C11367-31Quantaurus-Tau Fluorescence lifetime spectrometer

c11367-31 product photo

Catalog [1 MB/PDF]

The Quantaurus-Tau is a compact system for quickly and easily measuring the fluorescence lifetime of photoluminescent materials from sub-nanoseconds to the millisecond range, with single-photon-counting sensitivity. Samples in different forms―thin films, solids, powders, and solutions―can be analyzed. Liquid samples can be cooled down to -196 deg.C (77K) with liquid nitrogen.
Operation is simple. Just load the sample into the sample chamber. Then enter a few conditions on the measurement software to measure the fluorescence lifetime and photoluminescence (PL) spectrum. It only takes a minute to get analysis results for a typical measurement. The measurement software includes a variety of measurement and analysis functions such as multicomponent analysis and multisample data comparison.

The C11367-31 is Standard model. (Sample: Solution・Thin-film, Wavelength range: 300 nm to 800 nm).


Fluorescence lifetime measurement

Measuring an excited-state relaxation process

The fluorescence spectrum obtained from an organic material or fluorescent probe is a vital parameter for controlling and evaluating the material functions and characteristics such as the peak wavelength and fluorescence intensity. However, a fluorescence spectrum usually shows time-integrated information, and so when the material contains multiple substances and reactive elements, their fluorescence spectrum can only be acquired as integrated information. An effective approach in such cases is to observe the light emission dynamics by making use of the time axis parameter. This is generally called fluorescence lifetime measurement, in which the time required for the substance excited by the pulsed light to return to its ground state is measured in the sub-nanosecond to millisecond region. This measurement allows obtaining more information such as multiple different fluorescence lifetimes even at the same wavelength and the percentage in which they are present within the material, etc.

●Easy and quick measurements

Emission Lifetime can be gotten easily and quickly only by putting the sample into sample box and setting the 4 measurement conditions.

●7 excitation wavelength

280 nm, 340 nm, 365 nm, 405 nm, 470 nm, 590 nm, or 630 nm.

●Analyzing different sample forms

Thin-film, solid, solutions and powder.

●Wavelength: 300 nm to 800 nm

●High sensitivity measurement by photon counting method

●Time resolution better than 100 ps (by deconvolution)

●Cooling function for solution sample (-196 °C) (option)

●Phosphorescence measurement (option)

●Fluorescence spectrum measurement

●Space-saving, compact design

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Relationship between quantum yield and fluorescence lifetime

The Jablonski energy diagram on the right shows the electronic energy levels of general organic molecules and indicates a few electronic transitions between the energy levels. S0, S1 and T1 represent the ground state, the lowest singlet state, and the lowest triplet state, respectively. After photoexcitation, the molecule in the excited state deactivates to the ground state via several relaxation pathways which are classified into radiation and radiationless processes. The radiation process involves the emission of radiation such as fluorescence and phosphorescence. The radiationless process involves internal conversion and intersystem crossing followed by thermal release. The radiation and radiationless processes compete with each other.

c11367-31 product feature


When the rate constants for fluorescence, internal conversion, and intersystem crossing are abbreviated by kf, kic, and kisc, respectively, the fluorescence lifetime Τf is expressed by the following equation.

Τf = 1/ (kf + kic + kisc) (1)

On the other hand, fluorescence quantum yield Φf is expressed as the equation below.

Φf = kf / (kf + kic + kisc) (2)

Thus, equation (3) is derived from equations (1) and (2).

kf = Φf / Τf (3)

You can see from the above equations that there is a close relationship between the fluorescence lifetime and quantum yield, and these parameters are fundamental and very important in controlling the emission properties of luminescent materials.

Hamamatsu has developed the Quantaurus series for a diversified evaluation of luminescent materials. Quantaurus-Tau and Quantaurus-QY are now available for measuring fluorescence lifetime and quantum yield, respectively. Complementary analyses with the two systems enable users to promote development of photoluminescent materials.
Detail information for absolute PL quantum yields measurement system Quntaurus-QY, you can get it from recommended product area in the below.


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Spectral response

c11367-31 spectral response

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Fluorescence lifetime measurement is applicable to varied applications. Typical applications include electron movement and energy transfer reactions within or between organic metallic complex molecules, as well as fluorescence and phosphorescence lifetime measurement of materials essential for developing organic EL devices, FRET (fluorescence resonance energy transfer) in fluorescent proteins, and pass/fail testing of compound semiconductors for solar cells and LED, etc.

  • Organic metal complex
  • Fluorescent probe
  • Dye sensitized PV material
  • OLED material
  • Quantum dot
  • LED phosphor

c11367-31 application example

c11367-31 application example

c11367-31 application example

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Measurement procedure

c11367-31 measurement procedure

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Analysis function

Multi-component fluorescence lifetime analysis and comparison

c11367-31 measurement example

・Multi-component analysis of up to five components
In fluorescence lifetime measurement, a phenomenon often occurs where the data is observed as the sum of the attenuation curves of multicomponent fluorescence lifetimes. Quantaurus-Tau easily calculates the fluorescence lifetime data and component ratio of each element by using the dedicated software.
・Highly accurate analysis by deconvolution
Deconvolution processing enables fluorescence lifetime analysis with high accuracy. When analyzing longer lifetime components such as phosphorescence, the "Tail Fit" function can be used instead of deconvolution processing.
・Real-time display of time profiles and spectrum
Time profiles or spectrum are displayed on the monitor screen in real-time. This is a useful function for selecting the time scale during measurement or determining the analysis data range.

Multi-sample fluorescence lifetime analysis and comparison

c11367-31 measurement example

・Multiple data analysis on the same screen
Calculated fluorescence lifetime values are also displayed on the same screen for easy comparison analysis.
・Comparisons under the same fitting
To make comparison analysis under the same conditions, Quantaurus-Tau subjects the multiple samples to specific fitting ranges, IRF (Instrument Response Functions), and parameter settings.
・Graph editing with a graph setup feature
This allows you to change the range of each axis as needed on the comparison analysis screen so that the data can be edited to match your purpose. This feature also allows powerful normalizing whenever needed.
・Acquired data can be easily stored as text data
The acquired data can be stored into the graph analysis software as text data by simple copy-and-paste operations.

Multi-sample PL spectrum analysis and comparison

c11367-31 measurement example

・Time-resolved spectrum display
Allows time-resolved spectrum display the greatest feature offered by streak camera systems.
・Spectrum and fluorescence decay curve display
Displays the full width at half maximum (FWHM), peak position and peak intensity for each profile
・Multiple data loading and comparison on the same screen.
Normalized processing makes multiple data comparison easy.

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Type number  C11367-31 
Sample  Solution, Thin-film 
Detector type  Standard 
Wavelength range  300 nm to 800 nm 
Excitation light source  Seven types of LED light source (280 nm, 340 nm, 365 nm, 405 nm, 470 nm, 590 nm, 630 nm) 
Excitation light source switching  Software control 
Monochromator  Czerny-Turner monochromator 
Measurement time range  4 ns to 10 s / full scale 
Phosphorescence measurement  Phosphorescence excitation wavelength (280 nm, 340 nm, 365 nm, 405 nm, 442 nm, 470 nm, 589 nm, 632 nm) 
Time axis channel  512 ch, 1024 ch, 2048 ch, 4096 ch 
Total time resolution  < 1.0 ns FWHM (IRF with 365 nm LED) 
Analysis function  Fluorescence lifetime analysis (up to five components by exponential function fitting) and spectrum analysis 
Supported OS  Windows 7 (32 bit), Windows 7 (64 bit) 

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c11367-31 dimensional outline

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Related information

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