八月柳树_新浪博客

Solar cells directly convert light energy from the sun into electrical energy and are an increasingly important source of non-fossil-fuel energy. Jaejung Ko at Korea University and co-workers¹ now describe a new type of organic dye-sensitized solar cell (DSSC) that offers improved efficiency through encapsulation of the dye.

In a typical solar cell, irradiation excites electrons, causing charge separation. The electrons are transferred into an electron-deficient ‘capture layer’ and ultimately to electrodes. The efficiency of the solar cell is dependent on how easily these charges can be transferred to the electrodes to produce an electric current. In traditional solar cells, both the source of electrons and the electron capture material are provided by a semiconductor such as silicon.

DSSCs separate these two functions: the electrons are provided by a photosensitive dye molecule and the electron capture material is a nanocrystalline metal oxide such

点击此处查看全文

阅读|评论|收藏|打印|举报

Basic electronic knowledge: the principle of solar(2009-10-30 10:03)

标签：杂谈

分类：太阳能发电

Solar radiation in the semiconductor pn junction, the formation of new hole - electron pairs in the pn junction under the action of the electric field, p the hole flow from the n zone area, the electronic flow of n from the p-zone, connected to the circuit after the formation of current. This is the photovoltaic solar toshiba laptop battery works.

1, solar energy generation, solar power in two ways, one is light - heat - electricity conversion mode, and the other is light - electric direct conversion approach.

(1) Light - heat - electricity conversion mode through the use of solar radiation generated by thermal power generation, usually from the solar collector to the heat absorbed by refrigerant into steam, and then drive steam turbine power generation. Before a process is light - thermal conversion process; after a process of heat -

点击此处查看全文

阅读|评论|收藏|打印|举报

Sharp solar cell sets Conversion Efficiency record(2009-10-30 09:56)

标签：杂谈

分类：太阳能发电

The kids at Sharp have a long history of solar power development and research -- something which is evident in the solar cells they've attached to everything from televisions to cellphones. Always moving onward and upwards, the company is now announcing that it's achieved a title-holding 35.8 percent cell conversion efficiency through the use of a triple-junction compound cell. Mainly used on satellites, the triple-junction cell uses three photo-absorption layers and materials (such as indium gallium arsenide) to boost efficiency. This is all good news indeed for both people anticipating better solar devices and fans of solar research in general -- and great news for the people that make those 18 foot tall

点击此处查看全文

阅读|评论|收藏|打印|举报

Nanopatterns Improve Thin-Film Solar Cells(2009-10-30 09:25)

标签：文化

分类：太阳能发电

Nanopatterns Improve Thin-Film Solar Cells

Thin-film silicon solar cells are more efficient with tiny holes in the back electrical contact.

Any given solar-cell technology has drawbacks and advantages. Thin-film solar cells, for instance, require less material than traditional solar cells, and are therefore cheaper, lighter, and flexible. And if those thin films are made with amorphous silicon, the cost is further reduced. The problem, however, is that thin-film solar cells made of amorphous silicon tend to have extremely low efficiencies compared to thicker, crystalline silicon photovoltaics.