High power infrared LED, also known as high-power infrared light-emitting diode, is a type of semiconductor light-emitting device that emits infrared light with high luminous intensity. In recent years, with the rapid development of technology and the increasing demand for infrared applications, high-power infrared LED has become an important research and development direction in the field of optoelectronics. This article will introduce the basic concepts, development history, application fields, and future prospects of high-power infrared LED.

Basic Concepts of High Power Infrared LED

High power infrared LED is a kind of semiconductor light-emitting device that emits infrared light with high luminous intensity. It is mainly composed of a p-n junction, which is formed by the diffusion or ion implantation of impurities into the semiconductor material. When the p-n junction is forward biased, electrons and holes are injected into the junction, and then recombine in the active layer, releasing energy in the form of infrared light. The luminous intensity of high-power infrared LED is much higher than that of general infrared LED, which can reach tens of milliwatts or even hundreds of milliwatts.

Development History of High Power Infrared LED

The development of high-power infrared LED can be traced back to the 1960s. At that time, the main application of infrared LED was in remote control and optical communication. With the continuous development of technology, the luminous intensity of infrared LED has been gradually improved, and its application fields have been expanded. In the 1990s, the development of high-power infrared LED reached a new peak, and its luminous intensity reached hundreds of milliwatts. In the 21st century, with the continuous optimization of material and structure, the luminous intensity of high-power infrared LED has reached the level of several watts.

Application Fields of High Power Infrared LED

High power infrared LED has a wide range of application fields, mainly including: 1. Remote control: High-power infrared LED is widely used in remote control of household appliances, such as TVs, air conditioners, and audio equipment. Its high luminous intensity ensures the stable transmission of remote control signals. 2. Security monitoring: High-power infrared LED can be used as a night vision device in security monitoring systems, providing clear images in low-light environments. 3. Automotive lighting: High-power infrared LED can be used as a car rear fog lamp, which has the advantages of high luminous intensity, long life, and energy saving. 4. Medical field: High-power infrared LED can be used in the field of medical diagnosis and treatment, such as endoscopy, optical coherence tomography, and laser surgery. 5. Industrial field: High-power infrared LED can be used in industrial applications, such as heat-sealing, welding, and non-contact measurement.

Material and Structure Optimization of High Power Infrared LED

To improve the performance of high-power infrared LED, material and structure optimization are the key factors. The following aspects are mainly involved: 1. Material optimization: The development of high-power infrared LED is closely related to the material. Currently, the main materials used in high-power infrared LED are gallium nitride (GaN), aluminum nitride (AlN), and zinc sulfide (ZnS). Among them, GaN-based materials have the advantages of high thermal conductivity, high breakdown voltage, and high luminous efficiency. 2. Structure optimization: The structure of high-power infrared LED is mainly optimized from the following aspects: improving the light extraction efficiency, reducing the internal quantum loss, and improving the thermal dissipation performance. The main methods include: adopting the epitaxial structure, using the micro-structured surface, and optimizing the heat dissipation structure.

Future Prospects of High Power Infrared LED

With the continuous development of technology and the expansion of application fields, high-power infrared LED has a bright future. The following aspects are worth looking forward to: 1. Continuous improvement of luminous intensity: With the optimization of material and structure, the luminous intensity of high-power infrared LED will continue to increase, which will further expand its application fields. 2. Widening application fields: As the performance of high-power infrared LED continues to improve, its application fields will continue to expand, such as in the field of 5G communication, intelligent transportation, and aerospace. 3. Green and energy-saving development: High-power infrared LED has the advantages of high luminous efficiency, low power consumption, and long life, which is in line with the development trend of green and energy-saving. In conclusion, high power infrared LED has a significant role in the field of optoelectronics. With the continuous optimization of material and structure, its performance will be further improved, and its application fields will be further expanded. In the future, high-power infrared LED will play a more important role in promoting the development of related industries.