High speed multichannel time-correlated single photon counting electronics based on SiGe integrated time-to-digital converters

Wahl, Michael; Röhlicke, Tino; Rahn, Hans-Jürgen; Buschmann, Volker; Bertone, Nick; Kell, Gerald

doi:10.1117/12.2018039

Cited by 3 publications

(3 citation statements)

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“…The time correlation is provided by a PicoHarp 300 correlator (PicoQuant) triggered by a laser pulse. To avoid the pile-up effect, only 5% of the detected photon count was used to build the histograms …”

Section: Experimental Setup Descriptionmentioning

confidence: 99%

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Influence of the Bismuth Content on the Optical Properties and Photoluminescence Decay Time in GaSbBi Films

Smołka,

Rygała,

Hilska

et al. 2023

ACS Omega

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We report the optical properties of GaSbBi layers grown on GaSb (100) substrates with different bismuth contents of 5.8 and 8.0% Bi. Fouriertransform photoluminescence spectra were determined to identify the band gaps of the studied materials. Further temperature-and power-dependent photoluminescence measurements indicated the presence of localized states connected to bismuth clustering. Finally, time-resolved photoluminescence measurements based on singlephoton counting allowed the determination of characteristic photoluminescence decay time constants. Because of the increasing bismuth content and clustering effects, an increase in the time constant was observed.

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Section: Experimental Setup Descriptionmentioning

confidence: 99%

“…To avoid the pile-up effect, only 5% of the detected photon count was used to build the histograms. 17 …”

Section: Experimental Setup Descriptionmentioning

confidence: 99%

Influence of the Bismuth Content on the Optical Properties and Photoluminescence Decay Time in GaSbBi Films

Smołka,

Rygała,

Hilska

et al. 2023

ACS Omega

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“…Being careful to account for dark count rates, taking care to avoid pile-up from prior excitation events, and implementing other best practices of PL decay measurement, − some perovskite samples excited under low fluence do indeed show nearly textbook first-order decays. , However, many other samples show more complicated PL kinetics, even in the low-level injection regime. , As discussed in the SI section I, even in state-of-the-art perovskite compositions for photovoltaics, bimolecular recombination kinetics only become significant at CW excitation powers ∼a few mW/cm 2 (or fast pulsed fluences of >10 11 photons/pulse/cm 2 ) (Figures S1–S5, Tables S2–S4), and Auger rates only become significant at CW excitation powers exceeding ∼100 W/cm 2 (or fast pulsed fluences >10 14 photons/pulse/cm 2 ) . Thus, at lower powers/fluences we need to look to explanations other than higher-order kinetics to explain the observed non-single exponential carrier recombination dynamics.…”

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confidence: 99%

Interpreting Halide Perovskite Semiconductor Photoluminescence Kinetics

Taddei,

Jariwala,

Westbrook

et al. 2024

ACS Energy Lett.

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Drawing from both experimental data and simulation, we highlight best practices for fitting time-resolved photoluminescence (TRPL) decays of halide perovskite semiconductors, which are now widely studied for applications in photovoltaics and light-emitting diodes (LEDs). First, at low excitation intensities, high-quality perovskites often show pseudo-first-order kinetics, consistent with classic minority carrier lifetimes. Second, multiexponential decays, frequently observed at low excitation intensities, often have significant contributions from spatial heterogeneity. We recommend fitting such decays with stretched exponentials, where the stretching factor (β) can be used to characterize the heterogeneity of the local lifetime distribution. Third, PL decay kinetics can depend on the excitation wavelength. We discuss how penetration depth, carrier diffusion, and surface recombination affect measurements and make recommendations for choosing experimental parameters suited to the question at hand. Accounting for these factors will provide a more reliable and physical interpretation of carrier recombination and better understanding of nonradiative losses in perovskite semiconductors.

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Modern TCSPC Electronics: Principles and Acquisition Modes

Wahl

2014

Springer Series on Fluorescence

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High speed multichannel time-correlated single photon counting electronics based on SiGe integrated time-to-digital converters

Cited by 3 publications

References 0 publications

Influence of the Bismuth Content on the Optical Properties and Photoluminescence Decay Time in GaSbBi Films

Influence of the Bismuth Content on the Optical Properties and Photoluminescence Decay Time in GaSbBi Films

Interpreting Halide Perovskite Semiconductor Photoluminescence Kinetics

Modern TCSPC Electronics: Principles and Acquisition Modes

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