BLUE LED

Seminar on

Presented By

V.SUNEEL REDDYRoll.No:11711A04B0

E.C.E DEPARTMENT

NARAYANA ENGINEERING COLLEGE NELLORE

CONTENTS

o What is an LED?o What is an BLUE LED?o Dopping of GaNo Efficiencyo Advantages o Applicationso Future Prospects

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.

• 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?

DOPING OF GALLIUM NITRIDE:

• A difficult step in developing efficient BLUE LED’s was the growth and p- dopping alloys AlGaN, InGaN.

EFFICIENCY:

ADVANTAGES:

• Blue light can store four times more information than infrared light.• Low power consumption.• Energy Saving

DISADVANTAGES

• To make the diodes very difficult.• Expensive

APPLICATIONS:

•Mobile Phones, Tablets, Laptops, Computer monitors and T.V Screens.

ISAMU AKASAKI HIROSHI AMANO SHUJI NAKAMURA

NOBLE PRIZE WINNERS

FUTURE PROSPECTS:

THANK YOU