The Effect of Polyvinylpyrrolidone on the Optical Properties of the Ni-Doped ZnS Nanocrystalline Thin Films Synthesized by Chemical Method

Table 1

The band gap of PVP, B(5 : 0), B(5 : 1), B(5 : 2), B(5 : 3), B(5 : 4), and B(5 : 7) samples with different PVP concentrations.

No.	Sample	𝐸𝑔 (eV)	Grain size (nm)
1	B(5 : 0)	3.11	2,4
2	B(5 : 1)	3.19	2,4
3	B(5 : 2)	3.24
4	B(5 : 3)	3.28
5	B(5 : 4)	3.29	2,5
6	B(5 : 7)	3.43
7	PVP	4.19