Enhancement of Light Amplification of CsPbBr<sub>3</sub> Perovskite Quantum Dot Films via Surface Encapsulation by PMMA Polymer
Photonic devices based on perovskite materials are considered promising alternatives for a wide range of these devices in the future because of their broad bandgaps and ability to contribute to light amplification. The current study investigates the possibility of improving the light amplification c...
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MDPI AG
2021-08-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/15/2574 |
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| author | Saif M. H. Qaid Hamid M. Ghaithan Khulod K. AlHarbi Bandar Ali Al-Asbahi Abdullah S. Aldwayyan |
| author_facet | Saif M. H. Qaid Hamid M. Ghaithan Khulod K. AlHarbi Bandar Ali Al-Asbahi Abdullah S. Aldwayyan |
| author_sort | Saif M. H. Qaid |
| collection | DOAJ |
| description | Photonic devices based on perovskite materials are considered promising alternatives for a wide range of these devices in the future because of their broad bandgaps and ability to contribute to light amplification. The current study investigates the possibility of improving the light amplification characteristics of CsPbBr<sub>3</sub> perovskite quantum dot (PQD) films using the surface encapsulation technique. To further amplify emission within a perovskite layer, CsPbBr<sub>3</sub> PQD films were sandwiched between two transparent layers of poly(methyl methacrylate) (PMMA) to create a highly flexible PMMA/PQD/PMMA waveguide film configuration. The prepared perovskite film, primed with a polymer layer coating, shows a marked improvement in both emission efficiency and amplified spontaneous emission (ASE)/laser threshold compared with bare perovskite films on glass substrates. Additionally, significantly improved photoluminescence (PL) and long decay lifetime were observed. Consequently, under pulse pumping in a picosecond duration, ASE with a reduction in ASE threshold of ~1.2 and 1.4 times the optical pumping threshold was observed for PQDs of films whose upper face was encapsulated and embedded within a cavity comprising two PMMA reflectors, respectively. Moreover, the exposure stability under laser pumping was greatly improved after adding the polymer coating to the top face of the perovskite film. Finally, this process improved the emission and PL in addition to enhancements in exposure stability. These results were ascribed in part to the passivation of defects in the perovskite top surface, accounting for the higher PL intensity, the slower PL relaxation, and for about 14 % of the ASE threshold decrease. |
| first_indexed | 2024-03-10T09:10:09Z |
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| language | English |
| last_indexed | 2024-03-10T09:10:09Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-738e04ae86c940cdbb53c73a829128df2023-11-22T06:04:56ZengMDPI AGPolymers2073-43602021-08-011315257410.3390/polym13152574Enhancement of Light Amplification of CsPbBr<sub>3</sub> Perovskite Quantum Dot Films via Surface Encapsulation by PMMA PolymerSaif M. H. Qaid0Hamid M. Ghaithan1Khulod K. AlHarbi2Bandar Ali Al-Asbahi3Abdullah S. Aldwayyan4Physics and Astronomy Department, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaPhysics and Astronomy Department, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaPhysics and Astronomy Department, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaPhysics and Astronomy Department, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaPhysics and Astronomy Department, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaPhotonic devices based on perovskite materials are considered promising alternatives for a wide range of these devices in the future because of their broad bandgaps and ability to contribute to light amplification. The current study investigates the possibility of improving the light amplification characteristics of CsPbBr<sub>3</sub> perovskite quantum dot (PQD) films using the surface encapsulation technique. To further amplify emission within a perovskite layer, CsPbBr<sub>3</sub> PQD films were sandwiched between two transparent layers of poly(methyl methacrylate) (PMMA) to create a highly flexible PMMA/PQD/PMMA waveguide film configuration. The prepared perovskite film, primed with a polymer layer coating, shows a marked improvement in both emission efficiency and amplified spontaneous emission (ASE)/laser threshold compared with bare perovskite films on glass substrates. Additionally, significantly improved photoluminescence (PL) and long decay lifetime were observed. Consequently, under pulse pumping in a picosecond duration, ASE with a reduction in ASE threshold of ~1.2 and 1.4 times the optical pumping threshold was observed for PQDs of films whose upper face was encapsulated and embedded within a cavity comprising two PMMA reflectors, respectively. Moreover, the exposure stability under laser pumping was greatly improved after adding the polymer coating to the top face of the perovskite film. Finally, this process improved the emission and PL in addition to enhancements in exposure stability. These results were ascribed in part to the passivation of defects in the perovskite top surface, accounting for the higher PL intensity, the slower PL relaxation, and for about 14 % of the ASE threshold decrease.https://www.mdpi.com/2073-4360/13/15/2574CsPbBr<sub>3</sub> perovskite QDsamplified spontaneous emission (ASE)light amplificationsurface passivationphotostability |
| spellingShingle | Saif M. H. Qaid Hamid M. Ghaithan Khulod K. AlHarbi Bandar Ali Al-Asbahi Abdullah S. Aldwayyan Enhancement of Light Amplification of CsPbBr<sub>3</sub> Perovskite Quantum Dot Films via Surface Encapsulation by PMMA Polymer Polymers CsPbBr<sub>3</sub> perovskite QDs amplified spontaneous emission (ASE) light amplification surface passivation photostability |
| title | Enhancement of Light Amplification of CsPbBr<sub>3</sub> Perovskite Quantum Dot Films via Surface Encapsulation by PMMA Polymer |
| title_full | Enhancement of Light Amplification of CsPbBr<sub>3</sub> Perovskite Quantum Dot Films via Surface Encapsulation by PMMA Polymer |
| title_fullStr | Enhancement of Light Amplification of CsPbBr<sub>3</sub> Perovskite Quantum Dot Films via Surface Encapsulation by PMMA Polymer |
| title_full_unstemmed | Enhancement of Light Amplification of CsPbBr<sub>3</sub> Perovskite Quantum Dot Films via Surface Encapsulation by PMMA Polymer |
| title_short | Enhancement of Light Amplification of CsPbBr<sub>3</sub> Perovskite Quantum Dot Films via Surface Encapsulation by PMMA Polymer |
| title_sort | enhancement of light amplification of cspbbr sub 3 sub perovskite quantum dot films via surface encapsulation by pmma polymer |
| topic | CsPbBr<sub>3</sub> perovskite QDs amplified spontaneous emission (ASE) light amplification surface passivation photostability |
| url | https://www.mdpi.com/2073-4360/13/15/2574 |
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