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helios femtosecond transient absorption spectrometer  (Ultrafast Systems LLC)

 
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    Ultrafast Systems LLC helios femtosecond transient absorption spectrometer
    Helios Femtosecond Transient Absorption Spectrometer, supplied by Ultrafast Systems LLC, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/helios+femtosecond+transient+absorption+spectrometer/femtosecond+transient+absorption+spectrometer+helios+ir/pmc11783092-42-1-6
    Average 90 stars, based on 1 article reviews
    helios femtosecond transient absorption spectrometer - by Bioz Stars, 2026-11
    90/100 stars

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    Related Articles

    other:

    Article Title: In-situ growth of low-dimensional perovskite-based insular nanocrystals for highly efficient light emitting diodes.
    Article Snippet: TA was measured using a HELIOS femtosecond transient absorption spectrometer (Ultrafast Systems LLC) with a 365-nm laser (5 μW).

    Article Title: In-situ growth of low-dimensional perovskite-based insular nanocrystals for highly efficient light emitting diodes
    Article Snippet: TA was measured using a HELIOS femtosecond transient absorption spectrometer (Ultrafast Systems LLC) with a 365-nm laser (5 μW).

    Spectroscopy:

    Article Title: Intrinsic Carrier Diffusion in Perovskite Thin Films Uncovered by Transient Reflectance Spectroscopy
    Article Snippet: .. Ultrafast optical spectroscopy experiments were conducted with a HELIOS femtosecond transient absorption spectrometer (Ultrafast Systems, LLC). .. The 800 nm output from the regenerative amplifier (Coherent Libra, 1 kHz, 35 fs) was used as fundamental pulse to generate all pulses for our experiments through nonlinear crystals.

    Article Title: Photocatalytic upcycling of polylactic acid to alanine by sulfur vacancy-rich cadmium sulfide.
    Article Snippet: Photoluminescence spectra were recorded using a Tecan Infinite 200 Pro with an excited wavelength at 450 nm with CdS dispersed in ultrapure water (1 g/mL) as samples. .. Transient absorption spectroscopy (TAS) was conducted on a HELIOS femtosecond transient absorption spectrometer (Ultrafast Systems, LLC). ..

    Article Title: Making and Breaking of Exciton Cooling Bottlenecks in Halide Perovskite Nanocrystals.
    Article Snippet: Harnessing quantum confinement (QC) effects in semiconductors to retard hot carrier cooling (HCC) is an attractive approach for enabling efficient hot carrier extraction to overcome the Shockley−Queisser limit.. However, there is a debate about whether halide perovskite nanocrystals (PNCs) can effectively exploit these effects.. To address this, we utilized pump−probe and multipulse pump−push−probe spectroscopy to investigate HCC behavior in PNCs of varying sizes and cation compositions.

    Absorption Spectroscopy:

    Article Title: Integrated interfacial design of covalent organic framework photocatalysts to promote hydrogen evolution from water
    Article Snippet: .. Transient absorption spectroscopy Transient absorption spectroscopy was conducted with a HELIOS femtosecond transient absorption spectrometer (Ultrafast Systems, LLC). ..

    Modification:

    Article Title: Making and Breaking of Exciton Cooling Bottlenecks in Halide Perovskite Nanocrystals.
    Article Snippet: Harnessing quantum confinement (QC) effects in semiconductors to retard hot carrier cooling (HCC) is an attractive approach for enabling efficient hot carrier extraction to overcome the Shockley−Queisser limit.. However, there is a debate about whether halide perovskite nanocrystals (PNCs) can effectively exploit these effects.. To address this, we utilized pump−probe and multipulse pump−push−probe spectroscopy to investigate HCC behavior in PNCs of varying sizes and cation compositions.



