Laser Crystallization of Solution Based Nanomaterials

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2014-CHEN-66819
Due to superior chemical stability in reducing environments and amenability to doping with a wide range of materials, aluminum doped zinc oxide (AZO) is being researched and developed to replace traditional transparent conductive oxide (TCO) films in applications such as touchscreens. Currently, various deposition techniques, such as DC sputtering, pulsed laser deposition, and chemical vapor deposition, are applied to prepare high quality AZO films. However, these high vacuum methods are plagued with issues including instrumental complexity, high investment costs, and limited scalability.

Researchers at Purdue University have developed a non-vacuum method to deposit transparent conductive AZO films. This method, using combined aqueous solution based fabrication and post UV laser crystallization, yields improved structural and optoelectronic properties. The UV laser crystallization significantly minimized defects, leading to less charge carrier scattering centers, higher carrier mobility, and better electrical conductivity. Furthermore, this method is low-cost and practical for large-scale manufacturing.

Advantages:
-Improved structural and optoelectronic properties
-Feasible for large scale manufacturing
-High electrical conductivity and transparency

Potential Applications:
-Touchscreen displays
Feb 26, 2016
Utility Patent
United States
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Feb 26, 2016
PCT-Patent
WO
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Apr 3, 2015
Provisional-Patent
United States
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Feb 27, 2015
Provisional-Patent
United States
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