Abstract
We have developed a simple method for depositing high quality platinum (Pt) metal contacts without the necessity of placing the substrate in vacuum or heating it above 180 °C. This method is particularly beneficial for hydrated oxide ceramics, as it prevents water loss and subsequent conductivity degradation. A mixture of two organic solvents was used: ethylene glycol monoethyl ether (EEE) and acetone. By dispersing the precursor PtCl4 in this mixed non-volatile/volatile solvent, homogeneous drying patterns were achieved. EEE was used as the reducing agent, providing a relatively slow rate of Pt deposition, and thereby avoiding formation and subsequent coagulation of Pt clusters. Drop casting of the solution (25 μL/cm2) on mirror-polished surfaces was performed at 25 °C followed by 5 min partial solvent evaporation. The substrate was then heated to 180 °C for ~30 s, resulting in the formation of a metallic Pt layer. The method was successfully tested on 5 mol% Y doped BaZrO3 and 10 mol% Gd doped ceria ceramic pellets, alumina plates, and Kapton ® polymer sheets. The in-plane sheet resistance was 30–110 Ω at room temperature after a single deposition cycle. Because of its versatility and low cost per deposition, the proposed method is very promising for a variety of substrates where high quality electrical contacts prepared at low temperature are required.
| Original language | English |
|---|---|
| Article number | 114994 |
| Journal | Solid State Ionics |
| Volume | 339 |
| DOIs | |
| Publication status | Published - Oct 15 2019 |
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ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
Cite this
Solution deposition of Pt contacts suited to proton-conducting ceramics. / Makagon, Evgeniy; Wachtel, E.; Merkle, Rotraut; Lubomirsky, Igor.
In: Solid State Ionics, Vol. 339, 114994, 15.10.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Solution deposition of Pt contacts suited to proton-conducting ceramics
AU - Makagon, Evgeniy
AU - Wachtel, E.
AU - Merkle, Rotraut
AU - Lubomirsky, Igor
PY - 2019/10/15
Y1 - 2019/10/15
N2 - We have developed a simple method for depositing high quality platinum (Pt) metal contacts without the necessity of placing the substrate in vacuum or heating it above 180 °C. This method is particularly beneficial for hydrated oxide ceramics, as it prevents water loss and subsequent conductivity degradation. A mixture of two organic solvents was used: ethylene glycol monoethyl ether (EEE) and acetone. By dispersing the precursor PtCl4 in this mixed non-volatile/volatile solvent, homogeneous drying patterns were achieved. EEE was used as the reducing agent, providing a relatively slow rate of Pt deposition, and thereby avoiding formation and subsequent coagulation of Pt clusters. Drop casting of the solution (25 μL/cm2) on mirror-polished surfaces was performed at 25 °C followed by 5 min partial solvent evaporation. The substrate was then heated to 180 °C for ~30 s, resulting in the formation of a metallic Pt layer. The method was successfully tested on 5 mol% Y doped BaZrO3 and 10 mol% Gd doped ceria ceramic pellets, alumina plates, and Kapton ® polymer sheets. The in-plane sheet resistance was 30–110 Ω at room temperature after a single deposition cycle. Because of its versatility and low cost per deposition, the proposed method is very promising for a variety of substrates where high quality electrical contacts prepared at low temperature are required.
AB - We have developed a simple method for depositing high quality platinum (Pt) metal contacts without the necessity of placing the substrate in vacuum or heating it above 180 °C. This method is particularly beneficial for hydrated oxide ceramics, as it prevents water loss and subsequent conductivity degradation. A mixture of two organic solvents was used: ethylene glycol monoethyl ether (EEE) and acetone. By dispersing the precursor PtCl4 in this mixed non-volatile/volatile solvent, homogeneous drying patterns were achieved. EEE was used as the reducing agent, providing a relatively slow rate of Pt deposition, and thereby avoiding formation and subsequent coagulation of Pt clusters. Drop casting of the solution (25 μL/cm2) on mirror-polished surfaces was performed at 25 °C followed by 5 min partial solvent evaporation. The substrate was then heated to 180 °C for ~30 s, resulting in the formation of a metallic Pt layer. The method was successfully tested on 5 mol% Y doped BaZrO3 and 10 mol% Gd doped ceria ceramic pellets, alumina plates, and Kapton ® polymer sheets. The in-plane sheet resistance was 30–110 Ω at room temperature after a single deposition cycle. Because of its versatility and low cost per deposition, the proposed method is very promising for a variety of substrates where high quality electrical contacts prepared at low temperature are required.
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U2 - 10.1016/j.ssi.2019.06.002
DO - 10.1016/j.ssi.2019.06.002
M3 - Article
VL - 339
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
M1 - 114994
ER -