CTJ Photovoltaic Cell – 10 mm x 10 mm Triple-Junction Solar Cell for Terrestrial Applications DATASHEET | SEPTEMBER 2012 SOLAR POWER 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 50 W/cm2, 25°C Custom design is also available for variables such as cell size, operating intensity, spectrum, and temperature Weldable or solderable front and back contact metallization terminated in silver/gold alloy Parameter Value at 25°C, 50 W/cm2 Efficiency (%) 39.6 A variety of shipping options are available, including waffle packs, tape and reel, or processed wafers Isc (Amps) 6.48 300 MW/yr manufacturing capacity Imp (Amps) 6.34 Voc (Volts) 3.19 Vmp (Volts) 2.76 All cells are flash tested at concentration at 25°C Nominal Temperature Coefficients at 50 W/cm2 Parameter Relative, at 25°C Efficiency -0.04 absolute %/°C -1080 PPM/°C Vmp -4.5 milliVolts/°C -1610 PPM/°C 570 PPM/°C 570 PPM/°C Jmp responsivity@Vmp Efficiency vs. Concentration Characteristics Absolute, 10°C to 100°C Range 4.7 7.7 2 milliamps/cm /°C -5 x10 Amps/Watt/°C 40 efficiency (%) 39 38 37 36 35 34 33 1500 ( 1300 1100 900 700 500 300 100 t ti Concentration (suns) ) | 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 – 10 mm x 10 mm Triple-Junction Solar Cell for Terrestrial Applications DATASHEET DATASHEET | SEPTEMBER 2012 SOLAR POWER SOLAR POWER Nominal Current-Voltage Characteristics 1 8 0.9 7 0.8 6 0.7 5 Amps Relative photocurrent response Angular Acceptance Characteristics 0.6 4 0.5 3 0.4 2 0.3 1 0 10 20 30 40 50 60 70 80 Angle of incidence relative to norm al (degrees) 90 0 0 0.5 1 1.5 2 2.5 Volts | 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 3.5