efficiently into the nanorods while the valence band should be of sufficiently low energy to inject holes into the polymer valence band the latter constraint is generally straightforward to satisfy as suitable polymers having a higher energy valence band than the nanocrystal can readily be identified subject to the above constraints the bandgap of the nanocrystal should be small enough to allow for a large portion of the solar spectrum to be absorbed suitable nanocrystal materials include materials based on copper indium diselenide and variants thereof for example cuins 2 cuinse 2 or cuin 1 u2212 x ga x se 2 wherein 0 u2266 x u2266 1 as well as cdse gaas inas and inp nanocrystals can be synthesized using techniques described for example in u s pat no 6 379 635 and co pending u s patent application ser nos 11 579 050 and 11 588 880 the entire contents of which are hereby incorporated by reference a method for producing cigs nanocrystals of any desirable stoichiometry employing a selenol compound is disclosed in u s provisional application ser no 60 991 510 the entire content of which is hereby incorporated by reference embodiments of the method involve dispersing at least a first portion of a nanocrystal precursor composition comprising sources of at least one of al ga and or in and at least one of cu ag zn and or cd in a solvent e g a long chain hydrocarbon solvent heating the solvent to a first temperature for an appropriate length of time adding a selenol compound to the solvent and heating.