blue led
TRANSCRIPT
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BLUE LED
Seminar on
Presented By
V.SUNEEL REDDYRoll.No:11711A04B0
E.C.E DEPARTMENT
NARAYANA ENGINEERING COLLEGE NELLORE
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CONTENTS
o What is an LED?o What is an BLUE LED?o Dopping of GaNo Efficiencyo Advantages o Applicationso Future Prospects
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What is an LED?
LED is abbreviated as Light Emitting Diode. When Positive and Negative charges are to be recombine in active layer there should be emit light. Depending upon the materials used in active layer the colour and wavelength will be changed.
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• Here Diode produces light by combining Positive and negative charges inside GALLIUM NITRIDE(GaN) crystal. We get resulting photons in the form of BLUE in colour.
What is an BLUE LED?
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DOPING OF GALLIUM NITRIDE:
• A difficult step in developing efficient BLUE LED’s was the growth and p- dopping alloys AlGaN, InGaN.
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EFFICIENCY:
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ADVANTAGES:
• Blue light can store four times more information than infrared light.• Low power consumption.• Energy Saving
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DISADVANTAGES
• To make the diodes very difficult.• Expensive
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APPLICATIONS:
•Mobile Phones, Tablets, Laptops, Computer monitors and T.V Screens.
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ISAMU AKASAKI HIROSHI AMANO SHUJI NAKAMURA
NOBLE PRIZE WINNERS
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FUTURE PROSPECTS:
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THANK YOU