Spectrofluorometer

This instrument is specifically designed for fluorescence studies of electrochemical samples. It features a broad spectral range, high

 measurement sensitivity, and stable light source intensity, making it suitable for fluorescence characterization of both solid-state and

 liquid electrochemical samples. The instrument can accurately capture the emission and excitation spectra of samples, using white light

 and monochromatic light in the range of 200 to 1200 nm for sample illumination. Its high-efficiency xenon lamp provides an innovative

 light intensity stabilization mode, serving as the white light source in the system, and is combined with an AM1.5G air mass filter to 

simulate the solar light spectrum.

The sample chamber entrance is equipped with a monochromator featuring automatically adjustable input and output slits 

(used to receive light from the xenon lamp source and direct it into the sample chamber). The incident light intensity can be precisely 

controlled by adjusting the slit width. A second monochromator is installed at the sample chamber exit to capture the fluorescence 

emission of the sample. The output slit is connected to a photomultiplier tube (PMT), which is linked to a controller and counter for 

real-time capture of fluorescence photons. This system can precisely define the entire fluorescence spectrum and supports total

 fluorescence intensity measurement, enabling simultaneous capture of all emission wavelengths. To reduce stray light, filter wheels are

 installed at both the entrance and exit of the sample chamber. By adding supplementary light sources (e.g., a halogen lamp) and an

 additional PMT, the spectral range of the system can be extended to 1800 nm. The operation of the entire instrument is automated and 

controlled via the intuitive FotoGUI software, ensuring ease of use and high efficiency.

"Measurement Functions" Fluorescence excitation spectrum, Fluorescence emission spectrum

"System Configuration"

· Two monochromators: Located at the entrance and exit of the sample chamber, capable of operating in the UV, visible, and infrared ranges.

· Photomultiplier tube (PMT): Positioned at the output of the monochromator to capture the fluorescence of the sample.

· Electronic counter: Processes signals from the photomultiplier tube.

· Potentiostat: Operates in control mode and is connected to the photomultiplier tube.

· Sample assembly: Customizable according to the specific sample type.

· Filter wheels: Two filter wheels are equipped at the entrance and exit of the sample chamber, providing six independent filter positions.

· Xenon lamp: A xenon lamp with a controller and water cooling system provides a stable light source.

· PCE photodiode: Used to control the current incident beam intensity.

· FotoGUI software: A computer equipped with dedicated FotoGUI software ensures easy and efficient system operation.

"Technical Specifications"

· Photomultiplier tube (PMT): R928P Hamamatsu, adjustable sensitivity (voltage adjustment range: 500 - 1200 V)

· Spectral range: 160 - 900 nm

· Monochromator spectral range: 200 - 1200 nm (extendable to 1800 nm - requires an additional grating)

· Xenon lamp: Three stabilization modes — light intensity, lamp current, and lamp power

· Custom filter types, including Air Mass 1.5G

· Incident light spectral range extendable to 1800 nm - requires an additional light source (halogen lamp)

· Customizable, separate, and adjustable sample assembly depending on the sample type