Han, Hyowon Jeong, Beomjin Park, Tae Hyun Cha, Wonhee Cho, Suk Man Kim, Yeongsik Kim, Hong Hee Kim, Dongho Ryu, Do Yeol Choi, Won Kook Park, Cheolmin 2024-01-19T20:00:56Z 2024-01-19T20:00:56Z 2022-01-25 2019-06 1616-301X https://pubs.kist.re.kr/handle/201004/119901 Ordered nanostructured crystals of thin organic-inorganic metal halide perovskites (OIHPs) are of great interest to researchers because of the dimensional-dependence of their photoelectronic properties for developing OIHPs with novel properties. Top-down routes such as nanoimprinting and electron beam lithography are extensively used for nanopatterning OIHPs, while bottom-up approaches are seldom used. Herein, developed is a simple and robust route, involving the controlled crystallization of the OIHPs templated with a self-assembled block copolymer (BCP), for fabricating nanopatterned OIHP films with various shapes and nanodomain sizes. When the precursor solution consisting of methylammonium lead halide (MAPbX(3), X = Br-, I-) perovskite and poly(styrene)-block-poly(2-vinylpyridine) (PS-b-P2VP) is spin-coated on the substrate, a nanostructured BCP is developed by microphase separation. Spontaneous crystallization of the precursor ions preferentially coordinated with the P2VP domains yields ordered nanocrystals with various nanostructures (cylinders, lamellae, and cylindrical mesh) with controlled domain size (approximate to 40-72 nm). The nanopatterned OIHPs show significantly enhanced photoluminescence (PL) with high resistance to both humidity and heat due to geometrically confining OIHPs in and passivation with the P2VP chains. The self-assembled OIHP films with high PL performance provide a facile control of color coordinates by color conversion layers in blue-emitting devices for cool-white emission. English WILEY-V C H VERLAG GMBH Highly Photoluminescent and Environmentally Stable Perovskite Nanocrystals Templated in Thin Self-Assembled Block Copolymer Films Article 10.1002/adfm.201808193 1 ADVANCED FUNCTIONAL MATERIALS, v.29, no.26 ADVANCED FUNCTIONAL MATERIALS 29 26 N scie scopus 000478617900020 2-s2.0-85063003672 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article LIGHT-EMITTING-DIODES HALIDE NANOPARTICLES BEHAVIOR block copolymers confined crystallization nanostructures organic-inorganic metal halide perovskites self-assembly