) We use the following materials property maps to determine appropriate combinations of ctive for LEDs. layer/cladding/substrate Energy gap (CV) 24 22 20 1.8 1.6 12 1.9 0.8 ast 04 O Energy Gap and Lattice Constants a) GaP b) AlGaAs J InD Gas (D) Indhand ge Direct hand (D) . 0.54 0.55 0.56 0.37 GOD AD 0.50 0.61 Lattice constant (nm) 10.477 0317 0.563 -0.630 you -0.775 0.85 1053 -120 JS (D) 1.550 -2067 3.100 16.200 0.65 Wavelength (microns) 4a) Assume that you want to create a red LED with an output wavelength of 670nm. Which o following materials would make an appropriate active layer?
) We use the following materials property maps to determine appropriate combinations of ctive for LEDs. layer/cladding/substrate Energy gap (CV) 24 22 20 1.8 1.6 12 1.9 0.8 ast 04 O Energy Gap and Lattice Constants a) GaP b) AlGaAs J InD Gas (D) Indhand ge Direct hand (D) . 0.54 0.55 0.56 0.37 GOD AD 0.50 0.61 Lattice constant (nm) 10.477 0317 0.563 -0.630 you -0.775 0.85 1053 -120 JS (D) 1.550 -2067 3.100 16.200 0.65 Wavelength (microns) 4a) Assume that you want to create a red LED with an output wavelength of 670nm. Which o following materials would make an appropriate active layer?
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Transcribed Image Text:4) We use the following materials property maps to determine appropriate combinations of
active layer/cladding/substrate for LEDs.
26
24
22
20
1.8---
1.6
1.2
1.0
0.8
0.6
0.2
AIP
0
O
a) GaP
b) AlGaAs
c) InP
d) GalnAs
Energy Gap and Lattice Constants
ALA
...
Care (0)
0
L
L
0.54 0.55 0.56 0.57
IPD)
Indirect hand p
Direct hand gap (D)
Alsh
0.
Gash()
InAs (D)
0.59 0.60
Lattice constant (nm)
L
0.61 0.62 0.63
10.477
-0.517
-0.563
-0.620
-0.689
-0.775
0.885
1.033
-1.24
1.550
-2.067
-1.100
6.200
JS (D)
0.64 0.65
4a) Assume that you want to create a red LED with an output wavelength of 670nm. Which of the
following materials would make an appropriate active layer?
Wavelength (microns)
4b) Which of the following would make an appropriate cladding layer?
a) Ge
b) GaInP
c) GalnSb
d) AlGaSb
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