Green route synthesis of high quality CdSe quantum dots for applications in light emitting devices

Investigation was made on light emitting diodes fabricated using CdSe quantum dots. CdSe quantum dots were synthesized chemically using olive oil as the capping agent, instead of toxic phosphine. Room temperature photoluminescence investigation showed sharp 1st excitonic emission peak at 568 nm. Bi-layer organic/inorganic (P3HT/CdSe) hybrid light emitting devices were fabricated by solution process. The electroluminescence study showed low turn on voltage (∼2.2 V) .The EL peak intensity was found to increase by increasing the operating current.

Graphical abstractLight emitting diode was fabricated using CdSe quantum dots using olive oil as the capping agent, instead of toxic phosphine. Bi-layer organic/inorganic (P3HT/CdSe) hybrid light emitting device shows strong electroluminescence in the range 630–661 nm.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► CdSe Quantum dots were synthesized using olive oil as the capping agent. ► Light emitting device was fabricated using CdSe QDs/P3HT polymer heterojunction. ► The I–V characteristics study showed low turn on voltage at ∼2.2 V. ► The EL peak intensity increases with increasing the operating current.