I did a survey and this is the best i got. Makers: (1) BP Solar technology: Advanced multicrystalline & monocrystalline silicon nitride; (2) First Solar modules: Thin film cadmium telluride; (3) Nanosolar: Thin film CIGS (copper indium gallium selenium); (4) Sharp: Monocrystalline & polycrystalline (silicon?) (Thin film?); (5) Evergreen Solar: Silicon (Mono? Poly? not mentioned).
The questions in above are due to incompleteness of disclosure (on the web).
Of those technologies, which one is the MOST efficient in conversion of light / solar energy to electrical power (assume ideal load for given panel)? Is there another (commercially available) technology even more efficient?