{"id":10126,"date":"2026-07-10T11:35:38","date_gmt":"2026-07-10T09:35:38","guid":{"rendered":"https:\/\/personalleasing-osteuropa.de\/?page_id=10126"},"modified":"2026-07-11T07:28:10","modified_gmt":"2026-07-11T05:28:10","slug":"semiconductor","status":"publish","type":"page","link":"https:\/\/personalleasing-osteuropa.de\/en\/wissen\/halbleiter\/","title":{"rendered":"Semiconductors \u2013 Basics, Properties, and Applications in Electronics"},"content":{"rendered":"

What are semiconductors?<\/h2>\n

Semiconductors are materials whose electrical conductivity lies between that of conductors (e.g., copper) and insulators (e.g., glass). They play a central role in modern electronics. Semiconductors differ from other materials in one important detail. Normally, materials can be classified into one of two categories: either they conduct electricity or they do not. Metals, for example, conduct electricity, while insulators do not. Semiconductors fall exactly in between.<\/p>\n

Semiconductors do not conduct electricity as well as metals, but they also do not block it completely like insulators. Therefore, they occupy an important position between these two extremes. The conductivity of a semiconductor\u2014that is, how much current can actually flow\u2014depends on various factors: temperature, doping, and the applied voltage.<\/p>\n

A Comparison of the Most Important Semiconductor Materials<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n
Material<\/th>\nType<\/th>\nFeatures<\/th>\nTypical Application<\/th>\nStatus<\/th>\n<\/tr>\n<\/thead>\n
Silicon (Si)<\/strong><\/td>\nInorganic semiconductors<\/td>\nStable, cost-effective, widely used, easy to work with<\/td>\nTransistors, microchips, solar cells, diodes<\/td>\nPredominant Material<\/td>\n<\/tr>\n
Germanium (Ge)<\/strong><\/td>\nInorganic semiconductors<\/td>\nHigher charge carrier mobility than Si, more temperature-sensitive<\/td>\nEarly transistors, special high-frequency applications<\/td>\nLargely replaced by silicon<\/td>\n<\/tr>\n
Gallium arsenide (GaAs)<\/strong><\/td>\nCompound Semiconductor<\/td>\nHigh electron mobility, direct bandgap<\/td>\nHigh-frequency transistors, laser diodes, cellular communications<\/td>\nSpecialty Markets<\/td>\n<\/tr>\n
Gallium nitride (GaN)<\/strong><\/td>\nCompound Semiconductor<\/td>\nHigh breakdown voltage, efficient at high temperatures<\/td>\nLEDs (blue lights), power electronics, 5G systems<\/td>\nGrowing, Future Technology<\/td>\n<\/tr>\n
Silicon carbide (SiC)<\/strong><\/td>\nCompound Semiconductor<\/td>\nHigh thermal stability, high breakdown strength<\/td>\nElectric vehicles, rail propulsion systems, wind energy<\/td>\nRapidly growing<\/td>\n<\/tr>\n
Indium phosphide (InP)<\/strong><\/td>\nCompound Semiconductor<\/td>\nHigh electron mobility, efficient light emission<\/td>\nTelecommunications, Fiber-Optic Technology, Infrared Lasers<\/td>\nniche market<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Semiconductors are usually made of silicon or germanium. The structure of their atoms allows them to form crystal lattices, which, together with their electrons, provide electrical conductivity. Silicon is by far the most widely used material, as it is characterized by low manufacturing costs and very stable properties. Germanium was particularly important in the early days of semiconductor technology, but has since been largely replaced by silicon and is now used only in specific applications. Compound semiconductors such as gallium nitride, gallium arsenide, and indium phosphide are used in applications where silicon, with its physical properties, does not provide an adequate solution\u2014for example, in optoelectronics.<\/p>\n<\/div><\/div>

What are the properties of semiconductors?<\/h2>\n

Semiconductors have several distinctive properties that set them apart from conductors and insulators and make them ideal for a wide range of applications in electronics.<\/p>\n

1. Bandgap<\/h3>\n

The band gap\u2014also known as the energy band gap\u2014is a flexible region through which no current flows. The width of this gap depends on the specific semiconductor material. Metals have no band gap at all, while the band gap in insulators is very large. In semiconductors, it lies somewhere in between and can be specifically controlled\u2014this is the crucial difference that makes them so valuable for electronics.<\/p>\n

2. Endowment<\/h3>\n

Doping consists of impurity atoms that are specifically added to the semiconductor material to control its conductivity. This results in two basic types:<\/p>\n