Alloyed NCs were synthesized by the addition of Cd
or Zn precursor to a CIS synthetic reaction system as
reported previously (Li et al. 2009; Deng et al. 2012).
For the preparation of Cd-alloyed CIS NCs, indium
acetate (0.1 mmol), copper (I) acetate (0.1 mmol),
DDT (2.0 mL), oleic acid (0.4 mL), and 6 mL of
octadecene (ODE) were added into a 50 mL threenecked,
round-bottom flask. The reaction solution was
degassed under vacuum for 10 min at room temperature
until no bubbles were observed and solutions
were then heated to 140 C at a rate of 20 C/min
under vacuum using a heating mantle. An argon
atmosphere was next introduced into the flask and
CdO [0–0.5 mL of 0.1 M in ODE/oleylamine/oleic
acid (2:1:1)] was injected at 140 C. The temperature
of the resulting solution was quickly raised to 260 C
at a rate of 10 C/min.