Luminescent Hybrid Film: A High Stability Solid Inorganic Perovskite Quantum Dots Stabilized by Cellulose Nanocrystals

Chih Hao Chiang^1*, Kun You Li¹, Meng Lin Tsai¹

¹Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan

* Presenter:Chih Hao Chiang, email:kases9029@gmail.com

In the last decade, the development of perovskite quantum dots (PQD) was rapidly progressing, more and more researchers were devoted to studying this filed due to its outstanding optoelectronic properties such as narrow full width at half maximum(FWHM), color-tunable and ultrahigh photoluminescence quantum yield(PLQY) and these properties made this kind of materials attractive for electronic and optoelectronic applications in devices including solar cells, photodetectors, light emitting diodes and displays. However, the poor stability of PQD was the serious problem to apply, it was very easy to degrade or aggregate because of the water, continuous light irradiation and high temperature. Herein, we successfully synthesized a solid inorganic PQD(CsPbBr₃) hybrid film with cellulose nanocrystals(CNC), the emission wavelength was 518 nm with 22 nm of FWHM and the PLQY was 45%. By the stability test, the hybrid films maintained 94% of its original intensity under ambient condition and 80% under continuous UV light irradiation.

Keywords: inorganic, cellulose nanocrystals, perovskite, quantum dots