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    a , b <t>Femtosecond</t> TA spectra in the 800–1200 nm range of TPC-3D under ( a ) air and ( b ) O 2 atmosphere. c Comparison of TA kinetic profiles at 1000 nm under air and O 2 conditions, respectively. d Decay lifetimes under O 2 and air conditions fitted by the tri-exponential function from corresponding TA kinetic traces at 1000 nm.
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    a , b <t>Femtosecond</t> TA spectra in the 800–1200 nm range of TPC-3D under ( a ) air and ( b ) O 2 atmosphere. c Comparison of TA kinetic profiles at 1000 nm under air and O 2 conditions, respectively. d Decay lifetimes under O 2 and air conditions fitted by the tri-exponential function from corresponding TA kinetic traces at 1000 nm.
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    Image Search Results


    a , b Femtosecond TA spectra in the 800–1200 nm range of TPC-3D under ( a ) air and ( b ) O 2 atmosphere. c Comparison of TA kinetic profiles at 1000 nm under air and O 2 conditions, respectively. d Decay lifetimes under O 2 and air conditions fitted by the tri-exponential function from corresponding TA kinetic traces at 1000 nm.

    Journal: Nature Communications

    Article Title: Achieving a solar-to-chemical efficiency of 3.6% in ambient conditions by inhibiting interlayer charges transport

    doi: 10.1038/s41467-024-49373-z

    Figure Lengend Snippet: a , b Femtosecond TA spectra in the 800–1200 nm range of TPC-3D under ( a ) air and ( b ) O 2 atmosphere. c Comparison of TA kinetic profiles at 1000 nm under air and O 2 conditions, respectively. d Decay lifetimes under O 2 and air conditions fitted by the tri-exponential function from corresponding TA kinetic traces at 1000 nm.

    Article Snippet: TA spectra of TPC-3D, PYR-2D, and TPL-2D w ere measured on a Helios femtosecond transient absorption spectrometer (Helios Fire, Ultrafast Systems, LLC).

    Techniques: Comparison

    a – b , Femtosecond TA spectra in 450–780 nm range of TPC-3D under ( a ) air and ( b ) O 2 atmosphere. c TA kinetic profiles of TPC-3D at 515 nm and 645 nm. TPC-3D exhibited a positive peak consistent with its electron donor monomers (TPC) at ~515 nm, defined as the signal of excitons (Supplementary Fig. ). For TPC-3D, the excitons peak at ~515 nm was followed by a positive peak at 645 nm (Supplementary Fig. ), attributed to polarons, and the time delay between them was the time for excitons to transfer to polarons, i.e. 630 fs. d Comparsion of TA kinetic profiles at 645 nm under air and O 2 condition, respectively. e Decay lifetimes under O 2 and air conditions fitted by the tri-exponential function from corresponding TA kinetic traces at 645 nm.

    Journal: Nature Communications

    Article Title: Achieving a solar-to-chemical efficiency of 3.6% in ambient conditions by inhibiting interlayer charges transport

    doi: 10.1038/s41467-024-49373-z

    Figure Lengend Snippet: a – b , Femtosecond TA spectra in 450–780 nm range of TPC-3D under ( a ) air and ( b ) O 2 atmosphere. c TA kinetic profiles of TPC-3D at 515 nm and 645 nm. TPC-3D exhibited a positive peak consistent with its electron donor monomers (TPC) at ~515 nm, defined as the signal of excitons (Supplementary Fig. ). For TPC-3D, the excitons peak at ~515 nm was followed by a positive peak at 645 nm (Supplementary Fig. ), attributed to polarons, and the time delay between them was the time for excitons to transfer to polarons, i.e. 630 fs. d Comparsion of TA kinetic profiles at 645 nm under air and O 2 condition, respectively. e Decay lifetimes under O 2 and air conditions fitted by the tri-exponential function from corresponding TA kinetic traces at 645 nm.

    Article Snippet: TA spectra of TPC-3D, PYR-2D, and TPL-2D w ere measured on a Helios femtosecond transient absorption spectrometer (Helios Fire, Ultrafast Systems, LLC).

    Techniques: