Infrared transmitter diode, also known as infrared LED (Light Emitting Diode), is a semiconductor device that emits infrared light when an electric current passes through it. As a key component in the infrared communication field, it has been widely used in various applications such as remote control, infrared remote sensing, and infrared communication. This article will introduce the industry of infrared transmitter diode, including its working principle, types, applications, and market trends.

Working Principle of Infrared Transmitter Diode

The infrared transmitter diode is a semiconductor device with a PN junction. When a forward voltage is applied to the diode, electrons and holes are injected into the depletion region, which generates a recombination process. During this process, a certain amount of infrared light is emitted due to the energy difference between the valence band and the conduction band. The wavelength of the emitted light is determined by the energy gap of the semiconductor material. The working principle of the infrared transmitter diode can be described as follows: 1. Forward bias: When the forward voltage is applied to the diode, the electrons and holes are injected into the depletion region, causing the recombination process. 2. Recombination process: During the recombination process, the energy difference between the valence band and the conduction band is released in the form of infrared light. 3. Infrared light emission: The emitted infrared light has a certain wavelength, which is determined by the energy gap of the semiconductor material.

Types of Infrared Transmitter Diode

Infrared transmitter diodes can be divided into several types according to their materials, wavelengths, and applications. The following are some common types: 1. Infrared LED: The most common type of infrared transmitter diode, with a typical wavelength range of 780nm to 950nm. 2. Infrared laser diode: A high-power infrared transmitter diode with a typical wavelength range of 850nm to 950nm. 3. Infrared photodiode: A type of infrared receiver diode, which can convert infrared light into electrical signals. 4. Infrared photoelectric sensor: A combination of infrared transmitter diode and receiver diode, used for detecting the presence or absence of objects.

Applications of Infrared Transmitter Diode

Infrared transmitter diodes have a wide range of applications in various fields. The following are some typical applications: 1. Remote control: Infrared transmitter diodes are widely used in remote controls for TVs, air conditioners, and other household appliances. 2. Infrared communication: Infrared transmitter diodes are used in infrared communication systems for data transmission between devices. 3. Infrared remote sensing: Infrared transmitter diodes are used in infrared remote sensing systems for detecting and measuring the temperature and humidity of objects. 4. Infrared imaging: Infrared transmitter diodes are used in infrared imaging systems for night vision and thermal imaging. 5. Infrared detection: Infrared transmitter diodes are used in infrared detection systems for detecting the presence of objects or substances.

Market Trends of Infrared Transmitter Diode

The market for infrared transmitter diodes has been growing steadily in recent years, driven by the rapid development of infrared technology. The following are some market trends: 1. Miniaturization and high integration: In order to meet the needs of various applications, the size and power consumption of infrared transmitter diodes are constantly being reduced, and high integration is achieved. 2. High brightness and long life: The brightness and lifespan of infrared transmitter diodes are constantly improving, which makes them more suitable for high-end applications. 3. Green and environmental protection: With the increasing attention to environmental protection, the development of green and environmentally friendly infrared transmitter diodes is becoming more and more important. 4. Market competition: The market competition in the infrared transmitter diode industry is increasingly fierce, with a large number of manufacturers entering the market. In conclusion, infrared transmitter diodes have become an indispensable component in the infrared communication field. With the continuous development of infrared technology, the applications of infrared transmitter diodes will be further expanded, and the market demand will continue to grow.