Electrical, Thermoelectrical and PEC Studies of Copper Doped CdSe Thin Films

Copper doped CdSe thin films of various composition (0.1-1.0 mol %) deposited by dip coating technique on clean glass substrate at room temperature. Sample prepared on stainless steel plates have been applied for PEC characterization. The electrical conductance at 300K enhances as the amount of copper raises up to 0.1 mol % and later magnitude shrinks for greater amount.Copperr doped samples demonstrates n-kind conductance. As temperature rise conductivity also rises confirming semiconducting nature of sample. Activation energy reduces up to 0.1 mol % and enhances at higher copper amount. Thermoelectric power increases up to 0.1 mol % copper dopant sample and later decreases. The rise in thermoelectric power with rise in temperature confirming the uniform characterof the sample. The various performance parameter of PEC were examined with respect to varing dopant amount. Fill factor, ideality factor, short circuit current, open circuit voltage, and solar energy conversion enhances up to 0.1 mol% copper amount then reduces. The utility of this work is in improving the efficiency of PEC cell. The efficiency of doped sample is greater than undoped cadmium selenide.

The Technology and Storage Stability Studies of Yam Functional Food

In this paper, yam functional food technology and storage stability were studied, the results indicate that storage time and temperature on the results significantly higher than room temperature sample storage, cryogenic sample index changes significantly, the moisture content of the sample affect the sensory scores larger.

Characterization of Silver Binding in Cryptomelane by X-ray Absorption Spectroscopy

ABSTRACTUsing silver K-edge extended X-ray absorption fine structure (EXAFS) spectroscopy, two different samples of silver-containing manganese oxide were analyzed in the fluorescence mode. For the first sample, silver ions from solution were sorbed onto one synthetic manganese oxide phase, namely cryptomelane (KxMn8O16, where l<x<2). The second sample was a silvermanganese oxide from Colorado. From the EXAFS analysis, silver was found to occupy two different sites in the synthetic sample. The natural samples from Colorado also exhibited a very similar coordination distances as the synthetic samples. In the low temperature spectrum of the synthetic sample at 10 K, the Ag-O peak was found to be missing and the amplitude of the Ag- Ag peak was approximately three times larger than the corresponding room temperature sample.