Research Article

Influence of the DEA Concentration on Structural and Optical Properties of Nanodot PbS Thin Films Growth by Chemical Solution Deposition: Unveiling Dual Optical Absorption Edges

Table 3

Summary of band gap values, cutoff wavelength, crystallite size, confinement energy, and Urbach energy tail values of PbS-QD films, as a function of complex agent molarity of DEA.

Sample no.Eg1 (eV)λcut-off1 (nm)D1 (nm)E1confi (eV)EU1 (eV)Eg2 (eV)λcut-off2 (nm)D2 (nm)E2confi (eV)EU2 (eV)

S1: 0.4 M2.285444.31.930.5540.651,90811.50.2660.508
S2: 1.2 M1.717255.11.3580.5960.861,4428.50.4850.241
S3: 2.0 M1.309546.10.9380.7210.881,4098.40.5050.258