Light weight low cost InGaP/GaAs dual-junction solar cells on 4" epitaxial liftoff (ELO) wafers

Rao Tatavarti; G. Hillier; C. Youtsey; D. McCallum; G. Martin; A. Wibowo; R. Navaratnarajah; F. Tuminello; D. Hertkorn; M. Disabb; N. Pan

doi:10.1117/12.827449

20 August 2009 Light weight low cost InGaP/GaAs dual-junction solar cells on 4" epitaxial liftoff (ELO) wafers

Rao Tatavarti, G. Hillier, C. Youtsey, D. McCallum, G. Martin, A. Wibowo, R. Navaratnarajah, F. Tuminello, D. Hertkorn, M. Disabb, N. Pan

Author Affiliations +

Proceedings Volume 7407, High and Low Concentrator Systems for Solar Electric Applications IV; 74070B (2009) https://doi.org/10.1117/12.827449
Event: SPIE Solar Energy + Technology, 2009, San Diego, California, United States

Abstract

High-efficiency, low-cost InGaP/GaAs dual-junction epitaxial liftoff (ELO) solar cells have been fabricated on full 4" GaAs substrates. These dual-junction solar cells exhibited an efficiency of 28.69% at AM1.5D, one-sun illumination. This is the highest reported efficiency for dual-junction ELO solar cells to date. After application of antireflection coating, the dual-junction ELO cells also exhibited fill factor >85%, open circuit voltage = 2.37 V, and short circuit current density = 13 mA/cm². An external quantum efficiency >85% was measured for both the GaAs and InGaP sub-cells. An ELO dual-junction solar cell wafer typically weighs less than 1.7 g and has a total semiconductor thickness <5 μm. Reclaim and reuse of the GaAs substrate after the ELO process has been successfully demonstrated.

Citation Download Citation

Rao Tatavarti, G. Hillier, C. Youtsey, D. McCallum, G. Martin, A. Wibowo, R. Navaratnarajah, F. Tuminello, D. Hertkorn, M. Disabb, and N. Pan "Light weight low cost InGaP/GaAs dual-junction solar cells on 4" epitaxial liftoff (ELO) wafers", Proc. SPIE 7407, High and Low Concentrator Systems for Solar Electric Applications IV, 74070B (20 August 2009); https://doi.org/10.1117/12.827449

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available