Ha hona joale e feta ka seketsoana, lielektrone tse semiconductor ea mofuta oa N le masoba a semiconductor ea mofuta oa P li thulana ka matla 'me li kopana hape ka lera le ntšang khanya ho hlahisa li-photon, tse hlahisang matla ka mokhoa oa photon (ke hore. , leseli leo bohle ba le bonang).Li-semiconductors tsa lisebelisoa tse fapaneng li tla hlahisa mebala e fapaneng ea leseli, joalo ka leseli le khubelu, leseli le letala, leseli le leputsoa joalo-joalo.

Pakeng tsa mekhahlelo e 'meli ea li-semiconductors, lielektrone le masoba lia thulana ebe lia kopana hape ebe li hlahisa li-photon tse putsoa lera le ntšang khanya.Karolo ea khanya e putsoa e hlahisoang e tla hlahisoa ka ho toba ka ho roala ha fluorescent;karolo e setseng e tla otla lesela la fluorescent le ho sebelisana le eona ho hlahisa li-photon tse mosehla.Photon e putsoa le photon e mosehla li sebetsa hammoho (tse tsoakaneng) ho hlahisa leseli le lesoeu.