semiconductor

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semiconductor bonds

electron hole: movement

p-n junction characteristics

solar energy; solar cell

Learn about the mining and purification of silicon

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Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

All 119 References in “We Didn’t Start the Fire,” Explained

The Prado Museum facade at the Diego Velaszquez memorial. Established in 1819, the museum is considered the best collection of Spanish art and one of the world's finest collections of European art. Madrid, Spain

20 Paintings You Have to Visit at the Museo del Prado in Madrid

Alpaca and Llama side by side

What’s the Difference Between Llamas and Alpacas?

Alfred Nobel on a large reproduction of the obverse side of the Nobel Prize medal for Peace on the exterior of Nobel Peace Center opened in Oslo, Norway June 11, 2005 to learn about Nobel Peace Prize Laureates and the history of Alfred Bernhard Nobel.

How Do You Get a Nobel Prize?

Still from Star Wars 1977 from left to right Mark Hamill as Luke Skywalker, Carrie Fisher as Princess Leia, Peter Mayhew as Chewbacca, and Harrison Ford as Han Solo

The 40th Anniversary of Star Wars

World Data Locator Map: Australia

Is Australia an Island?

Statue of Nostradamus

Nostradamus and His Prophecies

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While You Were Sleeping: 5 stories you might have missed, April 14, 2025 • Apr. 14, 2025, 3:58 AM ET (Straits Times)

Photos and Videos

semiconductor bonds

electron hole: movement

p-n junction characteristics

solar energy; solar cell

Learn about the mining and purification of silicon

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Topics

extrinsic semiconductor junction effect critical concentration of impurities majority carrier metal-oxide semiconductor n-type semiconductor p-type semiconductor hopping process minority carrier silicon wood plastic abrasive glass metamaterial metal industrial ceramics materials science materials testing recycling

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Key People

Haldane, Duncan

Duncan Haldane

British-born American physicist

Yves-André Rocard

French mathematician and physicist

Brattain

Walter H. Brattain

American physicist

Quiz

cigar. cigars. Hand-rolled cigars. Cigar manufacturing. Tobacco roller. Tobacco leaves, Tobacco leaf

Building Blocks of Everyday Objects

battery. Illustration of battery connected to lightbulb. Power a light bulb with a battery. Battery, Power Supply, Science, Circuit, Currents

Electricity: Short Circuits & Direct Currents