Energy & Green Tech

How a surface treatment improves the inside of a solar cell

Physicists from the University of Luxembourg with European experts have succeeded in explaining the recent efficiency improvements in thin film solar cells. The work of the whole consortium has been published in the prestigious ...

Business

Dutch tech firm caught in US-China row

Dutch computer chip machine manufacturer ASML found itself on Friday at the centre of a row between Beijing and Washington over the delivery of a hi-tech system to China.

Machine learning & AI

Brain-like network uses disorder to detect order

A disordered network that is capable of detecting ordered patterns: This sounds contradictory, but it comes close to describing the way the brain works. Researchers of the University of Twente have developed a such brain-inspired ...

Electronics & Semiconductors

Researchers discover new two-dimensional semiconductor

Researchers of Valencia Unviersity (UV) have discovered a two-dimensional semiconductor that has its excitons orientated in a novel way, paving the way for the generation of integrated photonic chips.

Electronics & Semiconductors

Bending an organic semiconductor can boost electrical flow

Slightly bending semiconductors made of organic materials can roughly double the speed of electricity flowing through them and could benefit next-generation electronics such as sensors and solar cells, according to Rutgers-led ...

Business

End of an era as Japan's Panasonic exits chip business

Japanese electronics giant Panasonic said Thursday it was exiting the semiconductor business, selling its loss-making subsidiary to a Taiwanese firm as it struggles with intense competition from China and South Korea.

Electronics & Semiconductors

New efficiency world record for organic solar modules

A research team from Nuremberg and Erlangen has set a new record for the power conversion efficiency of organic photovoltaic (OPV) modules. The scientists designed an OPV module with an efficiency of 12.6 percent over an ...

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Semiconductor

A semiconductor is a material that has a resistivity value between that of a conductor and an insulator. The conductivity of a semiconductor material can be varied under an external electrical field. Devices made from semiconductor materials are the foundation of modern electronics, including radio, computers, telephones, and many other devices. Semiconductor devices include the transistor, solar cells, many kinds of diodes including the light-emitting diode, the silicon controlled rectifier, and digital and analog integrated circuits. Solar photovoltaic panels are large semiconductor devices that directly convert light energy into electrical energy. In a metallic conductor, current is carried by the flow of electrons. In semiconductors, current can be carried either by the flow of electrons or by the flow of positively-charged "holes" in the electron structure of the material.

Silicon is used to create most semiconductors commercially. Dozens of other materials are used, including germanium, gallium arsenide, and silicon carbide. A pure semiconductor is often called an “intrinsic” semiconductor. The conductivity, or ability to conduct, of semiconductor material can be drastically changed by adding other elements, called “impurities” to the melted intrinsic material and then allowing the melt to solidify into a new and different crystal. This process is called "doping".

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