SPECTRA OF LOW-POWERED SiC BLUE LEDS


This web page will be for nothing but spectra of 10mm, 8mm, 5mm, 3mm, and SMD LEDS (driven at 20mA to 60mA):

Ocean Optics USB2000 Spectrometer donated by P.L.
As of 10-10-07, I've been using a PC2000-ISA Spectrometer from Ocean Optics that I received several years ago, but that I didn't have a home for until now.
As of 03-08-08, I once again have the USB2000 spectrometer, enabling color spectra again.
As of 09-19-09, I no longer have the PC2000-ISA; it was sold to prevent an eviction.



SiC (SILICON CARBIDE) BLUE LEDs

Spectrographic plot
Spectrographic analysis of a 5mm SiC blue LED in a light blue tinted body.


Spectrographic plot
Spectrographic analysis of an unknown-type SiC (silicon carbide) 5mm blue LED in a water-clear transparent case; If=~2mA.


Spectrographic plot
Spectrographic analysis of an unknown-type SiC (silicon carbide) 5mm blue LED in a water-clear transparent case; If=~50mA.


Spectrographic plot
Spectrographic analysis of an unknown-type SiC (silicon carbide) 5mm blue LED in a water-clear transparent case.


Spectrographic plot
Spectrographic analysis of an unknown-type SiC (silicon carbide) 5mm blue LED in a diffused case.


Spectrographic plot
Spectrographic analysis of a Cree SiC blue LED from 1992; it comes in a blue tinted diffused case.
Newer spectrometer setting used.


Spectrographic plot
Spectrographic analysis of another unknown-type 5mm SiC blue LED.


Spectrographic plot
Spectrographic analysis of an unknown-type 5mm SiC blue LED.


Spectrographic plot
Spectrographic analysis of a vintage Cree SiC (silicon carbide) T1/2 axial lead blue LED.


Spectrographic plot
Spectrographic analysis of a vintage unknown-type (but possibly Cree) SiC (silicon carbide) 3mm blue LED.


Spectrographic plot
Spectrographic analysis of a vintage unknown-type (but possibly Cree) SiC (silicon carbide) 5mm blue LED.


Spectrographic plot
Spectrographic analysis of another unknown-type SiC (silicon carbide) blue LED.


Spectrographic plot
Spectrographic analysis of an unknown-type SiC (silicon carbide) blue LED.


Spectrographic plot
Spectrographic analysis of a Cree SiC blue LED from 1992; it comes in a blue tinted diffused case.


Spectrographic plot
Spectrographic analysis of a SiC (silicon carbide) blue LED in a blue tinted diffused case; probably from the mid-1990s.


Spectrographic plot
Spectrographic analysis of a 5mm SiC (silicon carbide) blue LED, circa. ~1995.
If (forward current) was ~150mA for this test so that I could get an acceptably high reading.


Spectrographic plot
Spectrographic analysis of a 5mm diffused SiC blue LED.


Spectrographic plot
Spectrographic analysis of a Cree 101CR SiC blue LED.













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WHITE 5500-6500K InGaN+phosphor 
ULTRAVIOLET 370-390nm GaN 
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BLUE Silicon Carbide
TURQUOISE 495-505nm InGaN
GREEN 525nm InGaN 
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