▶find photoelectric effect
Heinrich R. Hertz
▶design solar cell experiment
Cell (Basic cell of the solar cell)
↓
Module (Form of assembling Cells)
↓
Array (Solar panel)
Hole moves toward
P type semiconductor
Electron moves toward
N type semiconductor
↓
Electrode formed
Current flows
↓
Solar cell generate
plastic film type solar cell
Prospect : Due to th
Strengths
No future expenditure in electricity
Environment-friendly
Weaknesses
High initial cost of solar panels
Low efficiency of solar energy,
compared to other sources
Opportunities
Technology development can
improve efficiency of solar energy
Threats
Preference for current resources of
electricity over solar energy
The emergence of
solar cell)로 구성된 모듈(module)과 축전지 및
전력변환장치로 구성됨
● 특징
수소에너지의 특성
● 수소는 무한정인 물 또는 유기물질을 원료로 하여 제조할 수 있으며, 사용 후 다시 물로 재순환 됨
● 가스나 액체로서 쉽게 수송할 수 있으며 고압가스, 액체수소, 금속수소화물 등의 다양
solar homes 를 방문하고 solar energy의 장점에 대해 배워갈 수 있도록 Colorado Tour of Solar Homes를 구성한다.
CRES는 CRES 2006 Strategic Plan 을 2006년 6월에 발표했는데, 이것은 기관의 발전은 물론 콜로라도 주의 재생에너지와 에너지 효율의 발전을 위한 목표에 대한 개요서이다. 이 계획의 실행방안의 세부적인 사
2. DSC와 Silicon solar cell의 비교
① 복사선의 입사각에 덜 민감하다.
그림 . 입사각의 함수로서 티타니아 태양전지의 표준 동작 효율(STA data)
법선 입사에서 효율을 100%라고 가정
② 넓은 온도범위에 걸쳐서 최적으로 동작할 수 있는 설계가 가능하다. 이와는 대조적으로 Silicon solar cell
solar energy resource: 300 sunny days per year equivalent to over 5,000 trillion kilowatts of solar energy in a year. Carbon emission reduction in terms of carbon credit will attract lots of investment in the renewable energy.
3. Marketing Strategy
The analysis of the industry is crucial. The analysis would be carried out with the use of Porter’s Five Forces Analysis and the SWOT Analys
WHAT IS A SOLAR CELL?
Devices that convert solar energy to electric energy.
WHAT IS PHOTO ELECTRIC EFFECT?
The photoelectric effect is a phenomenon in which electrons are emitted from matter as a consequence of their absorption of energy from electromagnetic radiation of very short wavelength, such as visible or ultraviolet light
Absorption and generation of exciton
Dissociation and
Converts sunlight directly into electricity
Non polluting
Long lasting sources of energy
No need of maintenance
In the long run, solar electricity is cheaper
Electrons of dye absorb solar energy
Electrons of dye are excited & Generate electron-hole pairs
Electrons transfer from dye to FTO via TiO2
1/2 I3- + e 3/2 I- at counter electrode
3/2 I- 1/2
Single junction structure
Poor efficiency(<30%)
Conversion rate ~ # of photon
Multi-layer structure
high efficiency(2times of 1st type)
Conversion rate ~ # of photon
Use photon energy
Very high(1hv → 2e)
Theoretical level
Dye electrons are excited by solar energy absorption
They are injected into the conduction band of TiO2
Get to counter-electrode (cathode) through the exter
shipbuilding yard. One is in Korea and the other is in China.
Number 4 on the ground is Factory of the STX Engine.
Number 6 and 9 shows they establish huge plant and produce solar energy and wind power generation.
Number 11 is crusie ship which is builded by STX Europe.
Then, you can know STX provides a global logistics service, also this company builds industrial infrastructure.