B P Chandra
Articles written in Bulletin of Materials Science
Volume 17 Issue 4 August 1994 pp 429-437
Photovoltaic performance of semiconductor-liquid junction solar cell using electro-codeposited thin film
Volume 26 Issue 5 August 2003 pp 537-541 Polymers
Vickers microhardness indentation technique has been employed to detect the photoplastic effect in the transparent polycarbonate specimens in darkness and under mercury illumination. For low applied loads, the hardening of specimens under illumination confirms the positive photoplastic effect that causes illumination-induced increase of crosslinking (in polymer). For high applied loads the positive photoplastic effect decreases as the level of microhardness decreases.
Volume 27 Issue 6 December 2004 pp 505-509 Optical Properties
In practice, the relative efficiencies of different crystals are often determined under identical conditions of temperature and excitation. If the temperature of a crystal is increased or decreased with respect to room temperature, luminescence efficiency may get increased or decreased according to the composition of the crystal. When coloured crystals of NaCl, NaBr, KCl and KBr are excited by pulse-induced excitation at different temperatures, the mechanoluminescence (ML) intensity increases with temperature. The ML intensity of first peak, 𝐼ml, second peak, 𝐼_m2 and the total ML intensity, 𝐼T, initially increase with temperature and then tend to attain an optimum value for a particular temperature of crystals. The ratio, 𝐼m2/𝐼ml, is found to increase with increasing temperature of the crystals. The expression derived on the basis of rate equations, are able to explain the temperature dependence of ML intensity on several parameters.
Volume 42 | Issue 5
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