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Designing LiTaO₃:Ln³⁺,Eu³⁺ (Ln = Tb or Pr) perovskite dosimeter with excellent charge carrier storage capacity and stability for anti-counterfeiting and flexible X-ray imaging

Lyu, Tianshuai (author), Dorenbos, P. (author), Wei, Zhanhua (author)

Developing X-ray charged dosimeters with excellent charge carrier storage capacity and stability is challenging. Such energy storage dosimeters have fascinating use in developing novel applications, for instance, in radiation detection, advanced multimode anti-counterfeiting, and flexible X-ray imaging of curved objects. Herein, novel LiTaO...

journal article 2023

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Avoiding concentration quenching and self-absorption in Cs₄EuX₆ (X = Br, I) by Sm²⁺ doping

van Aarle, C. (author), Krämer, Karl W. (author), Dorenbos, P. (author)

The benefits of doping Cs₄EuBr₆ and Cs₄EuI₆ with Sm²⁺ are studied for near-infrared scintillator applications. It is shown that undoped Cs₄EuI₆ suffers from a high probability of self-absorption, which is almost completely absent in Cs₄EuI₆:2%...

journal article 2023

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Thermal quenching of lanthanide luminescence via charge transfer states in inorganic materials

Dorenbos, P. (author)

There are various routes of luminescence quenching such as multi-phonon relaxation from excited states to lower energy states, energy migration to killer sites, and radiation less relaxation to the ground state via the crossing point in a configurational coordinate diagram. In this work, we will consider and review quenching of lanthanide...

journal article 2022

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Characterisation of Sm²⁺-doped CsYbBr₃, CsYbI₃ and YbCl₂ for near-infrared scintillator application

van Aarle, C. (author), Krämer, Karl W. (author), Dorenbos, P. (author)

Fast energy transfer from Yb²⁺ to Sm²⁺ is a requirement when using Yb²⁺ as a sensitiser for Sm²⁺ emission for near-infrared scintillator applications. This cannot be achieved through dipole-dipole interactions due to the spin-forbidden nature of the involved Yb²⁺ transition, making the...

journal article 2022

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Temperature dependent scintillation properties and mechanisms of (PEA)₂PbBr₄ single crystals

van Blaaderen, J.J. (author), Maddalena, Francesco (author), Dang, Cuong (author), Birowosuto, Muhammad Danang (author), Dorenbos, P. (author)

In this work the scintillation properties of PEA₂PbBr₄ are studied as function of temperature, accessing the potential use of these materials for low temperature applications. The scintillation properties and mechanism have been studied using a combination of temperature dependent photoluminescence emission and...

journal article 2022

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VUV-UV-vis photoluminescence, X-ray radioluminescence and energy transfer dynamics of Ce³⁺ and Eu²⁺ in Sr₂MgSi₂O₇

Wen, Donghao (author), Li, Quanfeng (author), Ou, Yiyi (author), Yang, Yunlin (author), Qi, Zeming (author), Dorenbos, P. (author), Liang, Hongbin (author)

Ce³⁺ and Eu²⁺ doped and Ce³⁺-Eu²⁺ co-doped Sr₂MgSi₂O₇ phosphors are prepared via a high-temperature solid-state reaction technique. The synchrotron radiation vacuum ultraviolet-ultraviolet (VUV-UV) excitation and ultraviolet-visible (UV-vis) emission spectra of...

journal article 2022

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LiTaO₃:Bi³⁺,Tb³⁺,Ga³⁺,Ge⁴⁺: A Smart Perovskite with High Charge Carrier Storage Capacity for X-Ray Imaging, Stress Sensing, and Non-Real-Time Recording

Lyu, Tianshuai (author), Dorenbos, P. (author), Xiong, Puxian (author), Wei, Zhanhua (author)

Developing X-ray or UV-light charged storage and mechanoluminescence (ML) materials with high charge carrier storage capacity is challenging. Such materials have promising utilization in developing new applications, for example, in flexible X-ray imaging, stress sensing, or non-real-time recording. Herein, the study reports on such materials;...

