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Optoelectronic properties of organic light-emitting diode containing quantum wells and barriers of biomolecules

Grant number: 13/27047-7
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2014
Effective date (End): October 31, 2017
Field of knowledge:Interdisciplinary Subjects
Principal Investigator:Francisco Eduardo Gontijo Guimaraes
Grantee:Gustavo Targino Valente
Home Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil


Organic light-emitting diode (OLEDs) are shown as an innovative alternative in the energy scene. However, efficiency and lifetime of them are still below the desirable parameters. In this context, the project proposes a new concept of hybrid OLED based on heterostructures with energy modulation in the form well or barrier of biomolecules (active layer) and semiconducting polymers (carrier layer charge). Thus, the purpose is to get the same characteristic of efficient inorganic LEDs, i.e, maximum recombination condition of charge carriers. In these heterostructures is possible to promote the confinement of charge carriers in a thin active layer in order to: i) increase the probability of electron-hole pair interaction, ii) reduce the exciton migration, which increases the emission efficiency, iii ) control the position of confinement layer in relation to the optical cavity and electrodes to minimize the possibility of excitons dissociation by the high fields near the electrodes, providing greater efficiency of emission. Furthermore, the proposed integration of charge carrier polymer material with emissive properties of biomolecules is innovative since no yet exist hybrid light emitting diodes formed by these materials. This project will be supported by the infrastructure installed on Polymer Group Bernhard Gross IFSC / USP and partnerships established under the National Institute of Organic Electronics (INEO).

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SPADA, EDNA R.; VALENTE, GUSTAVO T.; PEREIRA-DA-SILVA, MARCELO A.; SARTORELLI, MARIA L.; GUIMARAES, FRANCISCO E. G.; FARIA, ROBERTO M. Copper spherical cavity arrays: Fluorescence enhancement in PFO films. Applied Surface Science, v. 392, p. 1181-1186, JAN 15 2017. Web of Science Citations: 0.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
VALENTE, Gustavo Targino. Exciton dynamics and charge transport in organic heterostructure. 2017. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Física de São Carlos São Carlos.

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