IR LED 940 nm, or infrared LED with a peak emission wavelength of 940 nanometers, has become a crucial component in various industries due to its unique properties and wide range of applications. This article aims to provide an in-depth introduction to the 940 nm IR LED industry, covering its development history, technology, applications, and market trends.

Development History of IR LED 940 nm

The concept of infrared LED dates back to the early 20th century. However, it was not until the 1960s that the first infrared LED with a peak emission wavelength of 940 nm was developed. Since then, the technology has undergone continuous innovation and development, leading to the production of high-quality and high-performance 940 nm IR LEDs. In the early stage of development, 940 nm IR LEDs were primarily used in industrial applications, such as infrared sensors and remote controls. With the advancement of technology, the applications of 940 nm IR LEDs have been expanded to consumer electronics, medical devices, and automotive industries.

Technology of IR LED 940 nm

The 940 nm IR LED technology is based on the principle of semiconductor materials. When a forward bias is applied to the semiconductor material, electrons and holes are generated, and when they recombine, photons with a wavelength of 940 nm are emitted. The key to the high performance of 940 nm IR LEDs lies in the quality of the semiconductor material and the structure of the LED. High-purity semiconductor materials with high carrier mobility and low defect density are required to ensure the high brightness and long lifespan of the LED. Moreover, the structure of the LED, such as the p-n junction, epitaxial layer, and encapsulation material, plays a crucial role in determining the performance of the LED. In recent years, the development of epitaxial technology has significantly improved the performance of 940 nm IR LEDs. The epitaxial layer structure, including the quantum well and barrier layer, can effectively confine the electrons and holes, resulting in a higher internal quantum efficiency and reduced energy loss.

Applications of IR LED 940 nm

The 940 nm IR LED has a wide range of applications due to its excellent performance and unique properties. The following are some of the major applications: 1. Infrared Sensors: 940 nm IR LEDs are widely used in infrared sensors, such as proximity sensors, temperature sensors, and gesture recognition sensors. Their high sensitivity and long detection range make them ideal for various applications. 2. Remote Controls: 940 nm IR LEDs are commonly used in remote controls for consumer electronics, such as televisions, air conditioners, and audio equipment. They offer a higher transmission distance and lower interference compared to traditional 38 kHz IR LEDs. 3. Medical Devices: 940 nm IR LEDs are used in medical devices, such as endoscopes, blood glucose meters, and phototherapy equipment. Their high brightness and long lifespan ensure accurate and reliable measurements. 4. Automotive Industry: 940 nm IR LEDs are used in automotive applications, such as reverse parking sensors, automotive lighting, and driver assistance systems. They provide better performance and energy efficiency compared to traditional halogen lamps. 5. Consumer Electronics: 940 nm IR LEDs are used in various consumer electronics, such as gaming devices, remote-controlled toys, and security systems. Their compact size and low power consumption make them ideal for these applications.

Market Trends of IR LED 940 nm

The 940 nm IR LED market has been growing rapidly in recent years, driven by the increasing demand for high-performance and energy-efficient devices. The following are some of the key market trends: 1. Increasing Demand in Consumer Electronics: The rapid development of consumer electronics, such as smartphones, tablets, and smart home devices, has led to a significant increase in the demand for 940 nm IR LEDs. 2. Expansion of Automotive Industry: The growing automotive industry has also contributed to the demand for 940 nm IR LEDs, particularly for applications such as automotive lighting and driver assistance systems. 3. Advancements in Technology: Continuous technological innovation has led to the development of high-quality and high-performance 940 nm IR LEDs, further driving the market growth. 4. Competition and Price Pressure: The increasing number of manufacturers and suppliers in the 940 nm IR LED market has led to intense competition and price pressure. However, this has also encouraged manufacturers to focus on improving product quality and reducing costs. In conclusion, the 940 nm IR LED industry has experienced significant growth and development in recent years. With its unique properties and wide range of applications, the 940 nm IR LED is expected to continue playing a crucial role in various industries in the future. As technology continues to advance, we can anticipate even more innovative applications and market opportunities for 940 nm IR LEDs.