TY  - EJOUR
AU  - Khairnar, Nikita 
AU  - Kwon, Hyukmin 
AU  - Park, Sunwoo 
AU  - Park, Sangwook 
AU  - Lee, Hayoon 
AU  - Park, Jongwook 
TI  - Perovskite Quantum Dot/Zinc Oxide Composite Films for Enhanced Luminance
T2  - Crystals
PY  - 2024
VL  - 14
IS  - 11
SN  - 2073-4352
AB  - We conducted experiments utilizing the scattering effect of zinc oxide (ZnO) to enhance the photoluminescence (PL) intensity of cesium lead bromide (CsPbBr3) perovskite quantum dots (QDs). This study involved investigating the method for creating a CsPbBr3 and ZnO mixture and determining the optimal mixing ratio. A mixture dispersion of CsPbBr3 and ZnO, prepared at a 1:0.015 weight ratio through shaking, was fabricated into a film using the spin coating method. The PL intensity of this film showed a relative increase of 20% compared to the original CsPbBr3 QD film without ZnO. The scattering effect of ZnO was confirmed through ultraviolet-visible (UV-Vis) absorption and transient PL experiments, and a long-delayed exciton lifetime was observed in the optimized mixture dispersion thin film. The morphology of the fabricated film was characterized using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM). For the CsPbBr3-ZnO mixture (1:0.0015) film, crystal domains of approximately 10 nm were observed using TEM. Through AFM analysis, an excellent film roughness of 4.6 nm was observed, further confirming the potential of perovskite QD/ZnO composite films as promising materials for enhanced photoconversion intensity. In future studies, applying this method to other perovskite materials and metal oxides for the optimization of photoconversion composite materials is expected to enable the fabrication of highly efficient perovskite QD/metal oxide composite films.
KW  - perovskite quantum dots
KW  - metal oxide
KW  - ZnO
KW  - light scattering
DO  - 10.3390/cryst14110937
ER  -