Panasonic BP-5917C40 - Sunceram II Features

Panasonic Solar Cells Handbook, Page 3 August 1998
THIN-FILM SOLAR CELLS (SUNCERAM II) - CONTINUED
1.3. Construction
Since screen printing is used for the entire film-forming
process, the Sunceram II cells with a large surface area
can be made relatively easily, while any number of cells
in any required shape can be connected in series or in
parallel on the glass substrate at the same time as the
films are formed. The figures below show two typical
examples of the construction of cells connected in
series. When the cells are used in calculators and other
applications involving relatively faint currents,
connection method (a) is mainly used; when they are
used in high-brightness conditions with high currents,
method (b) is used.
1.3.1. Construction of Sunceram II cells connected
in series
(a) Connection at lower edge of each cell
(b) Connection along entire length of cell sides
1.4 Sunceram II Features
1. High, wide-ranging spectral sensitivity
characteristics
The cells have wider spectral characteristics in various
wavelength regions than crystalline silicon and are more
sensitive over a wider wavelength region than
amorphous silicon.
Emission spectrum of light sources
Spectral sensitivity characteristics of solar cells
2. Excellent sunlight irradiation characteristics
Compared with amorphous silicon, Sunceram II operates
more stabile over longer periods of time when irradiated
by sunlight.
Wavelength (nm)
Relative sensitivity of light source
100
50
0
300 500 700 900 1100
Cool white
fluorescent light
Incandescent bulb
Sunlight
AMI.5)
Wavelength (nm)
Relative spectral sensitivity
100
50
0
300 500 700 900 1100
Amorphous
silicon
Sunceram II
Crystalline
silicon
N-type
semiconductor
P-type
semiconductor
Current
collector
( )
Electrode
(positive)
Electrodes (for series connection)
Electrode (negative)
( )
Glass
Electrode (positive)
( )
Current
collector
P-type
semiconductor
N-type
semiconductor
Glass
( )
Electrode (negative)
Electrodes (for series connection)
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0 30 60 90 120 150 180 210 240
Light source: Solar simulator
100mW
cm
2
Amorphous silicon
Sunceram II
(In-company comparison)
Time (hours)
Output variation rate