A New Family of Wurtzite-Phase Cu2ZnAS4-x and CuZn2AS4 (A: Al, Ga, In) Nanocrystals for Solar Energy Conversion Applications.

Cu2ZnMS4-x (M: Al, Ga, In) nanocrystals are prepared by the colloidal hot-injection method starting with thermal decomposition of a 2:1:1 molar mixture of Cu(acac)2, Zn(acac)2, and M(acac)3 in oleylamine under N2 (Schlenk line, 150 °C) followed by quickly injecting a mixture of n-dodecanethiol and tert-dodecanethiol and subsequent heating (250 °C, 1 h), with the latter leading to a structural transition from the wurtzite to the stannite phase.