Nearly dispersed CuSe and Cu2-xSe crystals were successfully prepared using copper and selenium-triethylene glycol (TEG) solution thermal decomposition using triethylenetetramine (TETA) as the reducing agent and polyvinylpyrrolidone (PVP) as the capping agent at 230 °C for 1 h. The crystalline structure, electronic and copper selenide particles optical characterization were investigated using transmission electron microscopy (TEM), X-ray diffractometer (XRD), UV-visible absorbance spectra. The TETA addition effects on crystal phase development and morphology were investigated. The obtained copper selenides are CuSe and Cu2-xSe single phase for the samples added with TETA of 0.7 and 2.2 ml, respectively. The measured energy gaps for CuSe and Cu2-xSe are 2.0 eV and 2.17 eV, respectively. These synthesized compounds provide promising candidates for solar cell applications.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Mechanics of Materials