The primary focus of our expertise is on releasing epitaxial structures from their host wafer using the Epitaxial Lift-Off (ELO) process and on the subsequent processing of the released thin-films into working solar cells.

We have successfully performed ELO on a wide range of devices and substrates, including:

  • • 2, 3 and 4 inch wafers
  • • GaAs and Ge wafers
  • • new and multiple times reused wafers
  • • MOCVD and MBE grown solar cell structures
  • • single, dual and triple-junction solar cell structures
  • • inverted and upright solar cell structures
  • • lattice matched and metamorphic solar cell structures
  • • released film size up to 97 mm

We have processed the released thin-films into (arrays of) ultra-thin solar cells with areas ranging from 0.25 to 30 cm2 and with a performance similar to wafer-based counterparts.

At tf2 devices we continuously improve our technology and expand our expertise by participating in several research projects and by maintaining a close working relationship with the Radboud University Nijmegen.

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