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Colloidal Synthesis of CdSe Nanocrystals: Preparation, Characterization in Different Organic Solvent

Colloidal CdSe Nanocrystals (NCs) or quantum dots (QDs) have been developed using a yielding solution technique utilizing chemical reactions in chloroform and oleic acid in different organic solvents. This assembly is an improvement of the systematic thermal decomposition of high temperature organic solvent compounds. CdSe NCs of specific sizes can be produced easily by adjusting the solvent. This technique is reproducible and clear, so industrial development can be easily scaled up. Characterization at room temperature of the UV-Vis absorption and Photoluminescence (PL) spectra. Results reveal that the CdSe prepared with the creation of defects was nanocrystalline. The energy difference (Eg) measured in PL was 2.3 and 2.69 eV respectively for CdSe NCs in chloroform and oleic acid. The structures of the CdSe quantum dots were determined by scanning electron microscopy (SEM). The phase-transfer of chloroform and oleic acid stabilized CdSe nanocrystals solutions was studied for their potentials in white light generation applications.