For people involved in nanomaterials research and all other types of nanostuff; solar, nanoelectronics, nanoethics, quantum communications and amazing stuff.

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Comment by N R Karthikeyan on June 5, 2009 at 6:27am
wow.... thats a wonderful explanation... thanks.... bt the point.. am i material engineer.... to my understanding... u mean to say if we can somehow tune down the energy requirement to eject photons..... probably the efficiency may get increase rite ?...

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Comment by Kiran Kumar V S on June 5, 2009 at 6:13am
@ Karthikeyan

Solar Power Plants work on either Photoelectric effect i.e Photovoltaic cell or convert water into steam and then into electricity.

In photovoltaic cells Not all the solar energy is directly converted into power as some of the energy is used in ejecting photo electrons..and the energy used to eject photo electrons is property of the material used i.e work function of the material. Most of the photovoltaic cells are made of silicon which has a work function of 4.52 ev. Hence 4.52 ev amount of the energy is used to eject electrons itself and the rest is used by the electrons as kinetic energy, which generates current. But electrons tend to loose some of its kinetic energy by collisions. Hence the efficiency is very less.

When it comes to converting solar energy into steam, and then into electricity, it works like the steam engine of the olden days.....and you imagine the rest... ;-)

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Comment by N R Karthikeyan on June 5, 2009 at 5:13am
Hi everyone

What is the main reason for reduced efficiency in solar power plants ?

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Comment by K.BALA BHASKAR on January 2, 2009 at 6:38pm
researching the organic solar cell is the promising technologyfor the future and humans can also be the primary producers of food or energy by this technology and half the the global energy needs can be fulfilled by this idea.

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Comment by Tunde Kovacs on October 26, 2008 at 9:35pm
The people are curious of everything and the researchers are the most curious people ...:-)

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