Substrate and Excitation Intensity Dependence of Saturable Absorption in Perovskite Quantum Dot Films
Saturable absorption in perovskite quantum dot (PQD) films, leading to saturation in photoluminescence (PL), is reported. PL of drop-casting films was used to probe how excitation intensity and host–substrate influence the growth of PL intensity. The PQD films were deposited on single-crystal GaAs,...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/5/871 |
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| author | Mithun Bhowmick Bruno Ullrich Madeline Murchland Xuan Zhou Chari Ramkumar |
| author_facet | Mithun Bhowmick Bruno Ullrich Madeline Murchland Xuan Zhou Chari Ramkumar |
| author_sort | Mithun Bhowmick |
| collection | DOAJ |
| description | Saturable absorption in perovskite quantum dot (PQD) films, leading to saturation in photoluminescence (PL), is reported. PL of drop-casting films was used to probe how excitation intensity and host–substrate influence the growth of PL intensity. The PQD films were deposited on single-crystal GaAs, InP, Si wafers and glass. Saturable absorption was confirmed through PL saturation in all films, with different excitation intensity thresholds, suggesting strong substrate-dependent optical properties, resulting from absorption nonlinearities in the system. The observations extend our former studies (Appl. Phys. Lett., 2021, 119, 19, 192103), wherein we pointed out that the PL saturation in QDs can be used to create all-optical switches in combination with a bulk semiconductor host. |
| first_indexed | 2024-03-11T07:15:56Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T07:15:56Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-ce5ebd741f404eb0a11637f46625f6762023-11-17T08:17:40ZengMDPI AGNanomaterials2079-49912023-02-0113587110.3390/nano13050871Substrate and Excitation Intensity Dependence of Saturable Absorption in Perovskite Quantum Dot FilmsMithun Bhowmick0Bruno Ullrich1Madeline Murchland2Xuan Zhou3Chari Ramkumar4Department of Mathematical and Physical Sciences, Miami University, 4200 N University Blvd., Middletown, OH 45042, USAUllrich Photonics LLC, Manistique, MI 49854, USADepartment of Geology and Environmental Science, Miami University, 250 S Patterson Ave., Oxford, OH 45056, USADepartment of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USADepartment of Physics, Geology & Engineering Technology, Northern Kentucky University, Nunn Drive, Highland Heights, KY 41099, USASaturable absorption in perovskite quantum dot (PQD) films, leading to saturation in photoluminescence (PL), is reported. PL of drop-casting films was used to probe how excitation intensity and host–substrate influence the growth of PL intensity. The PQD films were deposited on single-crystal GaAs, InP, Si wafers and glass. Saturable absorption was confirmed through PL saturation in all films, with different excitation intensity thresholds, suggesting strong substrate-dependent optical properties, resulting from absorption nonlinearities in the system. The observations extend our former studies (Appl. Phys. Lett., 2021, 119, 19, 192103), wherein we pointed out that the PL saturation in QDs can be used to create all-optical switches in combination with a bulk semiconductor host.https://www.mdpi.com/2079-4991/13/5/871perovskitequantum dotsaturable absorberphotoluminescence |
| spellingShingle | Mithun Bhowmick Bruno Ullrich Madeline Murchland Xuan Zhou Chari Ramkumar Substrate and Excitation Intensity Dependence of Saturable Absorption in Perovskite Quantum Dot Films Nanomaterials perovskite quantum dot saturable absorber photoluminescence |
| title | Substrate and Excitation Intensity Dependence of Saturable Absorption in Perovskite Quantum Dot Films |
| title_full | Substrate and Excitation Intensity Dependence of Saturable Absorption in Perovskite Quantum Dot Films |
| title_fullStr | Substrate and Excitation Intensity Dependence of Saturable Absorption in Perovskite Quantum Dot Films |
| title_full_unstemmed | Substrate and Excitation Intensity Dependence of Saturable Absorption in Perovskite Quantum Dot Films |
| title_short | Substrate and Excitation Intensity Dependence of Saturable Absorption in Perovskite Quantum Dot Films |
| title_sort | substrate and excitation intensity dependence of saturable absorption in perovskite quantum dot films |
| topic | perovskite quantum dot saturable absorber photoluminescence |
| url | https://www.mdpi.com/2079-4991/13/5/871 |
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