High-Efficiency Amorphous Silicon Alloy Based Solar Cells and Modules; Final Technical Progress Report, 30 May 2002--31 May 2005

Research output: NRELSubcontract Report

Abstract

The principal objective of this R&D program is to expand, enhance, and accelerate knowledge and capabilities for development of high-efficiency hydrogenated amorphous silicon (a-Si:H) and amorphous silicon-germanium alloy (a-SiGe:H) related thin-film multijunction solar cells and modules with low manufacturing cost and high reliability. Our strategy has been to use the spectrum-splittingtriple-junction structure, a-Si:H/a-SiGe:H/a-SiGe:H, to improve solar cell and module efficiency, stability, and throughput of production. The methodology used to achieve the objectives included: i) explore the highest stable efficiency using the triple-junction structure deposited using RF glow discharge at a low rate, ii) fabricate the devices at a high deposition rate for high throughput andlow cost, and iii) develop an optimized recipe using the R&D batch large-area reactor to help the design and optimization of the roll-to-roll production machines. For short-term goals, we have worked on the improvement of a-Si:H and a-SiGe:H alloy solar cells. a-Si:H and a-SiGe:H are the foundation of current a-Si:H based thin-film photovoltaic technology. Any improvement in cell efficiency,throughput, and cost reduction will immediately improve operation efficiency of our manufacturing plant, allowing us to further expand our production capacity.
Original languageAmerican English
Number of pages130
StatePublished - 2005

Bibliographical note

Work performed by United Solar Ovonic Corporation, Troy, Michigan

NREL Publication Number

  • NREL/SR-520-38728

Keywords

  • amorphous silicon
  • capacity
  • glow discharge
  • high-efficiency
  • manufacturing
  • module
  • module
  • PV
  • solar cells
  • thin films
  • triple junction

Fingerprint

Dive into the research topics of 'High-Efficiency Amorphous Silicon Alloy Based Solar Cells and Modules; Final Technical Progress Report, 30 May 2002--31 May 2005'. Together they form a unique fingerprint.

Cite this