Mussel‐inspired chemistry, motivated by the adhesive proteins secreted by mussels for attachment to wet surfaces, is an emerging technique for manipulating the surface properties of a variety of materials. Here, a facile mussel‐inspired poly(N‐vinyl pyrrolidone) (PVP) polymer encapsulation with trivial influence on inherent optical properties of perovskite quantum dots (QDs) is demonstrated to efficiently combat the low intrinsic thermal, chemical, and photostability of CsPbBr3 QDs. The suitability of photopolymer‐processed PVP‐CsPbBr3 QDs flexible films as color components in white light–emitting devices is substantiated.

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