Ultra-Wide Bandgap · Key Properties · Application Areas · 2026 Commercialization · High-Purity Raw Material Shortage
Gallium oxide (Ga2O3), an ultra-wide-bandgap semiconductor material, is attracting growing attention for its potential in next-generation power electronics and optoelectronic devices. With its outstanding electrical and optical properties, gallium oxide is emerging as a promising candidate for applications that demand high voltage, high power, high frequency, and high-temperature operation. As crystal growth technologies advance and the semiconductor industry moves toward larger wafer sizes, the commercialization of gallium oxide is accelerating. At the same time, the demand for high-purity raw materials is becoming increasingly important.
Gallium oxide has a bandgap of approximately 4.8–4.9 eV, significantly wider than that of conventional semiconductor materials such as silicon and silicon carbide. This ultra-wide bandgap gives gallium oxide excellent potential for high-voltage and high-power applications, making it a promising candidate for next-generation power semiconductor devices.
The theoretical breakdown electric field of gallium oxide can reach approximately 8 MV/cm, considerably higher than that of silicon and silicon carbide. This property enables devices to withstand higher electric fields and offers the potential to reduce device size while maintaining high voltage ratings.
The combination of a wide bandgap and a high breakdown electric field gives gallium oxide a high theoretical Baliga figure of merit (BFOM). This indicates its potential to achieve lower conduction losses in power devices, making it attractive for high-efficiency power conversion systems.
Gallium oxide exhibits good chemical and thermal stability, making it suitable for demanding operating environments. Its optical properties also make it useful in optoelectronic applications. In particular, its wide bandgap enables solar-blind ultraviolet detection, while its radiation resistance offers further potential for applications in challenging environments.
In addition, gallium oxide can be grown from the melt, providing a potential advantage in the development of large-diameter single crystals and substrates.
With the growing adoption of electric vehicles and the development of high-voltage power systems, demand for power semiconductor devices with higher efficiency and power density continues to increase. Gallium oxide‘s wide bandgap and high breakdown electric field make it a promising material for high-voltage power devices, including those used in 800 V electric vehicle platforms, fast-charging systems, and high-efficiency power conversion equipment.
Gallium oxide has a wide bandgap corresponding to a solar-blind ultraviolet response range of approximately 200–280 nm. This makes it suitable for solar-blind UV photodetectors, which can detect ultraviolet signals while minimizing interference from sunlight. Potential applications include flame detection, electrical discharge monitoring, environmental monitoring, and early-warning systems.
Gallium-containing materials are used in the preparation of gallium-doped zinc oxide (GZO) transparent conductive films. Gallium oxide can serve as a gallium source in the formulation of relevant sputtering targets. These materials have potential applications in transparent electrodes for display panels, photovoltaic devices, and other optoelectronic components.
Gallium oxide and related gallium-containing materials have potential applications in luminescent materials and scintillation-related materials. Their optical and electronic properties make them relevant to the development of functional materials for optoelectronic devices, radiation detection, and related fields.
Gallium oxide is also used in catalytic research and the development of specialty functional materials. Its surface properties, chemical stability, and interaction with other components make it a useful material for investigating catalytic processes and preparing functional oxide systems.
In March 2026, a Chinese company took the lead in producing a 12-inch gallium oxide single crystal, setting a new global record for crystal size. In September, another company became the first in the world to achieve constant-diameter growth of a 12-inch crystal, laying the groundwork for the mass production of large-diameter substrates. Meanwhile, 6-inch gallium oxide substrates had entered batch production and supply, with key performance indicators such as crystal defect levels and resistivity uniformity reaching internationally advanced levels.
In September 2026, a leading Chinese manufacturer of gallium oxide substrates completed a Series A strategic financing round. The funds will be primarily directed toward capacity expansion, technological upgrades, and downstream market development, marking a significant step in the transition of gallium oxide from laboratory research toward industrial-scale commercialization.
According to industry estimates, China‘s gallium oxide device market is expected to reach RMB 307 million in 2026, representing year-on-year growth of 58.2%. Power supplies for telecommunications equipment and optical modules have become the largest downstream application segment, while demand for photovoltaic and energy storage inverters, as well as industrial power supplies, continues to grow.
The 15th Five-Year Plan for the Development of the Electronic Information Manufacturing Industry, issued by the Ministry of Industry and Information Technology (MIIT) and the National Development and Reform Commission (NDRC), explicitly calls for promoting the commercialization of ultra-wide-bandgap semiconductors such as gallium oxide and diamond. Meanwhile, R&D into advanced applications, including gallium oxide-based RF devices and solar-blind UV warning systems, is also gaining momentum.
As the industry expands rapidly, the supply side is showing clear signs of structural divergence.
Conventional industrial-grade gallium oxide is readily available, whereas high-purity products intended for semiconductor and optoelectronic applications face much higher technical barriers to production.
The main technical challenges lie in three areas: precise control of crystal phases, thorough impurity removal, and batch-to-batch consistency.
Ultra-high-purity products with purity levels ranging from 99.999% to 99.9999% are particularly challenging to produce, and a significant supply gap remains for high-quality materials.
In the past, high-purity raw materials for certain advanced applications were sourced from overseas, leaving supply chains vulnerable to changes in the international environment and fluctuations in logistics lead times.
One often-overlooked fact is that gallium oxide with a purity below 99.99% cannot meet the requirements of semiconductor-grade applications. By contrast, ultra-high-purity products with purity levels of 99.999% or higher require extremely stringent control of metallic and anionic impurities. These impurity levels directly affect critical performance parameters of downstream devices, including breakdown voltage, leakage current, and luminous efficiency.
China‘s domestic supply chain urgently needs local manufacturers with independent synthesis capabilities that can provide gallium oxide products with consistent performance and customizable specifications.
Producing high-purity gallium oxide with stable crystal phases and controlled impurity levels requires highly sophisticated synthesis processes, purification technologies, crystal phase control, and end-to-end quality management. These requirements also represent some of the industry‘s most pressing supply-side challenges.
Guangxi Titan New Material Technology Co., Ltd. specializes in the R&D and production of high-purity fine inorganic chemicals and organometallic compounds, as well as the provision of customized services. It is one of China‘s leading companies in the custom synthesis of metal-based compounds.
The company has established R&D and industrial operations in Nanning, Guilin, Kunming, and Shanghai, as well as in Vietnam, the United States, and Brazil. It also maintains close industry-academia-research partnerships with universities such as Kunming University of Science and Technology, Guilin University of Technology, and Nanning Normal University. Together, these efforts have enabled the company to establish an integrated technical system spanning laboratory R&D, pilot-scale development, and large-scale production.
Drawing on its extensive process expertise in high-purity oxides, Guangxi Titan offers gallium oxide (Ga2O3) products in a range of specifications, with purity levels ranging from 99.99% to 99.9999%.
For applications such as power semiconductor materials, optoelectronic detection, luminescent materials, transparent conductive targets, and catalysis, Guangxi Titan can tailor crystal phase, particle size, and impurity specifications to meet customers‘ specific formulation requirements.
