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UV LED

UV LED Epitaxy 迡 ٸ ϴ 常 Ǵ uv ū ̴.
UV LED uv LED ȭ ϱ ؼ UV LED Ǵ uv ȿ UV LED Ĩ ̴. 2000 ߹ݱ ص 1WԷ´ 365nm UV 緮 20mW/W Ұ GaN Ĩ 2009 0.1-0.8% ſ 110mW/W ȿ UVĨ DZ⵵ Ѵ.
(׷ uv ȿ 100mW/W Ĩ ſ Ƿ Ĩ 1 2-3 ޷ ȸϹǷ Ĩ 鰳  UV LED ȭ⸦ 鿡 ؾ Ѵ.
10 X200mm uv LED ȭ ٸ , *ΰ 4.5mm Ĩ 88 ʿϸ, 1 300$ 300$X88=3100 Ĩ ҿǹǷ UV LED ȭ õ Ҽ ۿ . ó UV LED ȭ⸦ Ĩ ſ ̹Ƿ UV LED ȭ⵵ ʸ 1m 3 ȣ ۿ .)

1). UV LED ⺻
P, N ݵü Ʒ׸ ٿ ָ, P ݵü N ݵü  δ. ̿ʹ ݴ N ݵü ڴ P ݵü (conduction band)  δ. ڵ (valence band) ڸ() ڿ , (energy gap) شϴ ŭ ߻ϴµ,
· Ǹ LED ǰ, uv 뿪̸ UV LED ȴ.


2). LED Ϲ

- ǰ ȭ, ȭ : Ĩ 0.3-1mm ſ Ƿ ȭϱ .
- : 鿭 on-off Ī ð 0.15ε LED on-off Ī ð 10-9 -10-8ʷ ſ ª.
- : 50% پ ð 10-100 ð̴.
- ȿ : Up to 55% ܺξ ȿ ſ .
- : 15% Һ ʹ UV ´.
- Cold light : No Infrared radiation


3). UV LED ٽ
UV LED Ŀ Ͽ ϴ 常 , uv , غؾ ϴ ߿ junction ̴.

LED Է electrical power UV 0.1-8% ǰ, 70% ս, 20% ̻ heat ȯȴ. ̿ junction ߻Ǵ  ôİ ߿ϴ. junction ߻ ؾ Ĩ µ ְ, Ĩ µ 45 Ϸ Ǿ UV ϹǷ ϱ , 濭 ⱸ 谡 LED 迡 ߿ϴ.

Led Ǹ Ʒ ׸ó Ưȭ ִ.
Ĩ µ ϸ 尸 ۾ ִ. ̷ ij սǰ Ȱ overflow ̸ ȭ ݵüٴ InGaAlP LED ɰϿ junctionµ 80 Ǹ 50% ҵǴ ⵵ Ѵ.

Ĩ µ Ĩ Ű¡ ĥ Ӹ ƴ϶, uv ȿ ް Ʈ, Ų.
Ĩ µ sub mount , , ڿܼ ٰ Ű¡ 谡 ʿϴ.
Ĩ 濭 ġ LED Ĩ µ ʹ Ĩ ü Ȥ Ű¡ ȭϰ ȴ. ŷ ȭ ߱ ȿ Ͽ Ĩ ܼȭ ʷϰ ȴ. LED ū Ư¡ (٤) غ ʱ ؼ, Ĩ ܺη Ű ٽ̸, Ŀ Ȯ ſ ̰ ִ..

ϱ øĨ β p ݼ ̿ϰ Ǹ 긶Ʈ Ĩ Ǿ Ƿ ־ ͺ 20 15/W ȴ.
øĨ ȿ ΰ, Ư п ߱ڴ Ŀ uv led ڿ ǰ ִ.

4) ȿ (optical extraction efficiency)
LED ξȿ ܺξȿ տ ؼ Ǵµ, LED Ȯ뿡 䱸 Ű ؼ LED ü ξȿ Ҿ ܺξȿ ʼ 䱸 ǰ ִ ̴. 2000 LED ܺξȿ Ű μ ̾ ǥ鿡 · ʹ(Patterning)ϴ İ
ݻǴ ̾ ̿Ͽ ȿ(Optical Extraction Efficiency) ȹ Ͽ.
2002⿡ Nichia 20%, ִ 40% ̻ ȿ ȿ Ͽ