With the rapid development of technology, infrared (IR) LED has become an indispensable component in various fields, including medical, automotive, and consumer electronics. Among the various wavelengths of IR LED, 850nm IR LED has gained significant attention due to its unique advantages. This article aims to provide an in-depth introduction to 850nm IR LED, covering its basic principles, applications, and market trends.

Basic Principles of 850nm IR LED

850nm IR LED, as the name suggests, emits infrared light at a wavelength of 850nm. It is a type of semiconductor device that converts electrical energy into light energy. The working principle of 850nm IR LED is based on the semiconductor p-n junction. When the forward bias voltage is applied to the p-n junction, electrons and holes are injected into the depletion region. The recombination of electrons and holes in the depletion region generates light energy, which is emitted in the form of infrared light.

Compared with other wavelengths of IR LED, 850nm IR LED has the following advantages:

• Longer wavelength: 850nm IR LED has a longer wavelength than 940nm and 980nm IR LED, which can penetrate the human skin and tissue more easily, making it more suitable for medical and healthcare applications.
• Higher transmission: 850nm IR LED has higher transmission in the atmosphere, which can ensure better signal transmission in long-distance communication applications.
• Lower cost: The production cost of 850nm IR LED is relatively low, which is conducive to the promotion of its application in the market.

Applications of 850nm IR LED

850nm IR LED has a wide range of applications due to its unique advantages. The following are some of the main application fields:

Medical and Healthcare

In the field of medical and healthcare, 850nm IR LED can be used for non-invasive optical imaging, blood oxygen saturation monitoring, and tissue temperature measurement. The longer wavelength of 850nm IR LED allows it to penetrate the human skin and tissue more easily, making it suitable for real-time monitoring of physiological parameters. Additionally, 850nm IR LED can be used for photodynamic therapy, which is a non-invasive and minimally invasive treatment method for various diseases.

Automotive Industry

In the automotive industry, 850nm IR LED is widely used for automotive lighting, such as taillights, brake lights, and turn signals. Due to its higher transmission and lower cost, 850nm IR LED is an ideal choice for automotive lighting applications. Moreover, 850nm IR LED can also be used for automotive radar systems, which are used for detecting obstacles and vehicles in front of the vehicle.

Consumer Electronics

In consumer electronics, 850nm IR LED is used for various applications, such as remote control, infrared communication, and infrared sensors. Due to its longer wavelength and lower cost, 850nm IR LED is an ideal choice for these applications. For example, in the field of remote control, 850nm IR LED can be used to achieve a longer transmission distance and higher stability, which is beneficial to improve the user experience.

Market Trends of 850nm IR LED

With the continuous development of the global economy and the rapid expansion of the application fields of 850nm IR LED, the market demand for 850nm IR LED has been growing rapidly. According to market research reports, the global 850nm IR LED market is expected to maintain a high growth rate in the next few years. The following are some of the key trends in the 850nm IR LED market:

• Market expansion: The application fields of 850nm IR LED are expanding rapidly, and the market demand is increasing year by year.
• Technology innovation: The technology of 850nm IR LED is constantly improving, and the performance of products is constantly improving.
• Price competition: With the continuous improvement of production technology and scale, the price of 850nm IR LED is expected to continue to decline, which will promote the further expansion of the market.

In conclusion, 850nm IR LED has excellent performance and wide application prospects. With the continuous development of technology and market demand, the 850nm IR LED industry is expected to maintain a rapid growth momentum in the future.