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Testa M, De Santis A, Tinti G, Paoloni A, Papalino G, Felici G, Chubinidze Z, Matteocci F, Auf der Maur M, Rizzato S, Lo Presti L, Viola I, Morganti S, Rovelli C. Direct detection of minimum ionizing charged particles in a perovskite single crystal detector with single particle sensitivity. NANOSCALE 2024; 16:12918-12922. [PMID: 38910525 DOI: 10.1039/d4nr01556h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/25/2024]
Abstract
We report the detection of high energy electrons of some hundreds of MeV, crossing a methylammonium lead bromide single crystal device with sensitivity down to a single electron. In the device, the released energy is close to the energy released by minimum-ionizing particles. This is the first demonstration of a perovskite-based device that can be used for tracking and counting minimum-ionizing charged particles. The device reaches single particle sensitivity with a low bias voltage of 5 V. It also shows a good linearity of the response as a function of the number of electrons in a dynamic range of approximately 104.
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Affiliation(s)
- Marianna Testa
- INFN - Laboratori Nazionali di Frascati, Via E. Fermi 54, Frascati, Italy.
| | - Antonio De Santis
- INFN - Laboratori Nazionali di Frascati, Via E. Fermi 54, Frascati, Italy.
| | - Gemma Tinti
- INFN - Laboratori Nazionali di Frascati, Via E. Fermi 54, Frascati, Italy.
| | - Alessandro Paoloni
- INFN - Laboratori Nazionali di Frascati, Via E. Fermi 54, Frascati, Italy.
| | - Giuseppe Papalino
- INFN - Laboratori Nazionali di Frascati, Via E. Fermi 54, Frascati, Italy.
| | - Giulietto Felici
- INFN - Laboratori Nazionali di Frascati, Via E. Fermi 54, Frascati, Italy.
| | - Zaza Chubinidze
- INFN - Laboratori Nazionali di Frascati, Via E. Fermi 54, Frascati, Italy.
| | - Fabio Matteocci
- CHOSE Centre for Hybrid and Organic Solar Energy, Department of Electronic Engineering, University of Rome "Tor Vergata" Address, 00133 Rome, Italy
| | - Matthias Auf der Maur
- CHOSE Centre for Hybrid and Organic Solar Energy, Department of Electronic Engineering, University of Rome "Tor Vergata" Address, 00133 Rome, Italy
| | - Silvia Rizzato
- Università degli Studi di Milano, Department of Chemistry, Via Golgi 19, 20133 Milano, Italy
| | - Leonardo Lo Presti
- Università degli Studi di Milano, Department of Chemistry, Via Golgi 19, 20133 Milano, Italy
| | - Ilenia Viola
- CNR-NANOTEC, Istituto di Nanotecnologia c/o Dip. Fisica, Università "La Sapienza", Piazzale A. Moro 2, 00185 - Roma, Italy
| | - Silvio Morganti
- INFN Sez. di Roma, c/o Department of Physics Sapienza Università di Roma, P.le Aldo Moro 2, 00185 Rome, Italy
| | - Chiara Rovelli
- INFN Sez. di Roma, c/o Department of Physics Sapienza Università di Roma, P.le Aldo Moro 2, 00185 Rome, Italy
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Kudrevicius L, Jaselskė E, Stankus G, Arslonova S, Adliene D. Post-Irradiation Behavior of Colored PVA-Based Films Containing Ag Nanoparticles as Radiation Detectors/Exposure Indicators. Gels 2024; 10:290. [PMID: 38786207 PMCID: PMC11121668 DOI: 10.3390/gels10050290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 04/18/2024] [Accepted: 04/22/2024] [Indexed: 05/25/2024] Open
Abstract
Ionizing radiation covers a broad spectrum of applications. Since radioactive/radiation pollution is directly related to radiation risk, radiation levels should be strictly controlled. Different detection methods can be applied for radiation registration and monitoring. In this paper, radiation-induced variations in the optical properties of silver-enriched PVA-based hydrogel films with and without azo dye (Toluidine blue O, TBO, and Methyl red, MR) additives were investigated, and the feasibility of these free-standing films to serve as radiation detectors/exposure indicators was assessed. AgNO3 admixed with PVA gel