i understand doping, p and n type
i just don't get how it is used in solid state devices
there is no one dot pt dedicated to it,
e.g.
'A solid-state device is an electronic component or device that is composed chiefly or exclusively of solid materials, usually semiconducting, and that depends for its operation on the movement of charge carriers within it. The development of simple solid-state devices such as semiconductor diodes in the 1930’s eventually led to the development of the point contact transistor by Walter Brattain and John Bardeen in 1948. In the same year William Shockley proposed the idea of the junction (sandwich) transistor and by 1950 had turned the idea into reality.'
i don't get it