Stable and bright commercial CsPbBr₃ quantum dot-resin layers for apparent X-ray imaging screen
CsPbBr3 quantum dots (QDs) have recently gained much interest due to their excellent optical and scintillation properties and their potential for X-ray imaging applications. In this study, we blended CsPbBr3 QDs with resin at different QD concentrations to achieve thick films and to protect the CsPb...
| Main Authors: | , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/162165 |
| _version_ | 1826115283871334400 |
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| author | Maddalena, Francesco Witkowski, Marcin E. Makowski, Michal Bachiri, Abdellah Mahler, Benoit Wong, Ying-Chieh Chua, Eric Cheng Yi Lee, Jia Xing Drozdowski, Winicjusz Springham, Stuart Victor Dujardin, Christophe Muhammad Danang Birowosuto Dang, Cuong |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Maddalena, Francesco Witkowski, Marcin E. Makowski, Michal Bachiri, Abdellah Mahler, Benoit Wong, Ying-Chieh Chua, Eric Cheng Yi Lee, Jia Xing Drozdowski, Winicjusz Springham, Stuart Victor Dujardin, Christophe Muhammad Danang Birowosuto Dang, Cuong |
| author_sort | Maddalena, Francesco |
| collection | NTU |
| description | CsPbBr3 quantum dots (QDs) have recently gained much interest due to their excellent optical and scintillation properties and their potential for X-ray imaging applications. In this study, we blended CsPbBr3 QDs with resin at different QD concentrations to achieve thick films and to protect the CsPbBr3 QDs from environmental moisture. Then, their scintillation properties are investigated and compared to the traditional commercial scintillators, CsI:Tl microcolumns, and Gadox layers. The CsPbBr3 QD-resin sheets show a high light yield of up to 21 500 photons/MeV at room temperature and a relatively small variation in light yield across a wide temperature range. In addition, the CsPbBr3 QD-resin sheets feature a small scintillation afterglow. The CsPbBr3 QD-resin sheets show a negligible trap density for the concentration below 50% weight, indicating that traps might arise from the aggregation of the QDs. The CsPbBr3 QD-resin sheets are also very stable at low irradiation intensities and relatively stable at higher intensities, with higher CsPbBr3 QD concentrations being more stable. Gamma-ray-excited-time-resolved emission measurements at 662 keV showed that the CsPbBr3 QD-resin sheets have an average scintillation decay time between 108 and 176 ns, which are still 10 000 and 6000 times faster than CsI:Tl and Gadox, respectively. Imaging tests show that the CsPbBr3 QD-resin sheets have a mean transfer function of 50% at 2 lp/mm and 20% at 4 lp/mm, comparable to that of commercial Gadox layers. This feature makes CsPbBr3 QD-resin sheets a good candidate for the low-cost, flexible X-ray imaging screens and γ-ray applications. |
| first_indexed | 2024-10-01T03:52:35Z |
| format | Journal Article |
| id | ntu-10356/162165 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:52:35Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1621652022-10-06T08:01:13Z Stable and bright commercial CsPbBr₃ quantum dot-resin layers for apparent X-ray imaging screen Maddalena, Francesco Witkowski, Marcin E. Makowski, Michal Bachiri, Abdellah Mahler, Benoit Wong, Ying-Chieh Chua, Eric Cheng Yi Lee, Jia Xing Drozdowski, Winicjusz Springham, Stuart Victor Dujardin, Christophe Muhammad Danang Birowosuto Dang, Cuong School of Electrical and Electronic Engineering CNRS International NTU THALES Research Alliances Engineering::Electrical and electronic engineering Perovskite Quantum Dot CsPbBr3 quantum dots (QDs) have recently gained much interest due to their excellent optical and scintillation properties and their potential for X-ray imaging applications. In this study, we blended CsPbBr3 QDs with resin at different QD concentrations to achieve thick films and to protect the CsPbBr3 QDs from environmental moisture. Then, their scintillation properties are investigated and compared to the traditional commercial scintillators, CsI:Tl microcolumns, and Gadox layers. The CsPbBr3 QD-resin sheets show a high light yield of up to 21 500 photons/MeV at room temperature and a relatively small variation in light yield across a wide temperature range. In addition, the CsPbBr3 QD-resin sheets feature a small scintillation afterglow. The CsPbBr3 QD-resin sheets show a negligible trap density for the concentration below 50% weight, indicating that traps might arise from the aggregation of the QDs. The CsPbBr3 QD-resin sheets are also very stable at low irradiation intensities and relatively stable at higher intensities, with higher CsPbBr3 QD concentrations being more stable. Gamma-ray-excited-time-resolved emission measurements at 662 keV showed that the CsPbBr3 QD-resin sheets have an average scintillation decay time between 108 and 176 ns, which are still 10 000 and 6000 times faster than CsI:Tl and Gadox, respectively. Imaging tests show that the CsPbBr3 QD-resin sheets have a mean transfer function of 50% at 2 lp/mm and 20% at 4 lp/mm, comparable to that of commercial Gadox layers. This feature makes CsPbBr3 QD-resin sheets a good candidate for the low-cost, flexible X-ray imaging screens and γ-ray applications. Ministry of Education (MOE) The authors acknowledge financial supports from the Singapore Ministry of Education (MOE2019-T1-002-087) and Thales-CINTRA Funding. 2022-10-06T08:01:13Z 2022-10-06T08:01:13Z 2021 Journal Article Maddalena, F., Witkowski, M. E., Makowski, M., Bachiri, A., Mahler, B., Wong, Y., Chua, E. C. Y., Lee, J. X., Drozdowski, W., Springham, S. V., Dujardin, C., Muhammad Danang Birowosuto & Dang, C. (2021). Stable and bright commercial CsPbBr₃ quantum dot-resin layers for apparent X-ray imaging screen. ACS Applied Materials & Interfaces, 13(49), 59450-59459. https://dx.doi.org/10.1021/acsami.1c16171 1944-8244 https://hdl.handle.net/10356/162165 10.1021/acsami.1c16171 34855346 2-s2.0-85120886940 49 13 59450 59459 en MOE2019-T1-002-087 ACS Applied Materials & Interfaces © 2021 American Chemical Society. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Perovskite Quantum Dot Maddalena, Francesco Witkowski, Marcin E. Makowski, Michal Bachiri, Abdellah Mahler, Benoit Wong, Ying-Chieh Chua, Eric Cheng Yi Lee, Jia Xing Drozdowski, Winicjusz Springham, Stuart Victor Dujardin, Christophe Muhammad Danang Birowosuto Dang, Cuong Stable and bright commercial CsPbBr₃ quantum dot-resin layers for apparent X-ray imaging screen |
| title | Stable and bright commercial CsPbBr₃ quantum dot-resin layers for apparent X-ray imaging screen |
| title_full | Stable and bright commercial CsPbBr₃ quantum dot-resin layers for apparent X-ray imaging screen |
| title_fullStr | Stable and bright commercial CsPbBr₃ quantum dot-resin layers for apparent X-ray imaging screen |
| title_full_unstemmed | Stable and bright commercial CsPbBr₃ quantum dot-resin layers for apparent X-ray imaging screen |
| title_short | Stable and bright commercial CsPbBr₃ quantum dot-resin layers for apparent X-ray imaging screen |
| title_sort | stable and bright commercial cspbbr₃ quantum dot resin layers for apparent x ray imaging screen |
| topic | Engineering::Electrical and electronic engineering Perovskite Quantum Dot |
| url | https://hdl.handle.net/10356/162165 |
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