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GEORGI NADJAKOV
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P H O T O E L E C T R E T S
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Academician Georgi Nadjakov discovered permanent internal photo-polarization in 1937. He made a electret with light and electricity. The new electret was called photo-electret. The previous type of electret, obtained by heat and electricity, were called by him thermoelectret. 
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Discovering the photoelectret state was the most considerable result of academician Georgi Nadjakov. It was formally recognized in Bulgaria after his death. 
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Created: 10 December 2004<BR>
Updated: 27 November 2008<BR>
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