Changfeng Chen, Yi Zheng, Chaolong Fang. Improvement of Luminescence Efficiency and Stability of CsPbBr3 Quantum Dot Films with Microlens Array Structure[J]. Chinese Journal of Lasers, 2021, 48(13): 1313001
- Chinese Journal of Lasers
- Vol. 48, Issue 13, 1313001 (2021)
Fig. 1. Schematic diagram of PDMS solution preparation procedure
Fig. 2. Preparation procedure diagram of microlens-array PDMS coating with CsPbBr3 QDs
Fig. 3. Fluorescence spectra of PDMS films with different quantum dot concentrations
Fig. 4. Relationship between the photoluminescence intensity and the bending times of the PDMS films(inset: initial state of the film as well as photos under white light and 365 nm light in the bending state)
Fig. 5. Water stability of PDMS films with CsPbBr3 quantum dots. (a) Relationship between the photoluminescence intensity and the time after the PBCs QDs were immersed in water; (b) photoluminescence spectra of PBCs QDs PDMS films after immersion in water
Fig. 6. Measurement results. (a) Normalized photoluminescence spectra of CsPbBr3 quantum dots PDMS film with and without microlens array (inset: photo of CsPbBr3 quantum dots PDMS film with or without microlens array pattern); (b) SEM image of microlens array
Fig. 7. Ray tracing diagram of the lead-cesium bromide quantum dot PDMS film at θ=0°, 30°, and 60°. (a) Micro lens array structure; (b) flat lead-cesium bromide quantum dot PDMS film
Fig. 8. Shape of a 2 μL deionized water on the surface of PDMS with or without microlens array structure. (a) Contact angle of water droplet on PDMS microlens array surface showing 138.6°; (b) contact angle of water droplet on flat PDMS surface showing 96.7°
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