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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.
Show that the Nusselt number for a sphere in a quiescent fluid is 2. Hint: Write the thermal resistance for the outer surface of the sphere in terms as both conductive and conve
How to set out a scientific report and include a collection and analysis of data to support my claims/findings. I am making a model and videoing it, i am wondering how to do a scie
As CPH has mass, how massless photon is made of two or more CPH? Answer; The Photon carries energy and energy has mass. But the rest mass of photon is aero. No one can see phot
what is gravitational law
A man exerts a northward force of 100 newtons on a 50 kilogram box which sits on a level floor. If the frictional force is 80 newtons. What is the magnitude of the northward
You may find parts of this question similar to the \Landing on an Alien World" activity that we did some time ago in class. Start by opening the \Maze Game" activity. You can find
You have two pendulums and you release them at the same time. Pendulum A has mass 2 m attached to it and you release it from 5 . Pendulum B has mass 3 m attached to it and you rele
when do we use projected area instead of actual area and why
Circuits involving capacitive decay: Consider the circuit shown below. Depending on the time constant of the circuit, relative to the period of the square wave applied to it,
Explain Brewster's experiment and describe how Brewster's law was formulated.
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