CTJ Photovoltaic Cell – 5.5mm x 5.5mm

CTJ Photovoltaic Cell – 5.5mm x 5.5mm
Triple-Junction Solar Cell for Terrestrial Applications
Cell Optimized for 1000X Concentration
SOLAR POWER
DATASHEET | SEPTEMBER 2012
EMCORE’s Concentrating Triple-Junction (CTJ) solar cells with n-on-p polarity are
built on germanium substrates and incorporate a proprietary antireflective coating
that provides low reflectance over a wavelength range of 0.3 to 1.8µm. These
high-efficiency solar cells are optimized for terrestrial applications under
concentrated incident illumination and high current densities.
Features and Characteristics
Series interconnected triple-junction solar cells monolithically integrated on
germanium
Photovoltaic absorber materials and bandgap energies are 1.86eV InGaP,
1.40eV InGaAs, and 0.67eV Ge
Typical Current-Voltage
Parameters at 1000 kW/m2, 25°C
Optimized for operation at 1000 suns and 25°C under ASTM G173-03 direct
reference spectrum. Custom design is also available for variables such as cell
size, operating intensity, spectrum, and temperature
Weld or solder enabled front and back contact metallization terminated in
silver/gold alloy
Parameter
Value at 25°C,
100 W/cm2
Efficiency (%)
39
All cells are flash tested at concentration at 25°C
Isc (Amps)
4.4
A variety of shipping options are available, including waffle packs, tape and
reel, or processed wafers
Imp (Amps)
4.3
150 MW/yr manufacturing capacity
Voc (Volts)
3.2
Vmp (Volts)
2.8
FF (%)
85
Efficiency vs. Concentration
Characteristics
Nominal Temperature Coefficients at 50 W/cm2
Parameter
Absolute, 10°C to 100°C Range
Relative, at 25°C
Efficiency
-0.04
absolute %/°C
-1080
PPM/°C
Vmp
-4.5
milliVolts/°C
-1610
PPM/°C
2
Jmp
4.7
milliamps/cm /°C
570
PPM/°C
[email protected]
7.7
X10-5 Amps/Watt/°C
570
PPM/°C
Part No. 620242
| REV 2012.09
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
CTJ Photovoltaic Cell – 5.5mm x 5.5mm
Triple-Junction Solar Cell for Terrestrial Applications
Cell Optimized for 1000X Concentration
DATASHEET | SEPTEMBER 2012
SOLAR POWER
Angular Acceptance Characteristics
Nominal Current-Voltage Characteristics
5 2.5
0.8
0.7
0.6
0.5
0.4
0.3
0
10
20
30
40
50
60
70
80
Angle of incidence relative to norm al (degrees)
90
4.5
4 2
3.5
3 1.5
2.5
2 1
1.5
1
0.5
0.5
0
0
0.00
Amps
0.9
Amps
Relative photocurrent response
1
0
0.5
1.00
1
1.5
2.00
2
Volts
2.5
Volts
Part No. 620242
| REV 2012.09
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
3.00
3
3.5