was used as a source for the radiation-induced synthesis of silver nanoparticles (AgNPs) in irradiated gel films. Three types of sensors were prepared: silver-enriched PVA films containing a small amount of glycerol (AgPVAGly); silver-enriched PVA films with toluidine blue adducts (AgPVAGlyTBO); and silver-enriched PVA films with methyl red additives (AgPVAGlyMR). The selection of TBO and MR was based on their sensitivity to irradiation. The irradiation of the samples was performed in TrueBeam2.1 (VARIAN) using 6 MeV photons. Different doses up to 10 Gy were delivered to the films. The sensitivity of the films was assessed by analyzing the characteristic UV-Vis absorbance peaks on the same day as irradiation and 7, 30, 45, 90, and 180 days after irradiation. It was found that the addition of azo dyes led to an enhanced radiation sensitivity of the AgNPs containing films (0.6 Gy-1 for AgPVAGlyTBO and 0.4 Gy-1 for AgPVAGlyMR) irradiated with <2 Gy doses, indicating their applicability as low-dose exposure indicators. The irradiated films were less sensitive to higher doses. Almost no dose fading was detected between the 7th and 45th day after irradiation. Based on the obtained results, competing AgNP formation and color-bleaching effects in the AgPVAGly films with dye additives are discussed.
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Affiliation(s)
- Linas Kudrevicius
- Physics Department, Kaunas University of Technology, 51368 Kaunas, Lithuania;
| | - Evelina Jaselskė
- Neurosurgery Department, Lithuanian University of Health Sciences, 44307 Kaunas, Lithuania
| | - Gabrielius Stankus
- Physics Department, Kaunas University of Technology, 51368 Kaunas, Lithuania;
| | - Shirin Arslonova
- Tashkent City Branch of Republican Specialized Scientific-Practical Medical Centre of Oncology and Radiology, Boguston Str. 1, Tashkent P.O. Box 100070, Uzbekistan
| | - Diana Adliene
- Physics Department, Kaunas University of Technology, 51368 Kaunas, Lithuania;
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Wierzbowska M, Meléndez JJ. Exploring Epitaxial Structures for Electrically Pumped Perovskite Lasers: A Study of CsPb(Br,I) 3 Based on the Ab Initio Bethe-Salpeter Equation. MATERIALS (BASEL, SWITZERLAND) 2024; 17:427. [PMID: 38255596 PMCID: PMC11154405 DOI: 10.3390/ma17020427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/07/2023] [Accepted: 01/06/2024] [Indexed: 01/24/2024]
Abstract
Halide perovskites are widely used as components of electronic and optoelectronic devices such as solar cells, light-emitting diodes (LEDs), optically pumped lasers, field-effect transistors, photodetectors, and γ-detectors. Despite this wide range of applications, the construction of an electrically pumped perovskite laser remains challenging. In this paper, we numerically justify that mixing two perovskite compounds with different halide elements can lead to optical properties suitable for electrical pumping. As a reference, the chosen model material was CsPbBr3, whose performance as a part of lasers has been widely recognised, with some Br atoms substituted by I at specific sites. In particular, a strong enhancement of the low-energy absorption peaks has been obtained using the ab initio Bethe-Salpeter equation. Based on these results, we propose specific architectures of ordered doping that could be realised by epitaxial growth. Efficient light emission from the bottom of the conduction band is expected.
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Affiliation(s)
- Małgorzata Wierzbowska
- Institute of High Pressure Physics Polish Academy of Sciences, Sokolowska 29/37, 01-142 Warsaw, Poland
| | - Juan J. Meléndez
- Department of Physics, University of Extremadura, Avda. de Elvas, s/n, 06006 Badajoz, Spain;
- Institute for Advanced Scientific Computing of Extremadura (ICCAEx), Avda. de Elvas, s/n, 06006 Badajoz, Spain
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