Structural and Optical Properties of P-Type Cuprous Oxide (P-Cu₂O) Thin Films Prepared by Chemical Deposition
Mekhtiyeva SI, Alıyeva LA*, Alekberov RI, Tapdygov ES, Mammadova HI, Sabzalieva CHE, Eminova NN, Guliyeva KHM, Atayeva SU and Afandiyeva LV
ABSTRACT
In the presented paper, p-type cuprous oxide (p-Cu2O) thin films of various thicknesses (d= 2 μm; 3 μm and 5 μm) were obtained by chemical deposition method. The mechanisms of the influence of the thickness of the obtained p-Cu2O thin films on the optical transmission and absorption spectra were analyzed.A systematic red shift of the fundamental optical absorption edge toward lower photon energies, within the range of E = 0.37–0.44 eV, has been observed with increasing sample thickness. This phenomenon is primarily attributed to the enhancement of crystalline quality, accompanied by a reduction in the density of surface defects and a suppression of sub-bandgap optical transitions associated with localized defect states.
