255nm LED performance information

Intensity & Wavelength vs Temperature

0

100

200

300

400

500

600

700

-20 -10 0 10 20 30 40 50 60 70

Temperature C

Inte

nsity

, rel

ativ

e un

its

220

230

240

250

260

270

280

290

Cen

ter W

avel

engt

h, n

m

255nm LED performance information

Intensity & Wavelength vs. Input current

0

200

400

600

800

1000

1200

1400

1600

1800

2000

0 5 10 15 20 25

Current input, mA

Inte

nsity

, rel

ativ

e un

its

200

210

220

230

240

250

260

270

280

290

300

Cen

ter

wav

elen

gth,

nm

UVLED255 output vs current vs forward bias voltage

UVLED-255 Output vs Current vs Vf

3

3.5

4

4.5

5

5.5

6

6.5

7

7.5

8

0 2 4 6 8 10 12 14 16 18 20

Input Current

Volt Forward

0.0E+00

1.0E-05

2.0E-05

3.0E-05

4.0E-05

5.0E-05

6.0E-05

7.0E-05

8.0E-05

9.0E-05

Output (W)

Voltage_Diode_Meas (Volts)Energy (W)

This plot shows the Forward Voltage vs. Input Current. Also shows output as a function of forward Bias current. All this data is at Room Temperature operation

UVLED255, Wavelength and output vs Temperature

255 nm LED Output VS Wavelength @20ma (4/6/06 T.D.)

0

500

1000

1500

200 210 220 230 240 250 260 270 280 290 300

Wavelength

Out

put

25 deg C 13 deg C -13 deg C -25 deg C-72 deg C -90 deg C -108 deg C

center wavelength at 25 C

The output improved by 600% when the LED was cooled from room temperature to –108oC. In addition, there was a shift to deeper UV by over 5nm.

Beam Patterns UVLED255-Hemi at 0.5cm from surface of LED

UVLED255-Hemi at 2.0cm from surface of LED

UVLED255 at surface of LED

UVLED255 at 1.0cm from surface of LED

LED Angular distribution of light