What is the material that makes this led?
many user(inquiring mind) think about this all the time. What is the material that makes this led?
However that is also very important for led manufacturer. Because The use of the correct materials was crucial.
This article lists some commonly used the material of led as follows:
| Light-Emitting Layer |
Substrate | Production Method |
Light- Em itting Color |
Light- Emitting Wavelength (nm) |
External Quantum Efficiency Max.(%) |
Visual Sensitivit y Efficiency (lm/W) |
Axial Photometric 05mm Lamp (mcd) |
| GaP (Zn, O) Ga0.65Al0.35As Ga0.65Al0.3 5As GaAs0.6P0.4 GaAs0.45P0.55(N) GaAs0.35P0.65(N) |
GaP GaAs GaAlAs GaAs GaP GaP |
Liquid phase epitaxy Liquid phase epitaxy (SH) Liquid phase epitaxy (DH) Vapor phase epitaxy+diffusion Vapor phase epitaxy+diffusion Vapor phase epitaxy+diffusion |
Red Red Red Red Red Red/Orange |
700 660 660 660 650 630 |
2 7 21 0.15 0.5 0.65< /td> |
1 2.1 12 0.07 0.35 1.2 |
30 500 500020 100 300 |
| GaAs0.25P0.75(N) GaAs0.15P0.85(N) GaAs0.1P0.9(N) |
GaP GaP GaP |
Vapor phase epitaxy+diffusion Vapor phase epitaxy+diffusion Vapor phase epitaxy+diffusion |
Amber Yellow Yellow |
610 590 583 |
0.6< br>0.25 0.2 |
2 1.1 1.1 |
300 200 200 |
| GaP(N) GaP(N) GaP |
GaP GaP GaP |
Liquid phase epitaxy Liquid phase epitaxy Liquid phase epitaxy |
Yellow Yellow/Green Pure Green |
570 560 555 |
0.7 0.3 0.2 |
4.3 1.6 1.36 |
400 250 200 |
| GaN SiC ZnSe* ZnS* |
a-Al2O3 SiC ZnSe ZnS |
Liquid phase epitaxy (MIS) Liquid phase epitaxy Liquid phase epitaxy+diffusion MOCVD (MIS) |
Blue Blue Blue Blue |
430 480 480 460 |
0.1 0.04 0.03 0.01 |
0.14 0.04 — —< /td> |
10(10mA) 12 2(2mA) 2(10mA) |