Synthesis and Characterization of Se₃₅Te_65−𝑥Ge_𝑥 Nanoparticle Films and Their Optical Properties

Table 1

Optical band gap (𝐸_𝑔), absorption coefficient (𝛼), and extinction coefficient (𝑘) at 800 nm and refractive index (𝑛) for Se₃₅Te_65−𝑥Ge_𝑥 nanoparticle films.

Sample	𝐸𝑔 (eV)	𝛼 (cm^−1)	𝑘	𝑛
Se35Te65	0.83	67670	0.431	2.41
Se35Te62Ge3	0.79	66945.9	0.426	2.53
Se35Te59Ge6	0.75	66415.8	0.423	2.65
Se35Te56Ge9	0.72	61267.4	0.390	2.77
Se35Te53Ge12	0.69	53000	0.338	2.86

The uncertainty in 𝐸_𝑔 is ± 0.01 eV.