The most common form of solar cells are based on the photovoltaic (PV) effect
Two layer semi-conductor device produces a photovoltage or potential difference between the layers
No fuel cost or fuel supply problem
No pollution
High reliability
Small amount of power required
Depend on place and climate
Large scale:
Ocean navigation aid
Telecommunication system
Remote moni
▶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
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 external circuit
: Redox regeneration at the counter-electrode (reduction)
: Dye regeneration reaction (oxidation)
Potential used for external work:
Ⅰ. 태양광 발전이란?
태양광발전은 깨끗하고 무한한 태양에너지를 직접 전기에너지로 변환시키는 기술이다.
기본 원리는 반도체 pn 접합으로 구성된 태양전지(solar cell)에 태양광이 照射(조사)되면 光(광)에너지에 의한 전자-양공 쌍이 생겨나고, 전자와 양공이 이동하여 n층과 p층을 가로질러 전류