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 responsivity@Vmp 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