Video

Experiment Title: Application of Power Amplifier in Electro-induced Transient Spectroscopy System

Experiment Equipment: Photoluminescent device, pulse signal generator, power amplifier (ATA-2041), photomultiplier tube, oscilloscope

Experiment Process:

(1) Characterization of Optical Properties

(2) Design of Device Structure

(3) Application of Pulse Signals to Doped Device ElectrodesAfter preparing the doped device, pulse signals are applied to its anode and cathode. The device emits light under a very short forward pulse voltage. The voltage is then removed or a reverse pulse is applied. The light signal is detected by a photomultiplier tube, converted into an electrical signal, amplified by a power amplifier, and displayed on an oscilloscope. The cycle is 2.5ms, duty cycle 0.4%, pulse width 10μs, positive pulse 12V, negative pulse -7V. Transient electro - luminescence spectra of fluorescent devices with MADN.NPB as the host and DPAVBi as the dopant, similar in efficiency, are compared.

Experiment Results:

Power AmplifierElectro - induced Transient Luminescence Spectra of the Device

It can be concluded that under pulsed voltage excitation, the observed afterglow in such host - guest devices is not TTA delayed fluorescence.

Experiment Conclusion:

In MADN-based devices, the TTA upconversion is not significant and contributes little to EQE improvement. This suggests that using host TTA upconversion energy transfer to enhance the efficiency of blue fluorescent OLED devices is not effective.

The ATA-2041 high-voltage amplifier has a maximum output of 400Vp-p (±200Vp) and can drive high - voltage loads. Its voltage gain is digitally controlled and adjustable, with a one - key option to save common settings. It offers convenient operation and is compatible with mainstream signal generators.