Biosubstrates Obtained from Gellan Gum for Organic Light-Emitting Diodes

Author(s)

Faraco, Thales A. ^[1] ; Silva, Halice de O. X. ^[1] ; Barud, Hernane da S. ^[2] ; Ribeiro, Tais de C. ^[2] ; Maciel, Indhira O. ^[1] ; Quirino, Welber G. ^[1] ; Fragneaud, Benjamin ^[1] ; Cremona, Marco ^[3] ; Pandoli, Omar Ginoble ^[4] ; Legnani, Cristiano ^{[5, 1]}

Affiliation

^[1] Univ Fed Juiz de Fora UFJF, Dept Fis, Grp Nanociencia & Nanotecnol NANO, BR-36036330 Juiz De Fora, MG - Brazil

^[2] Univ Araraquara UNIARA, Dept Biotecnol, Lab Biopolimeros & Biomat BIOPOLMAT, BR-14801340 Araraquara, SP - Brazil

^[3] Pontificia Univ Catolica Rio de Janeiro PUC Rio, Dept Fis, Lab Optoeletron Mol LOEM, BR-22453970 Rio De Janeiro, RJ - Brazil

^[4] Pontificia Univ Catolica Rio de Janeiro PUC Rio, Dept Quim, BR-22453970 Rio De Janeiro, RJ - Brazil

^[5] Univ Estatual Paulista Julio de Mesquita Filho UN, Inst Quim, BR-14801970 Araraquara, SP - Brazil

• Document type: Journal article
• Source: ACS APPLIED ELECTRONIC MATERIALS; v. 3, n. 5, p. 2333-2340, MAY 25 2021.
• Web of Science Citations: 0

Abstract

Nowadays, flexible organic electronics are under intense investigation for environmentally friendly and biocompatible applications. One of the main components of electronic devices is the substrate, which gives support for building devices. There is great interest in the scientific community for the development of biocompatible and biodegradable substrates for the manufacture of these kinds of devices, aiming at technological and medical applications. In this work, we produced a flexible and transparent biosubstrate based on a gellan gum polymer by a solvent casting method to manufacture flexible organic light-emitting diodes (FOLEDs). The gellan substrate exhibited optical transparency of about 78% at 550 nm and 80% at 900 nm. In addition, the optimized indium tin oxide (ITO)/SiO2-coated gellan substrate exhibited a resistivity of 2.8 x 10(-4) Omega.cm and a sheet resistance of 11.2 Omega/sq. These values are better or equal to those found in the literature for similar biosubstrates. Finally, the fabricated FOLEDs exhibited a maximum luminance of about 2327 cd/m(2) and the current efficiency reached a maximum value of 2.9 cd/A. These characteristics reveal that this biosubstrate has interesting potential for applications in flexible green electronics, mainly due to its biocompatible properties and the results obtained by the developed FOLEDs. (AU)

• FAPESP's process: 20/04509-9 - Development of biocompatible conductive substrates based on biocellulose and silk fibroin for applications in retinal implants
• Grantee: Sidney José Lima Ribeiro
• Support Opportunities: Research Grants - Visiting Researcher Grant - Brazil