Jeong, Byeong Guk Park, Young-Shin Chang, Jun Hyuk Cho, Ikjun Kim, Jai Kyeong Kim, Heesuk Char, Kookheon Cho, Jinhan Klirnov, Victor I. Park, Philip Lee, Doh C. Bae, Wan Ki 2024-01-20T03:30:43Z 2024-01-20T03:30:43Z 2021-09-04 2016-10 1936-0851 https://pubs.kist.re.kr/handle/201004/123638 Thick inorganic shells endow colloidal nanocrystals (NCs) with enhanced photochemical stability and suppression of photoluminescence intermittency (also known as blinking). However, the progress of using thick-shell 100 90 heterostructure NCs in applications has been limited due to the low photoluminescence quantum yield (PL QY <= 60%) at room temperature. Here, we demonstrate thick-shell NCs with CdS/CdSe/CdS seed/spherical quantum well/shell (SQW) geometry that exhibit near-unity PL QY at room temperature and suppression of blinking. In SQW NCs, the lattice mismatch is diminished between the emissive CdSe layer and the surrounding CdS layers as a result of coherent strain, which suppresses the formation of misfit defects and consequently permits, similar to 100% PL QY for SQW NCs with a thick CdS shell (>5 nm). High PL QY of thick-shell SQW NCs is preserved even in concentrated dispersion and in film under thermal stress, which makes them promising candidates for applications in solid-state concentrators. English AMER CHEMICAL SOC LIGHT-EMITTING-DIODES LUMINESCENT SOLAR CONCENTRATORS CORE-SHELL NANOCRYSTALS AUGER RECOMBINATION EPITAXIAL MULTILAYERS HIGHLY LUMINESCENT DOTS CDSE PERFORMANCE THICKNESS Colloidal Spherical Quantum Wells with Near-Unity Photoluminescence Quantum Yield and Suppressed Blinking Article 10.1021/acsnano.6b03704 1 ACS NANO, v.10, no.10, pp.9297 - 9305 ACS NANO 10 10 9297 9305 scie scopus 000386423600029 2-s2.0-84993949348 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article LIGHT-EMITTING-DIODES LUMINESCENT SOLAR CONCENTRATORS CORE-SHELL NANOCRYSTALS AUGER RECOMBINATION EPITAXIAL MULTILAYERS HIGHLY LUMINESCENT DOTS CDSE PERFORMANCE THICKNESS spherical quantum well near-unity photoluminescence quantum yield coherently strained heterostructure misfit defect critical thickness