Final Report for PV Incubator Subcontract No. NAT-0-99013-01: June 14, 2010 - March 2, 2012

Kaitlyn VanSant, Kaitlyn VanSant (NREL Technical Monitor)

Research output: NRELSubcontract Report


The goal of the subcontract is to scale up Semprius' novel micro-cell based modules to an annualized rate of 500 kW of receivers and 10 kW of modules, in support of the DOE 2020 Sunshot Initiative goals. The statement of work (SOW) was broken up into two Phases. Phase I was directed towards process development efforts towards addressing fundamental manufacturing metrics such as yield, die perwafer, automation and throughput. Phase II objectives are to scale to an annualized production rate of 500 kW of receivers and 10 kW of modules, while improving cell efficiency, module efficiency and transfer yield. Semprius has met all the technical milestones and deliverables for the contract. All subtasks were completed earlier than expected and the results exceeded the technical targets. Inparticular, 3J cell efficiency of 41.2% exceeded the target of 38%, module efficiency of 28.3% exceeded the target of 28% and transfer yield of 96.4% exceeds the target of 95%, with all tasks completed well ahead of schedule. Also, devices fabricated from 1st use GaAs substrates and substrates with two re-uses have been shown to be identical.
Original languageAmerican English
Number of pages40
StatePublished - 2012

Bibliographical note

Work performed by Semprius, Durham, North Carolina

NREL Publication Number

  • NREL/SR-5200-54690


  • concentrators
  • contracting photovoltaics
  • CPV
  • micro-cell
  • multijunction solar cells
  • photovoltaics
  • PV
  • transfer printing

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