TY - JOUR
T1 - Recent developments in high-efficiency Ga0.5In0.5P/GaAs/Ge dual- and triple-junction solar cells
T2 - Steps to next-generation PV cells
AU - Karam, Nasser H.
AU - King, Richard R.
AU - Haddad, Moran
AU - Ermer, James H.
AU - Yoon, Hojun
AU - Cotal, Hector L.
AU - Sudharsanan, Rengarajan
AU - Eldredge, Jack W.
AU - Edmondson, Kenneth
AU - Joslin, David E.
AU - Krut, Dimitri D.
AU - Takahashi, Mark
AU - Nishikawa, Warren
AU - Gillanders, Mark
AU - Granata, Jennifer
AU - Hebert, Peter
AU - Cavicchi, B. Terence
AU - Lillington, David R.
N1 - Funding Information:
The authors would like to thank Robert Cravens, Peichen Pien, Beth Stone, and the entire staff of researchers at Spectrolab. The vision and hard work of many people have contributed to the achievement of a manufacturable TJ solar cell. Special thanks are due to Dieter Zemmrich at Spectrolab, Leland Goldhammer, Joel Schwartz, and Steve Pilcher of the Hughes Space and Communications Company, Jerry Olson, Sarah Kurtz, Dan Friedman, Keith Emery, and Tom Moriarty at the National Renewable Energy Laboratory, Dave Keener and Kitt Reinhart of Phillips Laboratory, Mike Price of Wright Laboratory, Henry Curtis of NASA Lewis Research Center, and Dean Marvin of the Aerospace Corporation. This work was supported in part by USAF Philips and Wright Laboratories, and by NASA Lewis Research Center under Mantech contract # F33615-95-C-5561.
PY - 2001/2
Y1 - 2001/2
N2 - Dual-junction Ga0.5In0.5P/GaAs solar cells on Ge substrates have rapidly gone from small, high-efficiency laboratory cells, to large-area, high-efficiency cells manufactured at Spectrolab in high volume. Over 500,000 of these dual-junction (DJ) cells with 27-cm2 area have been produced, with average AM0 load point efficiency of 21.4%. The next step in the evolution of this type of multijunction solar cell has been taken, with the development of triple-junction (TJ) Ga0.5In0.5P/GaAs/Ge cells. The addition of the germanium third junction, plus several significant improvements in the device structure, have led to a measured efficiency of 27.0% (AM0, 28 °C) at Spectrolab on large-area (>30 cm2) TJ cells. The TJ cell is now in production at Spectrolab. Ga0.5In0.5P/GaAs/Ge cells are viable not only for non-concentrating space applications, but also for terrestrial and space concentrator systems. Efficiencies up to 32.3% at 47 suns under the terrestrial AM1.5D spectrum have been achieved.
AB - Dual-junction Ga0.5In0.5P/GaAs solar cells on Ge substrates have rapidly gone from small, high-efficiency laboratory cells, to large-area, high-efficiency cells manufactured at Spectrolab in high volume. Over 500,000 of these dual-junction (DJ) cells with 27-cm2 area have been produced, with average AM0 load point efficiency of 21.4%. The next step in the evolution of this type of multijunction solar cell has been taken, with the development of triple-junction (TJ) Ga0.5In0.5P/GaAs/Ge cells. The addition of the germanium third junction, plus several significant improvements in the device structure, have led to a measured efficiency of 27.0% (AM0, 28 °C) at Spectrolab on large-area (>30 cm2) TJ cells. The TJ cell is now in production at Spectrolab. Ga0.5In0.5P/GaAs/Ge cells are viable not only for non-concentrating space applications, but also for terrestrial and space concentrator systems. Efficiencies up to 32.3% at 47 suns under the terrestrial AM1.5D spectrum have been achieved.
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U2 - 10.1016/S0927-0248(00)00207-5
DO - 10.1016/S0927-0248(00)00207-5
M3 - Article
AN - SCOPUS:0035254052
SN - 0927-0248
VL - 66
SP - 453
EP - 466
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
IS - 1-4
ER -