CdS/ZnS nanocomposite: synthesis and utilization in organic light-emitting diodes for a lower turn-on voltage
Source abstract
Abstract
CdS/ZnS was synthesized using a hydrothermal method to prepare a nanocomposite with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) polymer as a hole transport layer in samples of organic light-emitting diodes (OLEDs). The organometallic nano-complex bis(8-hydroxyquinoline) zinc (Znq2) was synthesized through a precipitation method as fluorescent material in the OLEDs. The structural and optical properties of synthesized nanostructures were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible (UV-Vis) spectroscopy, and photoluminescence (PL). The energy levels of the products were determined by cyclic voltammetry (CV) measurement. Various amounts of Znq2 were dissolved in dichloromethane and optimal concentration was obtained using PL analysis. The effect of the weight percentages of CdS/ZnS nanocomposite on the luminescence of the Znq2-dichloromethane solution was examined. Three samples of OLEDs with different concentrations of CdS/ZnS in the forms of A: ITO/PEDOT:PSS/Znq2/PBD/Al; B: ITO/PEDOT:PSS:CdS/ZnS (0.1%)/Znq2/PBD/Al; and C: ITO/PEDOT:PSS:CdS/ZnS (0.4%)/Znq2/PBD/Al were fabricated. The results of voltage-current density measurement showed that the turn-on voltage of fabricated OLEDs was decreased from more than 3 V for non-doped OLED to 1 V for the OLED with 0.4% of nanocomposite in the hole transport layer.
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Research context
OpenAlex topics: Organic Light-Emitting Diodes Research · Quantum Dots Synthesis And Properties · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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