Fabrication and Characterization of CuInSe₂ Thin Film Applicable for a Solar Energy Light Absorption Material via a Low Temperature Solid State Reaction

Table 1

Experimental conditions and results.

No.	Materials	Precursors ratio	Measured by EDS; (Cu : In : Se)	Time (h)	Temp (°C)	Products
1^a	InCl3 + Se	1 : 1	0 : 1 : 1.06	5	220	InSe
2^a	InCl3 + Se	2 : 3	0 : 2 : 3.01	5	280	In2Se3
3^a	CuCl + Se	1 : 1	1 : 0 : 0.99	2	220	CuSe
4^a	CuCl + Se	2 : 1	1.74 : 0 : 1	2	220	Cu2Se
5^b	InSe + CuSe	1 : 1	1 : 0.79 : 1.86	3	350	CuInSe2
6^b	In2Se3 + Cu2Se	1 : 1	1 : 1.32 : 1.94	3	350	CuInSe2 + In2Se3

aSamples no. 1~4 were reaction via wet chemical process using OLA as solvent.
^bThe precursors were prepared by samples no. 1~4 and reaction through low temperature solid state reaction.