Using Modified-Intake Plasma-Enhanced Metal-Organic Chemical Vapor Deposition System to Grow Gallium Doped Zinc Oxide

Area of Science:

• Materials Science
• Semiconductor Physics

Background:

• Gallium-doped zinc oxide (GZO) is a transparent conductive oxide with potential applications in optoelectronics.
• Optimizing GZO thin film properties is crucial for enhancing device performance.

Purpose of the Study:

• To fabricate GZO thin films using a modified-intake plasma-enhanced metal-organic chemical vapor deposition (MIPEMOCVD) system.
• To investigate the effect of Ga content on GZO thin film properties and their application in LEDs.

Main Methods:

• Fabrication of GZO thin films with varying Ga content using MIPEMOCVD.
• Crystalline analyses and Hall measurements to study Ga atom incorporation mechanisms.
• Application of optimal GZO films as window layers in n-ZnO/p-GaN LEDs.

Main Results:

• The MIPEMOCVD system enabled uniform precursor distribution and reduced bombardment damage.
• Optimal Ga content of 3.01 at% yielded the highest conductivity and transmittance.
• GZO-based LEDs exhibited enhanced light output power and light extraction efficiency compared to ITO-based LEDs.

Conclusions:

• MIPEMOCVD is an effective technique for fabricating high-quality GZO thin films.
• Optimized GZO films serve as superior window layers for n-ZnO/p-GaN LEDs, improving device performance.