Optical and morphological features of poly(vinyl carbazole)/ferrite composites for potential opto-electronic applications

In this work, three composite films built upon poly(vinyl carbazole) (PVK) and Fe 3 O 4 , FeLiO 2 and (La 0.6 Sr 0.4 ) (Co 0.2 Fe 0.8 )O 3 (LSCF) ferrites were produced by sonication and drop-casting. The optical absorption, emission, and band gap properties of all samples were investigated using op...

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Veröffentlicht in:Applied physics. A, Materials science & processing Materials science & processing, 2021-11, Vol.127 (11), Article 855
Hauptverfasser: Tavares, Tiago B., de Sousa, Francisco F., Sales, Maria J. A., Paterno, Leonardo G., Paschoal, Waldomiro, Moreira, Sanclayton G. C.
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container_issue 11
container_start_page
container_title Applied physics. A, Materials science & processing
container_volume 127
creator Tavares, Tiago B.
de Sousa, Francisco F.
Sales, Maria J. A.
Paterno, Leonardo G.
Paschoal, Waldomiro
Moreira, Sanclayton G. C.
description In this work, three composite films built upon poly(vinyl carbazole) (PVK) and Fe 3 O 4 , FeLiO 2 and (La 0.6 Sr 0.4 ) (Co 0.2 Fe 0.8 )O 3 (LSCF) ferrites were produced by sonication and drop-casting. The optical absorption, emission, and band gap properties of all samples were investigated using optical spectroscopy techniques and morphological analysis by scanning electron microscopy (SEM). After introducing the ferrites, the optical absorbance of PVK in the range between 280 and 400 nm increased, whereas its bandgap systematically reduced. On the other hand, emission spectra of PVK were broadened with all ferrites and blue-shifted only in the presence of FeLiO 2 . Meanwhile, PVK excited state lifetimes were significantly shortened, thereby suggesting the creation of donor/acceptor states in the bandgap, which ultimately suppress the PVK emission. Although SEM images showed the presence of aggregated ferrites, most of them were readily dispersed in the PVK matrix.
doi_str_mv 10.1007/s00339-021-04975-y
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subjects Applied physics
Blue shift
Carbazoles
Characterization and Evaluation of Materials
Condensed Matter Physics
Emission analysis
Emission spectra
Energy gap
Ferrites
Iron oxides
Machines
Manufacturing
Materials science
Morphology
Nanotechnology
Optical and Electronic Materials
Optical properties
Optoelectronics
Physics
Physics and Astronomy
Polyvinyl carbazole
Processes
Scanning electron microscopy
Spectrum analysis
Surfaces and Interfaces
Thin Films
title Optical and morphological features of poly(vinyl carbazole)/ferrite composites for potential opto-electronic applications
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