In　this　study,　a　single-source　molecular　precursor　pyrolysis　approach　for　the　synthesis　of　nearly　monodisperse　Cu2ZnSnS4　(CZTS)　nanocrystals　on　a　large　scale　is　described.　The　metallorganic　complexes　are　employed　to　decouple　the　nucleation　and　growth　stages　of　the　reaction.　The　structure　and　composition　of　the　as-synthesized　CZTS　nanocrystals　is　confirmed　by　X-ray　diffraction　(XRD),　and　Raman　scattering.　Narrowly　distributed　spherical　nanoparticles　with　the　diameter　from　8　to　20　nm　can　be　seen　from　transmission　electron　microscope　(TEM)　image.　The　absorption　spectra　indicate　that　the　tetragonal　CZTS　nanocrystals　have　an　optical　band　gap　of　1.52　eV　which　is　optimal　for　photovoltaic　applications.　(C)　2013　Elsevier　B.V.　All　rights　reserved.