journal article 2022

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Wide Range X-Ray to Infrared Photon Detection and Energy Storage in LiTaO₃:Bi³⁺,Dy³⁺ Perovskite

Lyu, Tianshuai (author), Dorenbos, P. (author), Li, Canhua (author), Wei, Zhanhua (author)

It is challenging to obtain a material that can detect photons ranging from X-rays to infrared light. Such materials have promising use to develop advanced applications like in information storage, anticounterfeiting, or X-ray imaging. This article reports on such a material; LiTaO₃:xBi³⁺,yDy³⁺ perovskite...

journal article 2022

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Vacuum-Referred Binding Energies of Bismuth and Lanthanide Levels in LiTaO₃ Perovskite: Toward Designing Energy Storage Phosphor for Anti-Counterfeiting, X-Ray Imaging, and Mechanoluminescence

Lyu, Tianshuai (author), Dorenbos, P. (author)

Discovering UV-light or X-ray charged afterglow and storage phosphors with high charge carrier storage capacity remains challenging. Herein, a method is proposed by combining vacuum referred binding energy (VRBE) diagram construction and optimization of dopants’ concentration and compound synthesis. The refined chemical shift model, optical...

journal article 2022

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Experimental and Theoretical Studies of the Site Occupancy and Luminescence of Ce³⁺in LiSr₄(BO₃)₃for Potential X-ray Detecting Applications

Yang, Yunlin (author), Lou, Bibo (author), Ou, Yiyi (author), Su, Fang (author), Ma, Chong Geng (author), Duan, Chang Kui (author), Dorenbos, P. (author), Liang, Hongbin (author)

Ce3+-doped LiSr4(BO3)3 phosphors have been prepared by a high-temperature solid-state reaction method, and structural refinement of the host compound has been performed. The excitation and emission spectra in the vacuum ultraviolet-ultraviolet-visible range at cryogenic temperatures reveal that Ce3+ ions preferentially occupy eight...

journal article 2022

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Unraveling electron liberation from Bi²⁺ for designing Bi³⁺-based afterglow phosphor for anti-counterfeiting and flexible X-ray imaging

Lyu, T. (author), Dorenbos, P. (author), Li, Canhua (author), Li, Silei (author), Xu, Jian (author), Wei, Zhanhua (author)

It is challenging to rational design persistent luminescence and storage phosphors with high storage capacity of electrons and holes after X-ray charging. Such phosphors have potential applications in anti-counterfeiting and X-ray imaging. Here we have combined vacuum referred binding energy diagram (VRBE) construction, photoluminescence...

journal article 2022

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Photoluminescence and excited states dynamics of Tm²⁺-doped CsCa(Cl/Br)₃ and CsCa(Br/I)₃ perovskites

Plokker, M.P. (author), Biner, D. A. (author), Dusoswa, N. (author), Dorenbos, P. (author), Krämer, K. W. (author), van der Kolk, E. (author)

In this study, we systematically vary the Cl/Br and Br/I ratios in CsCaX₃:Tm²⁺ (X = Cl, Br, I) and hereby gradually shift the positions of the Tm²⁺ 4f¹²5d¹-levels as relative to the two 4f¹³ levels. At low temperatures up to five distinct Tm²⁺ 4f¹²5d<sup>1...

journal article 2021

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Electronic structure of bi-activated luminescent compounds and pure bismuth photocatalytic compounds

Dorenbos, P. (author)

The trends in electronic structure of Bi3+ and Bi2+ as luminescent dopant in wide bandgap inorganic compounds and that of pure Bicompounds for photocatalytic splitting of water are explored by determination of vacuum referred electron binding energies. Spectroscopic data combined with the chemical shift model from the luminescence field and...

journal article 2021

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Blasse's Pandora's box

Dorenbos, P. (author)

