Increasing the luminous efficiency of an MEH-PPV based PLED using salmon DNA and single walled carbon nanotube

• Published in: Journal of luminescence 2011-07, Vol.131 (7), p.1264-1266
• Main Authors: Madhwal, Devinder, Singh, Inderpreet, Kumar, Jitender, Bhatia, C.S., Bhatnagar, P.K., Mathur, P.C.
• Format: Article
• Language: English
• Subjects: Applied sciences; Deoxyribonucleic acid; Devices; DNA–CTMA complex; Electron blocking layer; Electron transporting layer; Electronics; Exact sciences and technology; Light-emitting diodes; Luminance; Luminescence; Networks; Optoelectronic devices; PLEDs; Polymer–SWCNT composites; Salmon; Salmonidae; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Single wall carbon nanotubes
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2011.03.004

The combined effect of a salmon deoxyribonucleic acid (DNA)-based electron blocking layer and a single walled carbon nanotube (SWCNT) composite-based electron transport layer on the performance of a poly[2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) polymer light emitting diode (PLED) has been examined. The SWCNT network in the composite layer improves electron injection from cathode and the DNA blocks these high mobility electrons at the electron blocking layer–polymer interface, leading to high luminance from the device. The luminous efficiency of the PLED is increased ∼20 times compared to that of a PLED using only MEH-PPV. ► We report fabrication of a high luminous efficiency MEH-PPV based polymer LED. ► Salmon DNA–CTMA layer is used to block injected electrons in the polymer layer. ► MEH-PPV–SWCNT composite is used to transport electrons in the polymer layer. ► The luminous efficiency of the polymer LED thereby improves about 20 times.