Short Essay

Blue Shift Behavior of CdSe Nano-particles Depending on the Concentration of Selenium

Bharati Debi Biswas

Department of Physics, Sreegopal Banerjee College, Bagati, Mogra, Hooghly. Mogra-7125037, West Bengal, India.

Email: sujatab88@gmail.com

Abstract

In this work, we examined the photoluminescence (PL) spectrum behaviour of freshly manufactured CdSe nano-flowers alongside their chemically or thermally modified nanoparticle equivalents. A solvothermal technique was used to create the CdSe nano-flowers, which had distinct petal structures and extremely crystalline, flower-like morphologies. Through carefully regulated post-synthesis procedures, the nanoparticles were then transformed into more spherical or irregularly shaped particles. Various CdSe nanostructures were created based on the selenium powder content. As the concentration of selenium powder increased and the size of the produced nanostructures decreased, a blue shift was observed. The band gap energy increased as the dimensions of the nanostructures decreased. It is evident from photoluminescence spectra that there was a prominent peak at higher wavelengths that could form a double in the spectrum.

Keywords: X-ray diffraction; Photoluminescence; CdSe nanostructures; Solvothermal; UV-vis spectra.

DOI: https://doi.org/10.64456/panch2025v16i2.04