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Shukla M.,Pandit Ravishankar Shukla University | Brahme N.,Pandit Ravishankar Shukla University | Kher R.S.,Government Science PG College | Khokhar M.S.K.,Guru Ghasidas University
Indian Journal of Pure and Applied Physics | Year: 2011

An elementary approach has been suggested to calculate the external quantum efficiency (EQE) of polymer light emitting diodes (PLEDs). This approach requires only the electroluminescence (EL) spectrum and illumination versus current characteristics of the devices to calculate the EQE. In these calculations the light emission has been considered to be perfectly diffusive from the emission surface. The efficiencies calculated in this way have been compared with the actual values of the EQEs for the different PLED structures available in the literature. The calculated values have shown good agreement with the measured values. Copyright © 2011. Source


Shukla M.,Academic Staff College | Tiwari A.,Guru Ghasidas Vishwavidyalya | Brahme N.,Pandit Ravishankar Shukla University | Kher R.S.,Government Science PG College | Dhoble S.J.,Rashtrasant Tukadoji Maharaj Nagpur University
Journal of Applied Spectroscopy | Year: 2013

Enhancement in chemiluminescence (CL) signals was obtained when an aqueous alkaline solution of hydrazine was mixed with a luminol-hydrogen peroxide system. The CL intensity is a linear function of hydrazine concentration over a range of 1-10 μg/ml. Several variables on the CL response were examined for the determination of optimum conditions for the system. A possible mechanism of the CL reaction is also discussed. © 2013 Springer Science+Business Media New York. Source

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