ATJM Photovoltaic Cell

ATJM Photovoltaic Cell
Advanced Triple-Junction with Monolothic Diode Solar Cell for Space Applications
DATASHEET | SEPTEMBER 2012
SPACE PHOTOVOLTAICS
27.0% Minimum Average Efficiency
Features & Characteristics
„„ 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
„„ Fully Space-Qualified Monolithic Bypass Diode Protection
Typical Performance Data
„„ Lowest solare cell mass of 84 mg/cm2
Solar Cell Electrical Output Parameters
Electrical Parameters @ AMO (135.3 mW/
cm2)
27%
Voc
2.575V
Jsc
16.9 mA/cm2
Vmp
2.285V
Jmp
16.0 mA/cm7
„„ Excellent radiation resistance with P/Po = 0.89 @ 1-MeV,
5E14 e/cm2 fluence
„„ Excellent Mechanical Strenght for Rduced Attrition during Assembly and Laydown
„„ Weldable or Solderable contacts
Monolithic Diode Electrical Performance
„„ Available at EPI, cell, CIC or panel configuration
VRB<2.0V @ IRB
500 mA, 28°C
IRB<50 μA @ VRB
2.5V (Dark), 28°C
IRB<200 μA @ VRB
2.5V (Illuminated), 28°C
IRB<10 μA @ VRB
2.5V (Dark), -150°C
IRB<1 μA @ VRB
2.5V (Dark), +120°C
„„ Standard and Custom Sizes Available
Typical Current (I) / Voltage (V) Plot
1.0
ATJM Cell Structure
Monolithic Diode
p/n –I nGaAs
n/p –I nGaP Junction
Current (I)
0.5
-2.0
-1.0
-0.5
Voc :
Isc :
FF :
Efficiency :
0
2570 mV
466 mA
0.84
27.0%
1.0
2.0
3.0
-0.5
InGaAs Junction
-1.0
Ge Junction
-1.5
Darkness
Illumination
Solar Cell Area = 27.5 cm²
Voltage (V)
Ge Substrate
Schematic Cross-Sectional View
Copyright
© 2008
Emcore| REV
Corporation
©
2012 EMCORE
Corporation
2012.09
505 332 5000
505-332-5000
505 332 5100
505-332-5100
photovoltaic-sales@emcore.com
photovoltaic-sales@emcore.com
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.
ATJM Photovoltaic Cell
Advanced Triple-Junction with Monolothic Diode Solar Cell for Space Applications
DATASHEET | SEPTEMBER 2012
SPACE PHOTOVOLTAICS
Radiation Performance at 1 MeV Electron
Irradiation, EOL/BOL Ratios
Temperature Coefficients
Fluence (e/cm2)
Fluence (e/cm )
Voc
Isc
Vmp
Imp
Pmp
Efficiency
5E 13
0.97
1.00
0.97
1.00
0.97
0.97
2
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
∆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
-5.77
+12
-6.14
+13
„„ (1) Jsc is the symbol for normalized Isc
„„ (2) Jmp is the symbol for normalized Imp
Key Space Qualification Results
Test Performed
Industry Quality
Standard
Typical Test
Results
Metal Contact Thickness
4-10 μm
6 μm
Dark Current Degradation after reverse bias
∆Ispec<2%
<0.4%
Electrical performance after 2,000 thermal cycles
-180oC to +95oC
<2%
<0.7%
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
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
photovoltaic-sales@emcore.com
photovoltaic-sales@emcore.com
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.