 - A simple approach of fabricating thermoelectric γ-NaxCoO2 and superconductive Nax(H2O)yCoO2-δ films using the sol-gel spin-coating method
AU - Liu, Chia Jyi
AU - Nayak, Pradipta K.
AU - Chen, Yong Zhi
PY - 2009/11/2
Y1 - 2009/11/2
N2 - We report a simple approach of fabricating thermoelectric γ-NaxCoO2 film with the c-axis orientation using the sol-gel spin-coating method. The inferred sodium content is x = 0.65 according to the correlation between the c-axis lattice constant and x. Temperature dependence of both the resistivity and thermopower resembles that of the γ-Na0.68CoO2 film grown by the reactive solid-phase epitaxy. The fitted thermopower data show that the bandwidth of γ-NaxCoO2 is found to be ~ 101 meV, being close to the quasi-particle band (70-100 meV) derived from an angle-resolved photoemission study of γ-Na0.7CoO2. These results enable the possibility of low-cost fabrication of γ-NaxCoO2-based thermoelectric film devices. Furthermore, we have also topotactically transformed the of γ-NaxCoO2 film to a superconducting Nax(H2O)yCoO2-δ film with Tc, onset = 4.12 K.
AB - We report a simple approach of fabricating thermoelectric γ-NaxCoO2 film with the c-axis orientation using the sol-gel spin-coating method. The inferred sodium content is x = 0.65 according to the correlation between the c-axis lattice constant and x. Temperature dependence of both the resistivity and thermopower resembles that of the γ-Na0.68CoO2 film grown by the reactive solid-phase epitaxy. The fitted thermopower data show that the bandwidth of γ-NaxCoO2 is found to be ~ 101 meV, being close to the quasi-particle band (70-100 meV) derived from an angle-resolved photoemission study of γ-Na0.7CoO2. These results enable the possibility of low-cost fabrication of γ-NaxCoO2-based thermoelectric film devices. Furthermore, we have also topotactically transformed the of γ-NaxCoO2 film to a superconducting Nax(H2O)yCoO2-δ film with Tc, onset = 4.12 K.
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U2 - 10.1016/j.tsf.2009.06.038
DO - 10.1016/j.tsf.2009.06.038
M3 - Article
AN - SCOPUS:69549114551
VL - 518
SP - 91
EP - 93
JO - Thin Solid Films
JF - Thin Solid Films
SN - 0040-6090
IS - 1
ER -