Abstract
CdSe-derived quantum dots (QDs) materials are highly luminescent and have been promisingly implementing a wide range of applications. However, CdSe-derived QDs with controllable emission wavelength and composition always require a highly complicated synthetic process, which badly hinders its mass production. Here, we present a simple one-step hot injection method to synthesize the versatile CdxZn1-xSySe1-y (x = 0.12, 0.17, 0.23, 0.33, y = 0, 0.64, 1) QDs with controllable composition and large-span emission wavelengths. Only by varying the molar ratios of Cd to Zn and Se to S, the emission wavelength span of the as-obtained gradient alloyed CdxZn1-xSySe1-y QDs is widely closed to 200 nm (445–643 nm), and the narrow full width at half-maximum surprisingly emerges down to 14 nm, evidently revealing that excellent self-regulating ability and superior monochromaticity. Using these different coloured QDs, we fabricate the typical red, yellow and blue light emitting diode (LED) lamps integrated with the ultraviolet chip (365 nm), showing steady and bright emission. The above results afford an efficient method to control the optical properties of QDs and ensure their processibility for further purposes in variable optoelectronics.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.