Larry C H Wang

  • Citations Per Year
Learn More
We investigated phosphorus and boon implanted emitter and selective emitter junction formation comparing; 1) 15keV to 30keV implant energies, 2) implant dopant dose concentration between 3E14/cm2 to 1E16/cm<sup>2</sup> and 3) various anneal conditions from high temperature (&gt;;1407&#x00B0;C) laser melt annealing to low temperature (&lt;;500&#x00B0;C)(More)
This study documented the relationships among dietary intake, growth failure, and anemia in a convenience sample of 172 children aged 1 to 5 years in rural Yunnan Province, China. We hypothesized that most children would have suboptimal intakes of key nutrients associated with child growth and anemia and that undernutrition would be more common in children(More)
Impurities can adversely affect wafer yields and solar cell performance. Secondary Ion Mass Spectrometry (SIMS) is a very effective technique to quantitatively measure the elemental impurity concentrations in CIGS and CdTe based thin film solar cells. Na in CIGS: Na is an important composition element in CIGS based solar cells. SIMS depth profiles can(More)
CuIn<inf>x</inf>Ga(<inf>1&#x2212;x</inf>)Se<inf>2</inf> (CIGS) is one of the most promising thin film PV materials due to its high efficiency, variety of growth methods available, and compatibility with flexible substrates enabling roll-to-roll manufacturing. The goal for all PV is low cost per watt, the solar industry's key metric. CIGS offers similar(More)
Conversion efficiency for Cu(In<inf>x</inf>, Ga<inf>1&#x2212;x</inf>)Se<inf>2</inf> is dependent on a number of factors including band-gap and defect structures. Material composition affects band gap and it affects the formation of defect structures. A fundamental understanding of the relationship between material composition, band gap and defect structures(More)
  • 1