Quantum rods (QRs) have shown great potential for modern displays owing to their polarized emission and high light coupling coefficients. Here we have synthesized quantum rods of configuration CdSe/ZnxCd1-xS, which show significantly better temperature stability in comparison to the conventional Cd based QRs. Additionally, the Cd concentration was reduced, which make it more environment-friendly QRs. Unlike general lighting applications, LCD uses the RGB color filter to reproduce color images, which requires QRs with a narrow full width at half maximum (FWHM) for better color saturation. The proposed approach offers an ability to precisely tune the emission wavelength and maintain the narrow FWHM for the QRs. The fabricated QRs LED backlight shows the color triangle 118% NTSC color standards. The efficacy of designed QRLED is 90lm/W@(10mA). This work opens up the new avenues of the high-efficiency high color performance for next-generation LED backlight.