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Organic solar cells and OLEDs--A comparison of two competing approaches

Authored on: Feb 1, 2012 by Martin Pfeiffer

Technical Paper

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Two basic, yet different, approaches are available for fabricating elements such as OLEDs or solar cells from thin layers of organic materials with semiconductor properties: namely, (a) the use of polymers, i.e., long-chain molecules that consist of a large number of identical repeating units (monomers) in which the exact number of repeating units in a material is subject to fluctuation, and (b) the use of "small molecules". This paper compares the two.
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prabhakar_deosthali Posted Mar 15, 2012

Development of organic PV cells is a very encouraging new energy generation alternative. However the efficiency of just 3-4 % is not enough for this technology to go commercial.

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peter.clarke Posted Jul 11, 2012

Heliatek is claiming greater than 10 percent efficiency. And this compares with 20 percent efficiency in silicon PV. However the nature of the way efficiency is measured at 25 degress C and the low light and high temperature efficiencies of the technologies make direct comparison difficult. My understanding is that organic PV is never lower than its stated efficiency and is often higher, while silicon PV efficiency is often much lower than its stated efficiency. And OPV can be much lighter.

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