ZTJ Photovoltaic Cell Advanced Triple-Junction Solar Cell for Space Applications DATASHEET | SEPTEMBER 2012 SPACE PHOTOVOLTAICS 29.5 % Minimum Average Efficiency Qualified & Characterized to the AIAA-S111-2005 7 AIAA-S112-2005 Standards Features & Characteristics Lowest solar cell mass of 84 mg/cm2 3rd Generation Triple-Junction (ZTJ) InGAP/InGaAs/Ge Solar Cells with n-on-p Polarity on 140-µm Uniform Thickness Substrate Typical Performance Data Fully space-qualified with proven flight heritage Electrical Parameters @ AMO (135.3 mW/cm2) BOL Efficiency at Maximum Power Point 29.5% Voc 2.726V Jsc 17.4 mA/cm2 Vmp 2.41V Jmp 16.5 mA/cm2 ZTJ Cell Structure Excellent radiation resistance with P/Po = 0.90 @ 1-MeV, 5E14 e/cm2 fluence Designed to accept corner-mounted silicon bypass diode for individual cell reverse bias protection Good mechanical strength for reduced attrition during assembly and laydown Weldable or Solderable contacts Standard and custom sizes available Typical ZTJ Illuminated I-V Plot Current Density (mA/cm2) 0 Solar Cell Area = 26.6cm2 -4 -8 -12 -16 -20 0 0.5 1 1.5 2 2.5 3 Voltage (V) Copyright © 2008 Emcore| REV Corporation © 2012 EMCORE Corporation 2012.09 505 332 5000 505-332-5000 505 332 5100 505-332-5100 [email protected] [email protected] www.emcore.com www.emcore.com Information contained herein is deemed to be reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specifications at any time without notice. ZTJ Photovoltaic Cell Advanced Triple-Junction Solar Cell for Space Applications DATASHEET | SEPTEMBER 2012 SPACE PHOTOVOLTAICS Optional Covered Interconnect Cell (CIC) Configurations Radiation Performance at 1 MeV Electron Irradiation, EOL/BOL Ratios Fluence (e/cm2) Voc Isc Vmp Imp Pmp 3.00 E+13 0.96 0.99 0.98 0.99 0.99 1.00 E+14 0.95 0.98 0.97 0.99 0.96 5.00 E+14 0.91 0.97 0.93 0.96 0.90 1.00 E+15 0.89 0.94 0.91 0.94 0.85 3.00 E+15 0.86 0.89 0.87 0.86 0.75 1.00 E+16 0.82 0.82 0.83 0.74 0.62 Temperature Coefficients Key Space Qualification Results Test Performed Industry Quality Standard Typical Test Results Metal Contact Thickness 4-8 μm 6 μm Dark Current Degradation after reverse bias ∆Ispec<2% <0.4% Electrical performance after 2,000 thermal cycles -180oC to +95oC <2% No Change Contact pull strength >300 grams >600 grams Electrical performance degradation after 40 day humidity exposure at 60oC and 95% relative humidity <1.5% No measurable difference Fluence (e/cm2) Voc (mV/˚C) Jsc(1) (µA/cm2-˚C) Jmp(2) (µA/cm2-˚C) Vmp (mV/˚C) Pmp (µW/ cm2 - ˚C) 0 -6.3 11.7 9.1 -6.7 -85.7 1.00 E+14 -6.6 11.4 9.1 -7.0 -92.3 1.00 E+15 -6.9 11.3 10.6 -7.3 -89.9 1.00 E+16 -7.4 11.5 13.4 -6.6 -57.2 (1) Jsc is the symbol for normalized Isc (2) Jmp is the symbol for normalized Imp About EMCORE Corporation EMCORE Photovoltaics Albuquerque, NM Incorporated in 1984 Appx. 1000 Employees Nasdaq: EMKR Regulatory EMCORE CORPORATION ISO 9001 CERTIFIED Copyright © 2008 Emcore| REV Corporation © 2012 EMCORE Corporation 2012.09 505 332 5000 505-332-5000 505 332 5100 505-332-5100 EMCORE PHOTOVOLTAICS AS9100 CERTIFIED [email protected] [email protected] www.emcore.com www.emcore.com Information contained herein is deemed to be reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specifications at any time without notice.