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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

On the photoconductivity behavior of emeraldine-salt polyaniline films

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Author(s):
de Paiva, A. B. [1] ; Correr, I, G. ; Ugucioni, J. C. [2] ; Carvalho, G. R. [3] ; Jasinevicius, R. G. [4] ; de Godoy, M. P. F. [5]
Total Authors: 6
Affiliation:
[1] Univ Fed Sao Carlos, Dept Fis, UFSCar, PA 676, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Lavras UFLA, Dept Fis, Lavras, MG - Brazil
[3] Univ Fed Juiz de Fora UFJF, Dept Fis, Juiz De Fora, MG - Brazil
[4] Univ Sao Paulo, Dept Engn Mecan, Escola Engn Sao Carlos, Sao Paulo, SP - Brazil
[5] Correr, G., I, Univ Fed Sao Carlos, Dept Fis, UFSCar, PA 676, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Synthetic Metals; v. 281, NOV 2021.
Web of Science Citations: 0
Abstract

Deep and shallow traps play a fundamental role in the photoresponse profile of organic devices. Here we present an investigation on emeraldine-salt polyaniline films concerning structural, optical, and electrical properties by X-rays diffraction, optical and electron microscopies, and optical spectroscopies as Fourier Transform Infrared Spectroscopy (FTIR), absorption, and photoluminescence (PL). Photoconductivity measurements show signatures related to localized states near-edge absorption and the efficient transition between polaron bands. The photoconductive profile is dependent on the excitation intensity and presents negative photoconductivity (NPC) for higher intensities. A rate equations model attributes the NPC to shallow traps while the increase of response and recovery times are associated with deep traps. (AU)

FAPESP's process: 18/25886-5 - Spectroscopy in perovskites based on rare earth doped niobates
Grantee:Guilherme Ilario Correr
Support Opportunities: Scholarships in Brazil - Scientific Initiation