photovoltaic effect)에 의해 起電力(기전력)이 발생하여 외부에 접속된 負荷(부하)에 전류가 흐르게 된다. 이러한 태양 전지는 필요한 단위 용량으로 直(직)·竝列(병렬) 연결하여 기후에 견디고 단단한 재료와 구조의 만들어진 태양전지 모듈(solar cell module)로 상품화 된다.
Ⅱ. 태양전지(Solar Battery)
1. 원
Organic solar cell
a photovoltaic cell that uses organic electronics like conductive organic polymers or small organic molecules for light absorption and charge transport
Basic principle of solar cell
When light is illuminated at cell, the photons are absorbed in the organic layers.
The excitons diffuse to interface between donor and acceptor.
The excitons are separated by electron
What is Bioenergy?
Bioenergy is renewable energy made available from materials derived from biological sources. Biomass is any organic material which has stored sunlight in the form of chemical energy. As a fuel it may include wood, wood waste, straw, manure, sugarcane, and many other byproducts from a variety of agricultural processes.
So, Why do we produce Bioenergy?
One reason governments
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
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