With the rapid development of optoelectronics technology, 850nm LED has become a hot topic in the industry. As a new type of semiconductor light-emitting diode, 850nm LED has unique advantages and wide application prospects. This article will introduce the basic principles, production process, application fields, and market prospects of 850nm LED.

Basic Principles of 850nm LED

850nm LED is a semiconductor light-emitting diode with a peak emission wavelength of 850nm. It is mainly composed of gallium arsenide (GaAs), gallium nitride (GaN), and other III-V compound semiconductors. The basic principle of 850nm LED is that when the forward bias voltage is applied to the p-n junction of the semiconductor material, electrons and holes are recombined, and the energy released during the recombination is emitted as light. The light emission wavelength is determined by the energy band gap of the semiconductor material. The energy band gap of GaAs is about 1.42eV, and the energy band gap of GaN is about 3.4eV. By adjusting the composition and structure of the semiconductor material, the emission wavelength of the LED can be tuned to 850nm.

Production Process of 850nm LED

The production process of 850nm LED is similar to that of other types of LEDs. The main process includes material preparation, epitaxial growth, wafer fabrication, and packaging. The specific steps are as follows:

1. Material preparation: High-purity gallium, arsenic, and nitrogen are used as raw materials to prepare high-purity semiconductor materials through chemical vapor deposition (CVD) or molecular beam epitaxy (MBE) technology.

2. Epitaxial growth: The prepared semiconductor materials are used as substrates, and epitaxial films with a certain thickness and structure are grown on the substrates through CVD or MBE technology.

3. Wafer fabrication: The epitaxial films are etched, doped, and patterned to form LED chips through photolithography, etching, and doping processes.

4. Packaging: The LED chips are mounted on the package substrate, and the electrical connection and light extraction are realized through wire bonding, wire bonding, and encapsulation processes.

Application Fields of 850nm LED

850nm LED has excellent performance and wide application prospects. The main application fields include:

1. Optical communication: 850nm LED is widely used in long-distance optical communication, such as 10G, 40G, and 100G Ethernet systems. Its advantages are low cost, high efficiency, and long transmission distance.

2. Medical imaging: 850nm LED can be used as a light source for medical imaging equipment, such as endoscopes and optical coherence tomography (OCT). Its advantages are deep tissue penetration and non-ionizing radiation.

3. Photoelectric detection: 850nm LED can be used as a light source for photoelectric detection devices, such as photodiodes and photoresistors. Its advantages are high sensitivity and low noise.

4. Security monitoring: 850nm LED can be used as a light source for security monitoring devices, such as infrared cameras and thermal imaging cameras. Its advantages are long distance and low power consumption.

Market Prospects of 850nm LED

The market prospects of 850nm LED are very promising. With the continuous development of optoelectronics technology and the increasing demand for high-speed, high-quality, and low-cost optical communication, the market demand for 850nm LED will continue to grow. In addition, the application fields of 850nm LED are expanding, and its market prospects will be further improved. The following factors will promote the development of the 850nm LED market:

1. Technological innovation: The continuous improvement of epitaxial growth technology, material preparation technology, and packaging technology will further improve the performance and cost of 850nm LED.

2. Market demand: The increasing demand for high-speed, high-quality, and low-cost optical communication will drive the market demand for 850nm LED.

3. Application expansion: The continuous expansion of application fields will further promote the development of the 850nm LED market.

In conclusion, 850nm LED has excellent performance and wide application prospects. With the continuous development of optoelectronics technology and the increasing demand for high-speed, high-quality, and low-cost optical communication, the market prospects of 850nm LED will be more promising. As a new type of semiconductor light-emitting diode, 850nm LED will play an important role in the development of optoelectronics industry.