| Full text | |
| Author(s): |
Nunes-Neto, Oswaldo
[1]
;
Batagin-Neto, Augusto
[2]
;
Leite, Douglas M. G.
[3]
;
Nuesch, Frank A.
[4]
;
Graeff, Carlos F. O.
[1, 5]
Total Authors: 5
|
| Affiliation: | [1] Univ Estadual Paulista, Fac Ciencias, POSMAT Programa Posgrad Ciencia & Tecnol Mat, UNESP, Bauru - Brazil
[2] Univ Estadual Paulista, UNESP, Campus Expt Itapeva, Itapeva, SP - Brazil
[3] Inst Tecnol Aeronaut, Div Ciencias Fundamentais, Dept Fis, Campus CTA, Sao Jose Dos Campos, SP - Brazil
[4] EMPA, Lab Funct Polymers, Swiss Fed Labs Mat Sci & Technol, Uberlandstr 129, CH-8600 Dubendorf - Switzerland
[5] Univ Estadual Paulista, Fac Ciencias, UNESP, Bauru - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | ORGANIC ELECTRONICS; v. 50, p. 347-358, NOV 2017. |
| Web of Science Citations: | 4 |
| Abstract | |
The effect of an external magnetic field on electrical impedance was measured on tris-(8hydroxyquinoline) aluminum (Alq(3)) based OLEDs at different temperatures. Magnetic field effects (MFEs) were responsible for significant changes on the real and imaginary components of the impedance, and for the intensification of the negative capacitance (NC) effect. The observed MFEs do not present a strong temperature dependence. Simulations via equivalent circuits and numerical solutions of Boltzmann transport equations in a drift-diffusion approximation and employing small sinusoidal signal analysis indicate that such effects are consistent with an enhancement of the carrier mobilities and a quenching of the recombination rates. Such changes lead to reduced resistance and more intense NC effects on the device. The results were interpreted in terms of the currently accepted OMAR models: electron-hole pair model, triplet-polaron reaction mechanism and bipolaron model. (C) 2017 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 12/03116-7 - Simulation of electronic and optical properties of organic materials |
| Grantee: | Augusto Batagin Neto |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 08/57872-1 - National Institute for Materials Science in Nanotechnology |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 11/21830-6 - Study of Spin Dependent Transport Processes in Organic Solar Cells. |
| Grantee: | Oswaldo Nunes Neto |
| Support Opportunities: | Scholarships in Brazil - Doctorate |