New York Angels New York Angels New York Angels is an organization of business angel investors based in New York, New York, US that provides equity capital for early stage companies, primarily in the field of technology and new media. Its members typically invest between US$250,000 and US$1,000,000 in companies that have begun operations but are not yet ready for venture capital. New York Angels is the successor group to the Angel Investor Program of the former New York New Media Association (NYNMA), which began as the industry association representing the fast-growing technology companies in what was nicknamed Silicon Alley. In 1997, at
Polycrystalline silicon grain boundaries, see figure 1. The resistivity, mobility, and free-carrier concentration in monocrystalline silicon vary with doping concentration of the single crystal silicon. Whereas the doping of polycrystalline silicon does have an effect on the resistivity, mobility, and free-carrier concentration, these properties strongly depend on the polycrystalline grain size, which is a physical parameter that the material scientist can manipulate. Through the methods of crystallization to form polycrystalline silicon, an engineer can control the size of the polycrystalline grains which will vary the physical properties of the material. The use of polycrystalline silicon in the production of solar cells requires