أعرض تسجيلة المادة بشكل مبسط
| dc.contributor |
Chang, Chih-Hung |
|
| dc.contributor |
Rorrer, Gregory |
|
| dc.contributor |
Herman, Gregory |
|
| dc.contributor |
Plant, Thomas |
|
| dc.contributor |
Remcho, Vincent |
|
| dc.date |
2007-05-17T14:32:45Z |
|
| dc.date |
2007-05-17T14:32:45Z |
|
| dc.date |
2007-05-02 |
|
| dc.date |
2007-05-17T14:32:45Z |
|
| dc.date.accessioned |
2013-10-16T07:49:27Z |
|
| dc.date.available |
2013-10-16T07:49:27Z |
|
| dc.date.issued |
2013-10-16 |
|
| dc.identifier |
http://hdl.handle.net/1957/4930 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1957/4930 |
|
| dc.description |
Graduation date: 2007 |
|
| dc.description |
The focus of this study is to develop a general and low-cost solution-based
process to fabricate micro- and nano-structured semiconductors that are suitable
for electronics. This process uses simple metal halide precursors dissolved in a
solvent (organic or aqueous) and is capable of forming uniform and continuous
thin films via digital fabrication (e.g. inkjet printing) and blanket coating (e.g. spin
coating and chemical bath deposition). It has been demonstrated for the deposition
of a variety of semiconducting metal oxides including binary oxides (ZnO, In2O3,
SnO2), ternary oxides (Zinc-Indium-Oxide (ZIO), Indium-Tin-Oxide (ITO), Zinc-
Tin-Oxide (ZTO)) and quaternary oxides, Indium-Zinc-Tin-Oxide (IZTO).
Functional thin film transistors with high field-effect mobility were successfully
fabricated using channel layers deposited from this process (μFE ≅ 30 cm2/V-sec
from inkjet printed IZTO channel layers).
This rather simple solution-based deposition process was used to fabricate
3-D nano-structured silicate-based luminescent materials from diatom frustules. A
diatom is a single-celled microalgae that possesses cell walls composed of
amorphous silica (SiO2) with nano- and microstructures. Nanocrystalline Zn2SiO4
thin films with Mn dopants on the frustules isolated from the cultured marine
diatoms Pinnularia sp. by a combination of chemical solution deposition of ZnO
thin film and solid-solid reaction between ZnO and SiO2(diatom) by thermal
annealing processes. This material exhibited bright green photoluminescence. Two
types of nanostructures could be generated depending upon the level of the initial
chemical deposition coverage. This process is capable of preserving the threedimensional
shape of the diatom frustules at the nanometer scale.
Using this process and the direct writing capability of the inkjet printing
process, patterned Zn2SiO4:Mn2+ green phosphors and Yi2SiO5:Eu3+ were
fabricated. At first, a layer of diatom frustules was spun-coated onto a silicon
substrate and followed by the inkjet printing of aqueous metal halide solutions
with desired patterns. The metal silicate phosphors were generated after a thermal
annealing process. SEM analysis verified that the nano- and microstructures of the
diatom frustules were preserved after the process. The patterned phosphors
exhibited highly bright green (Mn2+ dopant) and orange (Eu3+ dopant)
photoluminescence under 254nm UV excitation. |
|
| dc.language |
en_US |
|
| dc.subject |
Thin-film |
|
| dc.subject |
Inkjet |
|
| dc.subject |
TFT |
|
| dc.subject |
inorganic |
|
| dc.title |
Development of solution-based reaction processes for micro- and nano-structured semiconductors |
|
| dc.type |
Thesis |
|
الملفات في هذه المادة
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لا توجد أي ملفات مرتبطة بهذه المادة.
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أعرض تسجيلة المادة بشكل مبسط