High‐Color‐Rendition White QLEDs by Balancing Red, Green and Blue Centres in Eco‐Friendly ZnCuGaS:In@ZnS Quantum Dots

-doped WLEDs can achieve exceedingly slight proportional variations between red-green-blue EL intensity over time (∆CIE = (0.007, 0.009)), and high champion CRI of 94.9. This study proposes a single-component QD with balanced and stable red-green-blue PL/EL spectrum, meeting the requirements of lighting and display.