Diode imapangidwa ndi mphambano ya PN, ndipo photodiode imatha kusintha chizindikiro cha kuwala kukhala chizindikiro chamagetsi, monga momwe zilili pansipa:
Kawirikawiri, covalent chomangira ndi ionized pamene PN mphambano aunikiridwa ndi kuwala.Izi zimapanga mabowo ndi ma electron awiriawiri.Photocurrent imapangidwa chifukwa cha kupanga magulu a electron-hole.Ma photon okhala ndi mphamvu yoposa 1.1 eV akagunda Diode, ma electron-hole pairs amapangidwa.Photon ikalowa m'dera lomwe latha la Diode, imagunda atomuyo ndi mphamvu yayikulu.Izi zimabweretsa kutulutsidwa kwa ma electron kuchokera ku atomiki.Ma electron akatulutsidwa, ma elekitironi aulere ndi mabowo amapangidwa.Nthawi zambiri, ma elekitironi ali ndi mlandu wolakwika, ndipo mabowo amaperekedwa bwino.Mphamvu zowonongeka zidzakhala ndi malo opangira magetsi.Chifukwa cha gawo lamagetsi ili, ma electron-hole awiri ali kutali ndi mphambano ya PN.Choncho, mabowo amasunthira ku anode, ndipo ma electron amapita ku cathode kuti apange photocurrent.
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Zida za photodiode zimatsimikizira zambiri za makhalidwe ake.Chofunikira kwambiri ndi mawonekedwe a kuwala komwe photodiode imayankhira, ndipo ina ndi phokoso la phokoso, zomwe zimadalira makamaka zipangizo zomwe zimagwiritsidwa ntchito mu photodiode.Zida zosiyanasiyana zimagwiritsa ntchito mayankho osiyanasiyana ku kutalika kwa mafunde chifukwa ma photon okhawo omwe ali ndi mphamvu zokwanira amatha kusangalatsa ma elekitironi mumpata wa bandi wazinthu ndikupanga mphamvu yayikulu kuti apange pano kuchokera ku photodiode.
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Ngakhale kukhudzika kwa mawonekedwe azinthu ndizofunika, gawo lina lomwe lingakhudze kwambiri magwiridwe antchito a photodiode ndi kuchuluka kwa phokoso komwe kumapangidwa.Chifukwa cha kusiyana kwawo kwakukulu kwa bandi, ma silicon photodiode amatulutsa phokoso locheperako kuposa ma germanium photodiodes.Komabe, m'pofunikanso kuganizira kutalika kwa mawonekedwe a photodiode, ndipo photodiode ya germanium iyenera kugwiritsidwa ntchito kwa mafunde otalika kuposa 1000 nm.
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Zomwe zili pamwambazi ndi kufotokozera kwa chidziwitso cha Diode chomwe chinabweretsedwa ndi Shenzhen HDV Phoelectron Technology Co., Ltd., yomwe ndi makina opanga mauthenga opangidwa ndi kuwala ndipo imapanga zinthu zoyankhulirana.Takulandirani kukufunsa.