A High-Yield Synthesis of Chalcopyrite CuInS_𝟐 Nanoparticles with Exceptional Size Control

Table 2

Atomic percents and ratios by XPS of a CuInS₂ nanoparticle produced at 160°C.

Sputtering time (min)	Cu (%)	In (%)	S (%)	Cu : In ratio	S : (Cu+In) ratio
0	24.2	23.9	51.9	1.01	1.08
1	25.8	25.4	48.8	1.02	0.95
2	26.7	25.6	47.7	1.04	0.91
3	25.6	26.9	47.5	0.95	0.90
4	27.7	29.0	43.3	0.96	0.76