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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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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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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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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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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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Detecting telecom single photons with 99.5 - 2.07 + 0.5 % system detection efficiency and high time resolution

Chang, J. (author), Los, J. W.N. (author), Tenorio Pearl, J.O. (author), Noordzij, N. (author), Gourgues, R.B.M. (author), Guardiani, A. (author), Zichi, J. R. (author), Pereira, S.F. (author), Urbach, Paul (author), Zwiller, V. (author), Dorenbos, S.N. (author), Esmaeil Zadeh, I.Z. (author)

Single photon detectors are indispensable tools in optics, from fundamental measurements to quantum information processing. The ability of superconducting nanowire single photon detectors (SNSPDs) to detect single photons with unprecedented efficiency, short dead time, and high time resolution over a large frequency range enabled major...

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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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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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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Superconducting nanowire single-photon detectors: A perspective on evolution, state-of-the-art, future developments, and applications

Esmaeil Zadeh, I.Z. (author), Chang, J. (author), Los, Johannes W.N. (author), Gyger, Samuel (author), Elshaari, Ali W. (author), Steinhauer, Stephan (author), Dorenbos, S.N. (author), Zwiller, Val (author)

Two decades after their demonstration, superconducting nanowire single-photon detectors (SNSPDs) have become indispensable tools for quantum photonics as well as for many other photon-starved applications. This invention has not only led to a burgeoning academic field with a wide range of applications but also triggered industrial efforts....

journal article 2021

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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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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

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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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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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Persistent luminescence excitation spectroscopy of BaAl₂O₄:Eu²⁺,Dy³⁺

Malkamäki, Marja (author), bos, A.J.J. (author), Dorenbos, P. (author), Lastusaari, Mika (author), Rodrigues, Lucas C.V. (author), Swart, Hendrik C. (author), Hölsä, Jorma (author)

BaAl₂O₄:Eu²⁺,Dy³⁺ is related, both by structure and luminescence, to one of the best persistent luminescent phosphors, SrAl₂O₄:Eu²⁺,Dy³⁺. At room temperature (RT), the green persistent emission of BaAl₂O₄:Eu²⁺,Dy<sup>3+<...

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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Towards information storage by designing both electron and hole detrapping processes in bismuth and lanthanide-doped LiRE(Si,Ge)O₄ (RE = Y, Lu) with high charge carrier storage capacity

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

Guided by vacuum referred binding energy (VRBE) diagrams, both the trapping and detrapping processes of electrons and holes are explored in the bismuth and lanthanide-doped LiRE(Si,Ge)O₄ (RE = Y, Lu) family of compounds. The Tm³⁺ electron trap has been combined with the deep hole traps of Ln³⁺ (Ln = Ce, Tb, or...

journal article 2020

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Proceedings of SPIE: Wavelength-resolved Purcell enhancement of PbS/CdS quantum dots measured on a chip-based platform

Elsinger, Lukas (author), Gourgues, R.B.M. (author), Esmaeil Zadeh, I.Z. (author), Maes, Jorick (author), Guardiani, A. (author), Bulgarini, G. (author), Pereira, S.F. (author), Dorenbos, S.N. (author), Zwiller, Val (author)

Future quantum optical networks will require an integrated solution to multiplex suitable sources and detectors on a low-loss platform. Here we combined superconducting single-photon detectors with colloidal PbS/CdS quantum dots (QDs) and low-loss silicon nitride passive photonic components to show their combined operation at cryogenic...

conference paper 2020

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Efficient Single-Photon Detection with 7.7 ps Time Resolution for Photon-Correlation Measurements

Esmaeil Zadeh, I.Z. (author), Chang, J. (author), Van Staaden, Yuri J. (author), Swens, Jeroen P.E. (author), Dobrovolskiy, S.M. (author), Schaart, D.R. (author), Pereira, S.F. (author), Zwiller, Val (author), Dorenbos, S.N. (author)

A broad range of scientific and industrial disciplines require precise optical measurements at very low light levels. Single-photon detectors combining high efficiency and high time resolution are pivotal in such experiments. By using relatively thick films of NbTiN (8-11 nm) and improving the pattern fidelity of the nanostructure of the...

journal article 2020

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Machine learning 5d-level centroid shift of Ce³⁺inorganic phosphors

Zhuo, Ya (author), Hariyani, Shruti (author), You, Shihai (author), Dorenbos, P. (author), Brgoch, Jakoah (author)

Information on the 5d level centroid shift (ϵc) of rare-earth ions is critical for determining the chemical shift and the Coulomb repulsion parameter as well as predicting the luminescence and thermal response of rare-earth substituted inorganic phosphors. The magnitude of ϵc depends on the binding strength between the rare-earth ion and its...

journal article 2020