High-stability inorganic perovskite quantum dot-cellulose nanocrystal hybrid films

Chih Hao Chiang, Ting You Li, Han Song Wu, Kun You Li, Chiao Fang Hsu, Liang Feng Tsai, Po Kang Yang, Ya Ju Lee, Hsiang Chieh Lee, Chiu Yen Wang, Meng Lin Tsai

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    Inorganic perovskite quantum dots (IPQDs) such as cesium lead halide (CsPbX3, X = Cl, Br and I) quantum dots have attracted much attention for developing cadmium-free quantum light-emitting displays (QLEDs) based on outstanding light emission properties including narrow full width at half maximum (FWHM), tunable bandgap and ultrahigh (>90%) photoluminescence quantum yield (PLQY). Nevertheless, their poor stability under ambient conditions, at high temperature or under continuous light irradiation is the main problem for practical applications. In this study, a new method is proposed to effectively stabilize CsPbBr3 IPQDs by synthesizing them with sulfate-functionalized cellulose nanocrystals (CNCs) at room temperature without using traditional quantum dot stabilizers such as oleylamine (OLA) and oleic acid (OA). The as-prepared CsPbBr3 IPQD/CNC hybrid paper-like films are highly stable and the relative photoluminescence (PL) intensity can be maintained at 92% under continuous UV light (306 nm, 15 W) illumination for 130 h, >99% at high temperature (100 °C) for 130 h, and >99% in ambient conditions for 15 d. Additionally, the PLQY and FWHM of IPQD/CNC are 45.69% and 22 nm, respectively. The ultrahigh stability and narrow FWHM characteristics proposed here for IPQD/CNC hybrid films can provide new possibilities for practical applications in the future development of IPQD-related devices.

    Original languageEnglish
    Article number324002
    JournalNanotechnology
    Volume31
    Issue number32
    DOIs
    Publication statusPublished - 2020 Aug 7

    Keywords

    • cadmium-free
    • cellulose nanocrystals
    • inorganic
    • perovskite
    • quantum dots

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering
    • Electrical and Electronic Engineering

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