text: The Einstein relation's most important application is in these materials because it sets the ratio of diffusivity and mobility equal to k T over q. Wafers of one type of this material are grown with the Czochralski process.
full_question: The Einstein relation's most important application is in these materials because it sets the ratio of diffusivity and mobility equal to k T over q. Wafers of one type of this material are grown with the Czochralski process. III-V ("three five") and II-VI ("two-six") alloys are used to form the binary, ternary, and quaternary "compound" types of this material. Analyzing these materials often involves determining the rate and type of carrier generation and (*) recombination processes. These materials are useful because substitutional impurities can change their Fermi level in a process called doping, which can create its n-type and p- type. The most commonly used example of this material is silicon. For 10 points, name these materials that have a conductivity intermediate between that of conductors and insulators.
first_sentence: The Einstein relation's most important application is in these materials because it sets the ratio of diffusivity and mobility equal to k T over q. Wafers of one type of this material are grown with the Czochralski process.
raw_answer: semiconductors