intrinsic semiconductor
LowFormal, Technical, Academic
Definition
Meaning
A pure semiconductor material whose electrical conductivity is determined solely by the inherent properties of the material and thermal excitation of electrons.
A semiconductor in its pure, undoped state, where the number of free electrons and holes is equal, resulting in relatively low conductivity that increases with temperature.
Linguistics
Semantic Notes
The term is foundational in solid-state physics and electronics. It contrasts directly with 'extrinsic semiconductor', which has been doped with impurities. The concept is central to understanding semiconductor band theory and device operation.
Dialectal Variation
British vs American Usage
Differences
No lexical or orthographic differences. Both dialects use the identical term.
Connotations
Identical technical meaning. Slight potential variation in pronunciation.
Frequency
Exclusively used in technical fields (physics, engineering). No significant frequency difference between dialects.
Vocabulary
Collocations
Grammar
Valency Patterns
[An] intrinsic semiconductor [has/conducts/shows/behaves as]...The [property/behaviour/conductivity] of [an] intrinsic semiconductor...[To dope/to alter] an intrinsic semiconductor...[Unlike/Compared to] an extrinsic semiconductor, an intrinsic semiconductor...[At high temperatures], the intrinsic semiconductor...Vocabulary
Synonyms
Strong
Neutral
Vocabulary
Antonyms
Usage
Context Usage
Business
Rare, except in high-level discussions of semiconductor manufacturing supply chains or materials sourcing.
Academic
Core term in physics, materials science, and electronic engineering lectures, textbooks, and research papers.
Everyday
Virtually never used.
Technical
Fundamental term in electronics design, chip fabrication, and solid-state physics research and development.
Examples
By Part of Speech
verb
British English
- The material was carefully purified to intrinsic semiconductor at very high temperatures.
American English
- Engineers can intrinsic semiconductor a silicon wafer through zone refining.
adjective
British English
- The intrinsic semiconductor properties of germanium were studied.
American English
- We measured the intrinsic semiconductor behaviour of the sample.
Examples
By CEFR Level
- An intrinsic semiconductor is a very pure material.
- Silicon can be an intrinsic semiconductor.
- Its conductivity is not very high.
- In an intrinsic semiconductor, the number of electrons and holes is naturally equal.
- Heating an intrinsic semiconductor increases its conductivity.
- Pure germanium is a classic example of an intrinsic semiconductor.
- The Fermi level in an intrinsic semiconductor lies precisely at the midpoint of the band gap.
- The carrier concentration in an intrinsic semiconductor follows an exponential dependence on temperature and band gap energy.
- Before doping, the silicon wafer must first be processed into a high-quality intrinsic semiconductor.
Learning
Memory Aids
Mnemonic
Think INTRINSIC = INside TRue, Naturally Semiconducting. It's the pure, natural form of the material, not changed from the outside.
Conceptual Metaphor
A pristine, untouched landscape (the intrinsic semiconductor) versus a landscape modified with specific features like mines or farms (the extrinsic, doped semiconductor).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Прямой перевод 'внутренний полупроводник' является калькой и не является стандартным термином. Правильный перевод: 'собственный полупроводник'.
- Не путать с 'i-тип полупроводника' (i-type), что является синонимом.
- Концепт 'чистоты' материала (pure, undoped) является ключевым, а не идея 'внутренности'.
Common Mistakes
- Confusing 'intrinsic' with 'integrated' or 'internal'.
- Using 'intrinsic' to describe semiconductors that have been lightly doped (they are no longer intrinsic).
- Misspelling as 'intrensic' or 'intrinsec'.
- Pronouncing 'semiconductor' with stress on the first syllable ('SEMIconductor').
Practice
Quiz
What primarily determines the conductivity of an intrinsic semiconductor?
FAQ
Frequently Asked Questions
No. Silicon in its natural state is not pure enough. It must be refined to an extremely high purity (e.g., 'electronic grade') to behave as an intrinsic semiconductor. Most silicon used in devices is deliberately doped (extrinsic).
Because the number of charge carriers (free electrons and holes) generated solely by thermal energy is relatively small at room temperature compared to a doped material.
Intrinsic semiconductors are pure and undoped, with conductivity determined by the material itself. Extrinsic semiconductors have been doped with specific impurities to deliberately alter and control their electrical conductivity (creating n-type or p-type materials).
No, by definition, a semiconductor has conductivity between that of a conductor and an insulator. An intrinsic semiconductor has the lowest conductivity for that material. To become a good conductor, it would need to be heavily doped or changed into a different state (e.g., a metal).