NDLI: Encapsulated Passivation of Perovskite Quantum Dot $(CsPbBr_{3}$) Using a Hot-Melt Adhesive (EVA-TPR) for Enhanced Optical Stability and Efficiency

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Encapsulated Passivation of Perovskite Quantum Dot $(CsPbBr_{3}$) Using a Hot-Melt Adhesive (EVA-TPR) for Enhanced Optical Stability and Efficiency

Content Provider	MDPI
Author	Prasad, Saradh Aljaafreh, Mamduh AlSalhi, Mohamad Alshammari, Abeer
Copyright Year	2021
Description	The notable photophysical characteristics of perovskite quantum dots (PQDs) (CsPbBr3) are suitable for optoelectronic devices. However, the performance of PQDs is unstable because of their surface defects. One way to address the instability is to passivate PQDs using different organic (polymers, oligomers, and dendrimers) or inorganic (ZnS, PbS) materials. In this study, we performed steady-state spectroscopic investigations to measure the photoluminescence (PL), absorption (A), transmission (T), and reflectance (R) of perovskite quantum dots ( $CsPbBr3$ ) and ethylene vinyl acetate/terpene phenol (1%) (EVA-TPR (1%), or EVA) copolymer/perovskite composites in thin films with a thickness of 352 ± 5 nm. EVA is highly transparent because of its large band gap; furthermore, it is inexpensive and easy to process. However, the compatibility between PQDs and EVA should be established; therefore, a series of analyses was performed to compute parameters, such as the band gap, the coefficients of absorbance and extinction, the index of refractivity, and the dielectric constant (real and imaginary parts), from the data obtained from the above investigation. Finally, the optical conductivities of the films were studied. All these analyses showed that the EVA/PQDs were more efficient and stable both physically and optically. Hence, EVA/PQDs could become copolymer/perovskite active materials suitable for optoelectronic devices, such as solar cells and perovskite/polymer light-emitting diodes (PPLEDs).
Starting Page	419
e-ISSN	20734352
DOI	10.3390/cryst11040419
Journal	Crystals
Issue Number	4
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-04-13
Access Restriction	Open
Subject Keyword	Crystals Inorganic Chemistry Perovskite Quantum Dots Hot-melt Adhesive Ethylene-vinyl Acetate (eva) Terpene-phenol (tpr) Thin Films
Content Type	Text
Resource Type	Article

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