Читать книгу Materials for Solar Energy Conversion - Группа авторов - Страница 49

One or more PV solar cell materials are deposited on the substrate, which is called amorphous silicon. Figure 2.3 shows amorphous silicon photovoltaic solar cell. Vapor depositing technology is used to deposit 1-micrometer silicon materials on substrate (glass or metal). Depositing temperature is upto 75°C for plastic material as substrate. One of major drawbacks is, when exposed to sunlight, degradation has been happened in their output power. Electric field strength is to be increased when thickness of material reduced [3, 26]. Unisolar is a company which inventing solar PV cells using silicon thin film. The three-layer system can be used to optimize absorbing sun light from solar spectrum.

Table 2.2 Second-generation PV cells.

Manufacturer	Country	Technology
Amysolar	France	Amorphous silicon
3sun	Italy	Amorphous silicon
Anwell Precision	Hong Kong	Amorphous silicon
EcoMedia	Italy	Cadmium sulfide/cadmium telluride
Dupont	United States of America	Copper indium gallium diselenide
Nexcis	France	Copper indium gallium diselenide
First Solar	United States of America	Copper indium gallium diselenide

Figure 2.3 Amorphous silicon PV cell.