Related Experiment Video
Updated: Feb 15, 2026
11:36
Analyzing Synaptic Modulation of Drosophila melanogaster Photoreceptors after Exposure to Prolonged Light
Published on: February 10, 2017
7.0K
Light Modulation and Water Splitting Enhancement Using a Composite Porous GaN Structure
Chao Yang1,2, Xin Xi1,2, Zhiguo Yu1
1Semiconductor Lighting Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences , No. A35, Qinghua East Road, Haidian District, Beijing 100083, China.
ACS Applied Materials & Interfaces
|January 20, 2018
Summary
We developed a composite porous gallium nitride (GaN) structure that significantly enhances solar water splitting. This novel material reduces UV light reflection and boosts photocurrent by 4.5 times, paving the way for efficient hydrogen production.
Area of Science:
- Materials Science
- Photocatalysis
- Nanotechnology
Background:
- Gallium nitride (GaN) is a promising material for photocatalysis.
- Improving light absorption and charge carrier separation is crucial for efficient solar water splitting.
Purpose of the Study:
- To design and fabricate a composite porous GaN structure with both lateral and vertical holes.
- To investigate the mechanism behind enhanced water splitting performance.
Main Methods:
- Fabrication of composite porous GaN with ordered lateral and vertical holes.
- Experimental measurement of UV reflectance and photocurrent.
- Finite-difference time-domain (FDTD) method for optical field modulation analysis.
Main Results:
- The composite porous GaN structure reduced UV reflectance and increased saturation photocurrent by approximately 4.5 times compared to planar GaN.
- Vertical holes facilitated electrolyte access, reduced gas bubble migration, and modulated the light field.
- Enhanced light trapping and strong optical coupling within nanoholes dramatically increased localized electric fields.
Conclusions:
- The composite porous GaN structure offers a novel approach for developing highly efficient photoelectrodes for solar water splitting.
- The combination of lateral and vertical porosity optimizes light management and charge dynamics for improved photocatalytic activity.
Related Concept Videos
01:22Sperm Structure and Semen Composition
11.7K
During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
11.7K
03:35Classifying Matter by Composition
91.9K
Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated.
A mixture is composed of two or...
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated.
A mixture is composed of two or...
91.9K
01:23States of Water
57.5K
Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart.
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
57.5K
02:16Light Acquisition
9.6K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
9.6K
02:34Structural Isomerism
21.8K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
21.8K
01:13¹H NMR: Complex Splitting
1.9K
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
1.9K