Amorphous Si Solar cells
Amorphous Photosensors
About a Solar Cell:
- Output and Light Sources
Output and Light Sources
The output of solar cells differ depending on the categories of light sources to which they are exposed.
This is because photoelectric conversion efficiency changes with respect to the wavelength and Intensity of the light.
Categories of light sources
The general light source for solar ceIIs is sunlight out of doors, and fluorescent or incandescent light Indoors. The following outline describes the various categories:
| Light source | |||
|---|---|---|---|
| Sunlight | Artificial light | ||
| AM-0 | Outer space (solar light at global average revolution orbit) | Incandescent light | General-use incandescent light, halogen lamp |
| AM-1 | When the sun is directly overhead (0m above sea level at the equator, vertical sunlight at meridian passage) | Fluorescent light | Daylight, white, and warm white colors |
| AM-1.5 | When zenithal angle(Sunlight angle 0° when sun is directly overhead) is 48° | Electric discharge lamp | Mercury-vapor lamp, Natrium lamp, xenon lamp |
| Other | AM-2 (when zenithal angle is 60°), etc. | ||
Brightness
When sunlight and fluorescent light are compared in terms of brightness, the results are shown as follows:
| Sunlight [Light Source] | Fluorescent light | ||
|---|---|---|---|
| Condition | Illuminance(Lux) | Condition | Illuminance(Lux) |
| Direct sun | 100,000 to 120,000 | Design stand(partially illuminated) | Around 1,000 |
| Bright | 50,000 to 100,000 | Offices/meeting room | 300 to 600 |
| Cloudy | 10,000 to 50,000 | Restaurants/coffee shops | Below 200 |
| Rain | 5,000 to 20,000 | ||
Radiant spectrum of light source and spectral sensitivity of solar cells
