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Organic & polymer solar cells are made from thin films (typically 100nm) of organic semiconductor such as polymer and small molecule compounds like poly phenylene vinylene, copper phthalocyanine a blue or green organic pigment and carbon fullerenes. The energy conservation efficiency of data using conductive polymer are low at 4-5% efficiency for the best cells to data. Though, these cells could be helpful in some applications where mechanical flexibility and disposability are significant. The invention of conductive polymer has leaded the development of much cheaper cells which are based on inexpensive plastics. However all organic solar cells made of data suffer from degradation upon exposure to UV light, and hence have lifetimes which are far too short to be viable. The conjugated double bond systems in the polymers, which take the charge, are all the time susceptible to breaking up when radiated with shorter wavelengths. Additionally, most conductive polymer, being highly unsaturated and reactive, are highly sensitive to atmospheric moister and oxidation, making commercial applications difficult.
Q. What is quantum mechanical "Tunneling"? Give one example. OR What do you mean by quantum mechanical tunneling? Show that the tunneling probability is given by the
A ram-air intake is any intake design which uses the dynamic air pressure produced by vehicle motion to increase the static air pressure inside of the intake manifold on an engine,
explanation on polymers tga curves
Q. Define the unit of self inductance. One henry is described as the self-inductance of a coil in which a change in current of one ampere per second produces an opposing emf of
Briefly explain how elliptically and circularly polarized light is generated. Describe the process for realization of plane polarized light from elliptically polarized light.
Average and Instantaneous Acceleration: Average acceleration is explained as the change in velocity over a given time interval. As, The instantaneous acceleration of g
Planck equation The quantum mechanical equation relating to the energy of a particular photon E to its frequency nu: E = h nu.
Casting : Fe-C alloys with more than 2% carbon are known as cast irons. On crossing the liquidus, proeutectic crystallizes first. On passing by the eutectic temperatures, the liqui
what is the time period of a liquid in U tube ?
Measuring with a Micrometer Caliper A simple animation of using a micrometer to measure the width of a pencil.
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