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Herein we present the preparation of ultrastable CuInS 2 /ZnS-silica composites able to withstand high density irradiation for more than 100 h without degradation using a blue LED operated at 20 mA forward current. The high photostability is obtained by employing a novel polymer-infused silica/QD composite. The versatility of the (3-mercaptopropyl)trimethoxy-silane/tetraethyl orthosilicate matrix used in this study is demonstrated by incorporating QDs with positively (amine) and negatively (carboxyl) charged ligands yielding transparent and highly luminescent gels with up to 20% solid loading. Quantum yields in solution (40-50%) are retained or even slightly improved in the silica matrix further proving efficient encapsulation without damaging the nanocrystal surface. White LED fabricated from green and orange ternary QDs exhibit a luminous efficacy of 30 lm W À1 and a color rendering index of 87 as compared to a blackbody radiator with 3850 K color temperature.