HORTICULTURE SCIENCE
APPLICATION OF NANO TECHNOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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electrons react to photons in a limited wavelength range
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some energy from the photons is converted to heat
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some electrons do not flow through the wire to make electricity
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all of these answers
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Detailed explanation-1: -Some photons that hit a solar cell are reflected away from the cell’s surface. Out of those photons that are absorbed, some have their energy turned into heat in a process of internal recombination instead of producing electric current. These efficiency losses are inevitable.
Detailed explanation-2: -Will solar panels ever reach 50 percent efficiency? Maybe! Researchers say that he technology used by NREL to create solar cells with 47.1 percent efficiency can be fine-tuned to reach 50 percent efficiency in the future.
Detailed explanation-3: -The competing factors responsible for this upper limit of the conversion efficiency are ray-optics based light-trapping and intrinsic loss due to Auger charge-carrier recombination9, 10. The thicker the cell, the more light is absorbed.
Detailed explanation-4: -PV conversion efficiency is the percentage of incident solar energy that is converted to electricity. Though most commercial panels have efficiencies from 15% to 20%, researchers have developed PV cells with efficiencies approaching 50%.