Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. The synthesis procedure of compound 3 (isatin Schiff base). Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. The structures of three stereo-isomers of compound 3. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. Three conformers of the most stable stereo-isomer, (Z, Z), of compound 3, and all possible forms of isatin, besides their own relative energies in kcal/mol (the absolute calculated energies in a.u. are given in brackets), calculated at B3LYP/6–31G** level of theory. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. Optimized structures and HOMO/LUMO surfaces view for the most stable conformers of compounds 1 and 3. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. Schematic energy level diagram of organic materials used in OLEDs. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. Absorption spectra of compounds 1 and 3. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. PL and EL spectra of compound 3. The shift in the spectra is because they originate from different transitions. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. (a) Comparison between the PL and (b) the EL spectra of compounds 1 and 3. The line shape resemblance of the two compounds to each other points to the fact that the emissions in each case originate from the same segment of the molecule. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. Chromacity diagram with CIE coordinates of compound 1 (isatin) and compound 3 (isatin Schiff base). Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. EL intensity of OLED at different voltages of compound 3. No spectral shift is observed at higher voltages. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. External quantum efficiency and power efficiency of compound 3 as a function of current density. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. The operating lifetime characteristics of the red OLED driven at constant voltage that measured under air condition. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /

Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. Current density versus voltage at different thicknesses for compound 3. A characteristic diode behavior is observed for each thickness as the voltage is increased. Figure Legend: From: Fabrication and electrical characterization of red organic light emitting diode using an isatin derivative as an organic chromophore Opt. Eng. 2011;50(4): doi: /