ATJ Photovoltaic Cell Advanced Triple-Junction Solar Cell for Space Applications DATASHEET | SEPTEMBER 2012 SPACE PHOTOVOLTAICS 27.5 Minimum Average Efficiency Features & Characteristics Lowest solar cell mass of 84 mg/cm2 Advanced Triple-Junction (ATJ) InGAP/InGaAs/Ge Solar Cells with n-on-p Polarity on 140-µm Uniform Thickness Substrate Fully space-qualified with proven flight heritage in LEO and GEO environments Typical Performance Data Electrical Parameters @ AMO (135.3 mW/cm2) 28oC BOL Efficiency at Maximum Power Point 27.5% Voc 2.60V Jsc 17.1 mA/cm2 Vmp 2.30V Jmp 16.2 mA/cm7 Excellent radiation resistance with P/Po = 0.89 @ 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 Available at EPI, cell, CIC or panel configuration ATJ Cell Structure Typical ATJ Illuminated I-V Plot Solar Cell Area = 26.6 cm 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. ATJ 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 Efficiency 5E 13 0.97 1.00 0.97 1.00 0.97 0.97 1E 14 0.96 1.00 0.96 1.00 0.96 0.96 5E 14 0.92 0.98 0.92 0.96 0.89 0.89 1E 15 0.90 0.96 0.90 0.94 0.85 0.85 3E 15 0.86 0.90 0.85 0.87 0.74 0.74 Temperature Coefficients Fluence (e/cm2) Key Space Qualification Results Typical Test Results ∆Voc/∆T (mV/oC) Jsc/∆T(1) (μA/oCcm2) Vm/∆T (mV/oC) Jmp/∆T(2) (μA/oCcm2) BOL -5.48 +12 -5.93 +11 5E 13 -5.49 +10 -5.68 +7 1E 14 -5.46 +11 -5.66 +7 5E 14 -5.61 +12 -5.92 +12 1E 15 -5.7 +12 -6.14 +13 Test Performed Industry Quality Standard Metal Contact Thickness 4-10 μm Dark Current Degradation after reverse bias ∆Ispec<2% <0.4% (1) Jsc is the symbol for normalized Isc Electrical performance after 2,000 thermal cycles -180oC to +95oC <2% <0.7% (2) Jmp is the symbol for normalized Imp High-Temperature Anneal at 200oC for >5,000 hrs. <2% No measurable difference 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 6 μm 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.