PAM-XIAMEN can offer 850nm and 940nm infrared LED wafer by MOCVD. 850nm and 940nm infrared LED refers to the infrared wavelength with the peak value of 850nm or 940nm, but there is also a small amount of light in the visible light area, so it can also see the weak red light. GaAs-based IR LED wafer structure is introduced as follows:
1. Infrared LED Wafer Structure
1.1 850-870nm LED Wafer Structure
Note：It is for 850nm-870nm, and there is no indium in the emission area.
1.2 850nm Infrared LED Wafer Structure
|N-Current spreading Layer||N-AIGaInP|
1.3 850nm IR LED Epitaxial Wafer Structure
1.4 940nm Infrared LED Epi Wafer
1.5 AlGaAs/GaAs Epi-wafers MOCVD
|Wave length||850-920 nm|
|Doping of р||>= 1х1018|
|Active layer||>= 0.2 um|
|n-layer||<= 10 um|
|Doping of n||>= 1х1017|
|Substrate||GaAs, thickness <= 400um|
|Optical power||>= 5 mW|
2. About Infrared LED
The infrared light emitting diode(IRLED) is made of a material with high infrared radiation efficiency (commonly used GaAs) to make a PN junction, and a forward bias is applied to inject current into the PN junction to excite infrared light. The spectral power distribution is center wavelength 830~950nm, half-peak bandwidth is about 40nm. Its biggest advantage is that it can be completely free of red storms. An infrared light-emitting diode generates light with a wavelength slightly longer than the wavelength that the human eye can see. These devices emit light in the near-infrared range, which means they produce light closer to the visible light spectrum than microwaves. Infrared LED lights work similarly to LED lights that produce visible light, although they usually have different power requirements.
3. Applications Infrared LED Wafer
The GaAs-based IR LED wafers are commonly used in electronics and security systems. For security systems of infrared LED wafer fabrication,although the infrared light exceeds the range of visible light of the human eye, the camera can detect infrared light below the visible spectrum, which means that infrared light can illuminate an area so that the camera can clearly see and continue to record the area.