Optical and scintillation properties of record-efficiency CdTe nanoplatelets toward radiation detection applications
- Author
- Abhinav Anand, Matteo L. Zaffalon, Francesca Cova, Valerio Pinchetti, Ali Khan (UGent) , Francesco Carulli, Rosaria Brescia, Francesco Meinardi, Iwan Moreels (UGent) and Sergio Brovelli
- Organization
- Project
-
- PHOCONA (Photonics in Flatland: Band Structure Engineering of 2D Excitons in Fluorescent Colloidal Nanomaterials)
- Abstract
- Colloidal CdTe nanoplatelets featuring a large absorption coefficient and ultrafast tunable luminescence coupled with heavy-metal-based composition present themselves as highly desirable candidates for radiation detection technologies. Historically, however, these nanoplatelets have suffered from poor emission efficiency, hindering progress in exploring their technological potential. Here, we report the synthesis of CdTe nanoplatelets possessing a record emission efficiency of 9%. This enables us to investigate their fundamental photophysics using ultrafast transient absorption, temperature-controlled photoluminescence, and radioluminescence measurements, elucidating the origins of exciton-and defect-related phenomena under both optical and ionizing excitation. For the first time in CdTe nanoplatelets, we report the cumulative effects of a giant oscillator strength transition and exciton fine structure. Simultaneously, thermally stimulated luminescence measurements reveal the presence of both shallow and deep trap states and allow us to disclose the trapping and detrapping dynamics and their influence on the scintillation properties.
- Keywords
- Mechanical Engineering, Condensed Matter Physics, General Materials Science, General Chemistry, Bioengineering, CdTe nanoplatelets, GOST, exciton fine structure, scintillation, EXCITON FINE-STRUCTURE, SURFACE QUANTUM-WELLS, AUGER RECOMBINATION, ENERGY-TRANSFER, SEMICONDUCTOR, NANOCRYSTALS, EMISSION, DYNAMICS, CADMIUM, DOTS
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01GK023AECFN4T282RWXAH0CKQ
- MLA
- Anand, Abhinav, et al. “Optical and Scintillation Properties of Record-Efficiency CdTe Nanoplatelets toward Radiation Detection Applications.” NANO LETTERS, vol. 22, no. 22, 2022, pp. 8900–07, doi:10.1021/acs.nanolett.2c02975.
- APA
- Anand, A., Zaffalon, M. L., Cova, F., Pinchetti, V., Khan, A., Carulli, F., … Brovelli, S. (2022). Optical and scintillation properties of record-efficiency CdTe nanoplatelets toward radiation detection applications. NANO LETTERS, 22(22), 8900–8907. https://doi.org/10.1021/acs.nanolett.2c02975
- Chicago author-date
- Anand, Abhinav, Matteo L. Zaffalon, Francesca Cova, Valerio Pinchetti, Ali Khan, Francesco Carulli, Rosaria Brescia, Francesco Meinardi, Iwan Moreels, and Sergio Brovelli. 2022. “Optical and Scintillation Properties of Record-Efficiency CdTe Nanoplatelets toward Radiation Detection Applications.” NANO LETTERS 22 (22): 8900–8907. https://doi.org/10.1021/acs.nanolett.2c02975.
- Chicago author-date (all authors)
- Anand, Abhinav, Matteo L. Zaffalon, Francesca Cova, Valerio Pinchetti, Ali Khan, Francesco Carulli, Rosaria Brescia, Francesco Meinardi, Iwan Moreels, and Sergio Brovelli. 2022. “Optical and Scintillation Properties of Record-Efficiency CdTe Nanoplatelets toward Radiation Detection Applications.” NANO LETTERS 22 (22): 8900–8907. doi:10.1021/acs.nanolett.2c02975.
- Vancouver
- 1.Anand A, Zaffalon ML, Cova F, Pinchetti V, Khan A, Carulli F, et al. Optical and scintillation properties of record-efficiency CdTe nanoplatelets toward radiation detection applications. NANO LETTERS. 2022;22(22):8900–7.
- IEEE
- [1]A. Anand et al., “Optical and scintillation properties of record-efficiency CdTe nanoplatelets toward radiation detection applications,” NANO LETTERS, vol. 22, no. 22, pp. 8900–8907, 2022.
@article{01GK023AECFN4T282RWXAH0CKQ,
abstract = {{Colloidal CdTe nanoplatelets featuring a large absorption coefficient and ultrafast tunable luminescence coupled with heavy-metal-based composition present themselves as highly desirable candidates for radiation detection technologies. Historically, however, these nanoplatelets have suffered from poor emission efficiency, hindering progress in exploring their technological potential. Here, we report the synthesis of CdTe nanoplatelets possessing a record emission efficiency of 9%. This enables us to investigate their fundamental photophysics using ultrafast transient absorption, temperature-controlled photoluminescence, and radioluminescence measurements, elucidating the origins of exciton-and defect-related phenomena under both optical and ionizing excitation. For the first time in CdTe nanoplatelets, we report the cumulative effects of a giant oscillator strength transition and exciton fine structure. Simultaneously, thermally stimulated luminescence measurements reveal the presence of both shallow and deep trap states and allow us to disclose the trapping and detrapping dynamics and their influence on the scintillation properties.}},
author = {{Anand, Abhinav and Zaffalon, Matteo L. and Cova, Francesca and Pinchetti, Valerio and Khan, Ali and Carulli, Francesco and Brescia, Rosaria and Meinardi, Francesco and Moreels, Iwan and Brovelli, Sergio}},
issn = {{1530-6984}},
journal = {{NANO LETTERS}},
keywords = {{Mechanical Engineering,Condensed Matter Physics,General Materials Science,General Chemistry,Bioengineering,CdTe nanoplatelets,GOST,exciton fine structure,scintillation,EXCITON FINE-STRUCTURE,SURFACE QUANTUM-WELLS,AUGER RECOMBINATION,ENERGY-TRANSFER,SEMICONDUCTOR,NANOCRYSTALS,EMISSION,DYNAMICS,CADMIUM,DOTS}},
language = {{eng}},
number = {{22}},
pages = {{8900--8907}},
title = {{Optical and scintillation properties of record-efficiency CdTe nanoplatelets toward radiation detection applications}},
url = {{http://doi.org/10.1021/acs.nanolett.2c02975}},
volume = {{22}},
year = {{2022}},
}
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