One-pot synthesis of red light-emitting CdTexSe(1−x) quantum dots for light-emitting diode application.

Red light-emitting CdTexSe(1−x) quantum dots (QDs) were synthesized as a new red phosphor for light-emitting diodes. CdTexSe(1−x) QDs were characterized through X-ray diffraction, high-resolution transmission electron microscopy, photoluminescence spectroscopy, and UV–Vis absorption spectroscopy. Results revealed that red-emitting CdTexSe(1−x) QDs were highly crystalline and had good optical properties. A red LED device was fabricated by combining red light-emitting CdTexSe(1−x) QDs as the phosphor with a near-UV InGaN LED chip as the excitation source. The CIE color coordinates of the red LED at (0.6778 and 0.3106) when the reflux time was 1 h. Therefore, CdTexSe(1−x) QDs are good candidates for LED applications. [ABSTRACT FROM AUTHOR]