Plasmon Enhanced Emission of Perovskite Quantum Dot Films
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Plasmon Enhanced Emission of Perovskite Quantum Dot Films Seyma Dadı1*, Yemliha Altıntas1*, Emre Beskazak2, Evren Mutlugun2 1 Abdullah Gül University, Department of Materials Science and Nanotechnology Engineering, 38080, Kayseri, Turkey
2
Abdullah Gül University, Department of Electrical-Electronics Engineering, 38080, Kayseri, Turkey
* The authors contributed equally to this work
ABSTRACT
We propose and demonstrate the photoluminescence enhancement of CsPbBr 3 perovskite quantum dot films in the presence of Au nanoparticles. Embedded into a polymer matrix, Au nanoparticle- quantum dot film assemble prepared by an easy spin coating method enabled the photoluminescence enhancement of perovskite quantum dot films up to 78%. The properties of the synthesized perovskite QDs and gold nanoparticles have been analysed using high resolution transmission electron microscopy, X-ray diffraction, energy dispersive X- ray spectroscopy, UV-Vis absorption spectrophotometer, steady state and time-resolved photoluminescence spectrometer.
INTRODUCTION 0D nanoparticles, also known as quantum dots have been on the basis of topnotch optoelectronic devices in recent years owing their exotic optical properties. Their high quantum yield along with their tuneable optical properties based on synthesis methodologies has made them important building blocks of future electronics [1]. In recent years, apart from the mature material systems of semiconductor nanocrystals, all inorganic halide perovskite quantum dots (PQDs) have also gained great attention owing to their high photoluminescence quantum yield and very narrow emission bandwidth [2,3]. CsPbX3 (X: Cl, Br, I) type perovskite quantum dots have been shown to reach up to 90% quantum yield possessing full-width half maximum values as narrow as 12 nm [2]. In that respect, their applications have started to emerge as electroluminescent materials and color converters [4-6]. Despite all the advantages PQDs offers, preserving high quantum yield in their film form still remains a challenge, which is an important limitation for device applications.
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One of the mechanisms to overcome the limitation is metal enhanced fluorescence. Plasmonic nanoparticles are widely been used as light harvesting agents for applications in photovoltaics and light emitting diodes [7-11]. Based on the collective oscillations of free electrons of the metal nanoparticles, localized in optimal distances with the quantum dots, metallic nanoparticles have been shown to enhance the local electric field and increase the photoluminescence intensity of the semiconductor quantum dots [12-14]. This sort of interaction depends on the spectral overlap of the metal absorption and the fluorescence of the emitter as well as the distance between the emitter and the metal nanopart
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