Title :
InGaP/GaAs/InGaAs inverted metamorphic (IMM) solar cells on 4″ epitaxial lifted off (ELO) wafers
Author :
Tatavarti, Rao ; Wibowo, A. ; Martin, G. ; Tuminello, F. ; Youtsey, C. ; Hillier, G. ; Pan, N. ; Wanlass, M.W. ; Romero, M.
Author_Institution :
MicroLink Devices Inc., Niles, IL, USA
Abstract :
InGaP/GaAs/InGaAs inverted metamorphic (IMM) triple junction (TJ) solar cells were fabricated on epitaxial liftoff (ELO) 100 mm diameter GaAs wafers. These ELO IMM solar cells exhibited an efficiency of 30% at one sun AM1.5D illumination, which is the highest reported efficiency for IMM ELO thin cells to date. The TJ ELO cells had fill factor (FF) >85%, open circuit voltage (Voc) of 2.78V, and short circuit current density (Jsc) of 12.64 mA/cm2. IMM ELO cells exhibited a peak efficiency of 36.3% at concentration of 264suns.
Keywords :
arsenic compounds; current density; epitaxial layers; gallium compounds; indium compounds; phosphorus compounds; solar cells; GaAs; InGaAs; InGaP; current density; epitaxial lifted off wafer; fill factor; inverted metamorphic solar cell; triple junction solar cell; voltage 2.78 V;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2010 35th IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-5890-5
DOI :
10.1109/PVSC.2010.5616004