Organic light-emitting diodes based on PVK and Zn(II) salicylidene composites

Author(s)

Germino, Jose Carlos ^[1] ; de Freitas, Jilian Nei ^[2] ; Domingues, Raquel Aparecida ^[3] ; Quites, Fernando Junior ^[4] ; Faleiros, Marcelo Meira ^[1] ; Zambon Atvars, Teresa Dib ^[1]

Affiliation

^[1] Univ Campinas UNICAMP, Chem Inst, Campinas, SP - Brazil

^[2] Ctr Informat Technol Renato Archer CTI, Campinas, SP - Brazil

^[3] Fed Univ Sao Paulo UNIFESP, Dept Chem, Sao Jose Dos Campos - Brazil

^[4] Fed Univ Juiz Fora UFJF, Exact Sci Inst, Dept Chem, Juiz De Fora - Brazil

• Document type: Journal article
• Source: Synthetic Metals; v. 241, p. 7-16, JUL 2018.
• Web of Science Citations: 6

Abstract

The photo- and electroluminescence properties of solution-processed organic light-emitting diodes (OLEDs) consisting of composites of PVK as a host with {[}Zn(salophen)] or {[}Zn(sal-3,4-ben)] as guests were studied. Devices consisted of a single spin-coated active layer. The electro-optical properties (voltage turn-on (V-on), brightness (L-max) and current efficiency (eta(curr))) of the coordination compounds were better than those of the ligands. This improvement can be explained by the increase of the hole mobility (mu(p)) compared to the PVK and PVK:salicylidenes composites. The L-max and eta(curr) were three times higher for the PVIC{[}Zn(sal-3,4-ben)] (V-on = 6.5 V; L-max = 131 cd m(-2); eta(curr) = 36 mcd A(-1)) diode than the PVK:{[}Zn(salophen)] (V-on = 9.5 V; L-max = 52 cd m(-2); eta(curr)= 11 mcd A(-1)) due to the increase of the hole mobilities of mu(p)({[}Zn(sal-3,4-ben)]) similar to 10(2)x mu(p)({[}Zn(salophen)]). Moreover, the PVK:{[}Zn(sal-3,4-ben)] diode presented L-max and eta(curr )comparable to the PVK:8-hydroxyquilinate compounds (Alq(3) and Znq(2)) prepared using the same procedure which can be explained by the hole mobilities of these composites and photoluminescence quantum yields (PLQY) of the coordination compounds. (AU)

• FAPESP's process: 13/16245-2 - Photophysical properties of thin films of conjugated polymers
• Grantee: Teresa Dib Zambon Atvars
• Support Opportunities: Regular Research Grants