solar energy utilization(태양에너지의 이용)- Solar Electricity(태양전기), Solar Fuel(태양 연료)

소개글

태양에너지의 이용사례를 크게 Solar Electricity와 Solar Fuel로 나누어 조사해 보았습니다.
레퍼런스도 자료 후반부에 제시되어 있으니 참고하세요^^

목차

PART I. Solar Electricity
1. Photovoltaic (PV) cells
2. Types of PV cell
2- 1. Inorganic cells
2- 2. Organic cells
2- 3. Photoelectrochemical (PEC) cells
① Electrochemical photovoltaic [EPV] cell
② Dye- sensitized Nanocrystalline Solar Cell
3. Current status
4. Basic Science Challenges and Research Needs in Solar Electricity
4- 1. Inorganic Photovoltaics
4- 2. Organic Photovoltaics
4- 3. Photoelectrochemistry

PART II. Solar Fuel
1. Current status
1- 1. Biomass-derived Fuels
1- 2. Natural Photosynthetic Systems
① Bacterial Photosynthesis
② Photosystem I and II in Green Plants and Cyanobacteria
1- 3. Bio-inspired Approaches to Photochemical Energy Conversion
① Efficient Photo-initiated Charge Separation and Storage
② Integrating Artificial Photosynthetic Functions
1- 4. Photocatalysis and Photodriven Reactions
① Homogeneous Photocatalytic CO2 Reduction
② Homogeneous Photocatalytic Water Oxidation
③ Heterogeneous Semiconductor-based Photocatalysis
2. Basic Science Challenges and Research Needs
2- 1. Biomass-derived Fuels
2- 2. Natural Photosynthetic Systems
2- 3. Bio-inspired Approaches to Photochemical Energy Conversion
2- 4. Photocatalysis and Photodriven Reactions

본문내용

PART I. Solar Electrictity
Solar power can be converted directly into electrical power in photovoltaic (PV) cells, commonly called solar cells. The sun has a surface temperature of about 6,000°C, and its hot gases at this temperature emit light that has a spectrum ranging from the ultraviolet, through the visible, into the infrared.

1. Photovoltaic cells
• generally consist of a light absorber that will only absorb solar photons above a certain minimum photon energy. (“energy gap” or “band gap” (Eg))
• In inorganic semiconductor materials (ex. Si), e- have energies that fall within certain energy ranges, called bands.
• The energy ranges, or bands, have energy gaps between them.
- The valence band : band containing electrons with the highest energies
- The conduction band : band containing lowest electron energy

When photons are absorbed, they transfer their energy to electrons and promote these electrons to higher energy states. When photons transfer electrons across the band gap, they create negative charges in the conduction band and leave behind positive charges(called holes, h+) in the valence band. Thus, absorbed photons in semiconductors create pairs of negative electrons and positive holes. The electrons and holes formed upon absorption of light separate and move to opposite sides of the cell structure, where they are collected and pass through wires connected to the cell to produce a current and a voltage — thus generating electrical power.

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