Upon his retirement from science Blasse wrote a paper (Blasse, J. Lumin. 72-74 (1997) 129) addressing unsolved problems in explaining luminescence phenomena of classical phosphors. He used the metaphor of Pandora's box. A box full of disaster that should remain closed. Yet, Blasse did open that box and therewith spread the unsolved problems...

journal article 2021

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The role of Yb²⁺ as a scintillation sensitiser in the near-infrared scintillator CsBa₂I₅:Sm²⁺

van Aarle, C. (author), Krämer, Karl W. (author), Dorenbos, P. (author)

The feasiblity of using Yb²⁺ as a scintillation sensitiser for CsBa₂I₅:Sm²⁺ near-infrared scintillators has been assessed. CsBa₂I₅ samples with concentrations ranging from 0.3% to 2% Yb²⁺ and 0–1% Sm²⁺ have been studied. The scintillation properties have...

journal article 2021

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Experimental and numerical analysis of Tm²⁺ excited-states dynamics and luminescence in CaX₂ (X = Cl, Br, I)

Plokker, M.P. (author), van der Knijff, I.C. (author), de Wit, A.V. (author), Voet, B. (author), Woudstra, T. (author), Khanin, V. (author), Dorenbos, P. (author), van der Kolk, E. (author)

The prospect of using Tm²⁺-doped halides for luminescence solar concentrators (LSCs) requires a thorough understanding of the temperature dependent Tm²⁺ excited states dynamics that determines the internal quantum efficiency (QE) and thereby the efficiency of the LSC. In this study we investigated the dynamics in CaX<sub...

journal article 2021

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Engineering near-infrared emitting scintillators with efficient Eu²⁺ → Sm²⁺ energy transfer

Wolszczak, W.W. (author), Krämer, K. W. (author), Dorenbos, P. (author)

Recently, we proposed a concept for a new class of near infrared (NIR) scintillators by employing efficient Eu²⁺ → Sm²⁺ energy transfer. In this article we investigate the optical spectroscopy of Sm²⁺ in BaBrI, CsSrI₃, and CsBa₂I₅ halide hosts. A criterion was derived for fast...

journal article 2020

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Vacuum-Referred Binding Energies of Bismuth and Lanthanide Levels in ARE(Si,Ge)O₄ (A = Li, Na; RE = Y, Lu): Toward Designing Charge-Carrier-Trapping Processes for Energy Storage

Lyu, T. (author), Dorenbos, P. (author)

Developing a feasible design principle for solid-state materials for persistent luminescence and storage phosphors with high charge carrier storage capacity remains a crucial challenge. Here we report a methodology for such rational design via vacuum referred binding energy (VRBE) diagram aided band structure engineering and crystal synthesis...

journal article 2020

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[INVITED] Improved parameters for the lanthanide 4f^q and 4f^q−15d curves in HRBE and VRBE schemes that takes the nephelauxetic effect into account

Dorenbos, P. (author)

In first approximation the binding of an electron in lanthanide 4f^q ground states changes with q in a characteristic zigzag shape that is independent on type of compound. Those shapes have been parameterized in past publications and are used to construct host referred binding energy (HRBE) or vacuum referred binding energy (VRBE)...

journal article 2020

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Site Occupancies, VUV-UV-vis Photoluminescence, and X-ray Radioluminescence of Eu²⁺-Doped RbBaPO₄

Zhou, Rongfu (author), Ma, Fengkai (author), Su, Fang (author), Ou, Yiyi (author), Qi, Zeming (author), Zhang, Jianhui (author), Huang, Yan (author), Dorenbos, P. (author), Liang, Hongbin (author)

RbBaPO4:Eu2+ phosphors have been prepared by a high-temperature solid-state reaction method, and the structure was determined by Rietveld refinement based on powder X-ray diffraction (P-XRD) data. Their VUV-UV-vis photoluminescence properties are systematically investigated with three objectives: (1) based on low-temperature spectra, we...

journal article 2020