3 publications
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Published Subscription
Controlled Texture of Magnetron Sputtered Transparent Conducting ZnO: Al Films for Solar Cell ApplicationsBy Himadri Sekhar Samanta, Rajesh Das
Abstract: Textured transparent and conducting ZnO:Al films were prepared by rf-magnetron sputtering on glass substrate at a temperature 3500C under Ar and Ar+O2 gas ambient. ZnO:Al thin films shows a minimum electrical resistivity of (~8.210-4 Ω-cm), and high optical transmittance (T~86–90% average) in visible region. With increasing of oxygen concentration ZnO:Al films become more compact, stoichiometric and becomes more electrically resistive. ZnO:Al shows hexagonal wurtzite polycrystalline structure with strong (002) orientations. …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 1, Issue 2, 2015 · pp. 12–19 Read article →
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Basic Fundamentals of Different Solar Cells, Solar Energy Materials and Photovoltaic PerformancesBy Rajesh Das, Himadari Shekhar Das, Surya Kanta Bhowmik
Abstract: Solar cell is one of the thrust areas of modern technology in the field of renewable energy. Crystalline semiconductor wafer based solar cells (SCs) (thicknesses almost 200–300 μm) mainly crystalline-Si or GaAs based solar cells are playing the legend role in last few decades. With technological revolution, thin film SCs (thickness range 1–2 μm), dye-sensitized or Graetzel, organic/polymer and plasmonic solar cell respectively are known as 2nd,3rd, 4th and 5th …
Published in International Journal of Energetic Materials · Vol. 1, Issue 1, 2015 · pp. 1–9 Read article →
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Blue Shift of Sol-gel Synthesized ZnO Nano-particles: Size Dependent Quantum Confinement EffectBy Rajesh Das
Abstract: Zinc oxide nano-crystals with different size and shape were synthesized by sol-gel technique at 90°C. ZnO nano-particles show (100), (002), (101), (102), (110), and (103) crystalline orientation and strong band-edge emission at 408 nm. Grain size of ZnO nano-crystals varies from 4 nm to 20 nm due to variation of molar ratio of polyethylene glycol with zinc acetate during synthesis. ZnO nano-materials with grain size 4 nm and 8 nm …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 1, Issue 1, 2015 · pp. 8–15 Read article →