ArticleScientific reports2026
Multifunctional graphene oxide and PEDOTPSS nanocomposite enabling highly efficient blue multishelled ZnSeTe quantum dot light emitting diodes.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In this work, a groundbreaking approach has been incorporated to achieve highly efficient multishelled Zinc Selenium Tellurium (ZnSeTe) blue quantum-dot light-emitting diodes (QD-LEDs) through the integration of a multifunctional graphene oxide (GO)/PEDOT:PSS nanocomposite. We also investigated the synthesis of cadmium-free blue quantum dots (QDs) and PEDOT:PSS:GO nanocomposites, the optimization of device structures through simulation, and the fabrication of high-efficiency quantum dot light-emitting diodes (QLEDs). The synergistic properties of GO and PEDOT:PSS revolutionize the charge transport dynamics, significantly enhancing electrical conductivity and structural integrity. The GO/PEDOT:PSS layer exhibits multifaceted functionalities: it facilitates efficient hole injection, serves as an effective hole transport layer (HTL), and provides robust electron-blocking capabilities. This multifunctionality ensures optimal energy level alignment, minimizes charge injection barriers, and fosters superior electron-hole recombination, drastically reducing non-radiative losses and resulting in a sharp increase in quantum efficiency and device performance. In this study, we also designed and simulated ZnSeTe/ZnSe/ZnS QD-LEDs incorporating multifunctional GO/PEDOT:PSS layer. Notably, the GO/PEDOT:PSS device demonstrates an 61% enhancement in power efficacy, 38% improvement in current efficacy, 38% increase in external quantum efficiency (EQE), 25% boost in brightness, and 62% extension in device lifetime as compared with its counterpart. Furthermore, simulations conducted in parallel with experimental investigations reveal a strong correlation, validating the predictive models and enhancing confidence in the design approach. The multishelled ZnSeTe quantum dots, known for their exceptional bandgap tunability and robust photoluminescence, form a highly stable emissive layer that delivers intense blue light with remarkable color purity and brightness. Our results establish unprecedented benchmarks in luminance, quantum efficiency, and device stability, positioning this GO/PEDOT:PSS architecture as a transformative solution for next-generation QD-LEDs. This work not only sets a new standard for blue QD-LEDs but also opens vast opportunities for the integration of multifunctional nanocomposites in cutting-edge display and optoelectronic technologies.
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