Phosphor (Energy Converter)
Inorganic phosphor materials
“Classical” inorganic phosphors usually consist of a host lattice with activator ions doped into it in small concentrations, typically a few mole percent or less.
Host lattice & Activator ion
1st type : weak interaction (Ln3+)
2nd type: strong interaction ( Mn2+, Eu2+, Ce3+, Pb2+,Sb3+, Ce3+, MoO42-, NbO43-)
Activator (+ Sensit
본문내용
(1) 무적 V-1 공식
기본적으로 접속사가 필요한 문장에는 동사의 개수보다 반드시 1개 적게 접속사가 존재해야
한다. 즉, 예를 들면 동사가 5개면 전치사는 당연히 4개 여야 한다. 이 공식은 Part A를 푸는
데 두루 쓰이는 공식으로써 앞으로 V-1 이라 쓸것이다.
예문) __________ often considered both
본문내용
+++ Escape Sequence
2B1Q 2 Binary 1 Quarte
ary
4B3T 4 Binary 3 Te
ary
4GL 4th Generation Language, 제4 세대 언어
4b/5b 4 binary 5 binary
A-b-S Analysis by Synthesis, 합성에 의한 분석
A/D Analog-to-Digital (converter)
A20 Address line 20
AA Auto Answer mode
AAA American Arbitration Association, 미국중재협회
AAL ATM Application Layer, ATM 응용 계층, A
Abstract
Amorphous silicon solar cell has advantages of low processing cost and higher light absorption coefficient over crystalline silicon solar cell. However, short lifetime and instability against the light are the major drawbacks. This report aims to investigate the ways for achieving longer lifetime and robustness of amorphous silicon solar cell against the light. The potential solution of
결정질 실리콘 태양전지
기술 개요
현재의 태양전지의 기본 형태를 이루는 최초의 실리콘 태양전지는 1954년에 개발되어 4.5%의 변환 효율을 얻었고, 몇 달 후 에 6%를 달성하였다. 1999년도의 24.7%가 발표되기까지 45년의 세월이 걸렸다. 중요한 하나의 기술이 개발되면 획기적으로 효율이 증가하고 또 다
singly restricted regulations or complete prohibition on the use of a number of chemical fumigants for insect and microbial control in food, irradiation is an effective alternative to protect food against insect damage and as a quarantine treatment of fresh produce.
The FAO has estimated that worldwide about 25% of all food production is lost to insects, bacteria and rodents after harvesting. Th
High-temperature decomposition
High-temperature splitting of water occurs at about 3000 °C. At this temperature, 10% of the water is decomposed and the remaining 90% can be recycled. To reduce the temperature, other processes for high temperature splitting of water have been suggested:
▸Thermo-chemical cycles.
▸Hybrid systems coupling thermal decomposition and electrolytic
3. Experiment Method
A measurement method of sample of powder form is an x-ray diffractometor(Fig. 9).
Fig. 9. An x-ray diffractometer.
3.1. Making of Sample Powder
A Sample is made a powder form. A diameter of powder has good reproducibility as smaller. But generally 10~35μm is a suitable size of sample. We must caution a deterioration by air, gas, humidity and pouri
■ PDP의 정의 및 특징
1. PDP의 정의
플라즈마 디스플레이는 기체 방전시에 생기는 플라즈마로부터 빛을 문자 그래픽을 소자이다. 플라즈마 디스플레이는 기체 방전 현상을 이용한 표시소자이므로 기체 방전 (GasDischarge Display 소자라고도 부른다.
PDP는 현재 활발히 연구되고 있는 LCD(Liquid Crystal