167x Filetype PPTX File size 0.65 MB Source: u.osu.edu
Overview ○History of solar cells ○Current solar cells ○Cell structure and designs ○Organic vs Inorganic cells ○Concentrating Sunlight ○Thermodynamic cycles ○Innovations ○Conclusions ! O at Cool Facts e N ○We are able to utilize 85% of the sun’s energy in theory (but as of now our technology only allows us to harness about 25%) ○The 15% we can’t utilize is dissipated in the atmosphere. History of Solar Cells ○ 1839 – Alexandre Edmond Becquerel observed the photovoltaic effect through an electrode in a conductive solution which was exposed to light ○ 1883 – Charles Fritts developed a solar cell using selenium and a thin layer of gold foil to form a device that had less than 1% efficiency ○ 1954 – April 25, Bell Labs announced the first practical silicon solar cell which had 6% efficicency ○ 1985 – 20% efficienct solar cells were created by the Centre for Photovoltaic Engineering at the University of New South Wales Current Solar Cells ○2012 – 3D PV cells with 30% + energy efficiency (still relatively inefficient) ○Takes many panels to produce the power needed for large populations ○Fragile and don’t have long shelf lives Cell Structure and Design Large grain solar ○ cells8 ○Periodic silver nanowires4 Types of Solar Panel http://www.c-changes.com/types-of-solar-panel
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