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http://nopr.niscpr.res.in/handle/123456789/7568| Title: | Synthesis and characterization of greenish-blue light emitting lithium-boron complex for organic light emitting diode applications |
| Authors: | Misra, Aparna Kumar, Pankaj Kumar, Lokendra Kumar Dhawan, S K Dhawan Kamalasanan, M N Chandra, Subhas |
| Issue Date: | Aug-2006 |
| Publisher: | CSIR |
| IPC Code: | H01L 51/50 |
| Abstract: | A lithium-boron complex, lithium tetra (2-methyl 8-hydroxy quinolinato) boron (LiBqm4), which emits greenish-blue light has been synthesized by the reaction of LiBH4 with 2-methyl 8-hydroxyquinoline in a molecular weight ratio of 1:4, and used for organic light emitting diodes (OLEDs) fabrication. The complex has been characterized by optical absorption, Fourier Transform Infrared (FTIR), photoluminescence (PL) and electroluminescence (EL) spectroscopic methods. The thermo-gravimetric analysis (TGA) suggests that the material is quite thermally stable up to 380oC. An optical band gap of 3.15 eV using the well-known Tauc relation and an exciton binding energy of 0.69 eV has been evaluated. OLEDs have been fabricated in ITO/N,N′-di-(3-methyl-phenyl)-N,N′diphenyl-4,4′diaminobiphenyl(TPD)/LiBqm4/Al configuration. PL and EL peaks exist at 503 nm. I-V characteristic of device reveals that at higher voltages the current follows I ⍺ Vm law, where m > 1. |
| Page(s): | 357-361 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Appears in Collections: | IJEMS Vol.13(4) [August 2006] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJEMS 13(4) 357-361.pdf | 260.16 kB | Adobe PDF | View/Open |
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