Ms. Sweta Rani Profile

Sweta Rani

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SPIE Journal Paper | 24 December 2022

Analysis of thermal performance and charge balance in all-inorganic quantum dot light-emitting devices

Sweta Rani, Jitendra Kumar

JNP, Vol. 16, Issue 04, 046008, (December 2022) https://doi.org/10.1117/12.10.1117/1.JNP.16.046008

KEYWORDS: Quantum devices, Design and modelling, Quantum dots, Quantum dot emission, Quenching, Anodes, Quantum dot light emitters, Zinc oxide, Oxides, Electron transport

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The quantum dot light-emitting devices (QLEDs) have emerged as a promising candidate for electroluminescent devices due to their excellent optical properties, high efficiency, and tunable bandgaps. The QLEDs with increased and prolonged brightness have potential applications in lighting and display devices. However, the stability of these devices is still a matter of concern, and some factors that affect the luminescence from the device involve electric field and temperature-dependent conduction mechanism. Thermal degradation, quenching within the quantum dots, the design of charge transport layers and the charge balance between them are also some factors that affect the efficacy of these devices. The high working temperature of QLEDs is among the most challenging degradation mechanisms, thus an analysis has been carried out regarding the working temperature within the QLEDs, and the methods to minimize these effects have been studied. Another challenge is achieving charge balance within the device and different device structures have been analyzed to achieve the best results regarding charge balance within the device. A few potential strategies have been suggested to reduce the constraints faced in these electroluminescent devices.

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