Related Experiment Video
Updated: Feb 11, 2026

Compact Quantum Dots for Single-molecule Imaging
Published on: October 9, 2012
Enhanced UV absorption of GaN photodiodes with a ZnO quantum dot coating layer
Abstract:
Light absorption at the surface of a photodiode can be enhanced by employing nanostructures smaller than the wavelength of interest. In this study, a ZnO quantum dot (QD) coating layer was investigated for improving the light absorption of gallium nitride (GaN) ultraviolet (UV) photodiodes. A GaN surface coated with a ZnO QD solution exhibited significantly lower surface reflection than an uncoated GaN surface, which, in turn, improved the responsivity of the GaN photodiode. In comparison with other nanostructure or multilayer thin film processes, the proposed ZnO QD coating process is simple and effective in enhancing UV light absorption.
Related Concept Videos
Quantum Numbers
The Quantum-Mechanical Model of an Atom
The Dot Product
Dot Product
In engineering, the dot product of any two vectors is the product of the magnitudes of the vectors and the cosine of the angle between them. It is denoted by a dot symbol between the two vectors.
Consider a vehicle pulling an object along the ground using a rope. If the rope makes an angle with the horizontal axis, the work done can be calculated using the dot product of the force applied and the object's displacement.
The dot...
Drug Absorption: Factors Affecting GI Absorption
Dot Product: Problem Solving
Identify the problem: Start by reading the problem and...

