Publications

Back-contacted and small form factor GaAs solar cell

Cruz-Campa, Jose L.; Nielson, Gregory N.; Okandan, Murat O.; Sanchez, Carlos A.; Resnick, Paul J.; Clews, Peggy J.; Pluym, Tammy P.; Gupta, Vipin P.

We present a newly developed microsystem enabled, back-contacted, shade-free GaAs solar cell. Using microsystem tools, we created sturdy 3 {micro}m thick devices with lateral dimensions of 250 {micro}m, 500 {micro}m, 1 mm, and 2 mm. The fabrication procedure and the results of characterization tests are discussed. The highest efficiency cell had a lateral size of 500 {micro}m and a conversion efficiency of 10%, open circuit voltage of 0.9 V and a current density of 14.9 mA/cm{sup 2} under one-sun illumination.