Diodes are designed to conduct electrons in one direction but do not generate power at ambient or any temperature, as they only facilitate the flow of existing electrons under electrical potential. Unlike LEDs, which emit light when electrons and holes recombine at the junction, diodes do not create new charge carriers. The conduction process relies on pre-existing electrons and holes, which must originate from another source. This distinction highlights that diodes function primarily as conductors rather than power sources. Understanding this mechanism clarifies why diodes are not considered a source of power generation.
