Ihe mejupụtara diode bụ njikọ PN, na photodiode nwere ike ịtụgharị mgbama ngwa anya ka ọ bụrụ akara eletrik, dị ka egosiri n'okpuru:
Na-emekarị, njikọ covalent na-ionized mgbe PN junction na-enwu na ìhè.Nke a na-emepụta oghere na ụzọ abụọ eletrọn.A na-emepụta fotocurrent n'ihi ọgbọ nke otu oghere eletrọn.Mgbe foton nwere ike karịrị 1.1 eV kụrụ Diode, a ga-emepụta ụzọ abụọ-oghere eletrọn.Mgbe foton batara na mpaghara Diode mebiri emebi, ọ na-eji ike dị elu na-akụtu atọm ahụ.Nke a na-ebute ntọhapụ nke electrons site na nhazi atomic.Mgbe a tọhapụrụ electrons, a na-emepụta electrons na oghere efu.N'ozuzu, eletrọn na-na-adịghị mma, na oghere na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-na-akwụ ụgwọ.Ike agwụla ga-enwe oghere eletrik arụnyere n'ime ya.N'ihi oghere eletrik a, ụzọ eletrọn-hole dị anya site na njikọ PN.Ya mere, oghere na-aga n'ihu na anode, na electrons na-aga n'ihu na cathode iji mepụta photocurrent.
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Ihe nke photodiode na-ekpebi ọtụtụ njirimara ya.Njirimara dị mkpa bụ ebili mmiri nke photodiode na-aza, nke ọzọ bụ ọkwa mkpọtụ, nke abụọ dabere na ihe eji eme ihe na photodiode.Ihe dị iche iche na-eji nzaghachi dị iche iche na ogologo ogologo n'ihi na ọ bụ naanị photons nwere ike zuru oke nwere ike ime ka electrons dị na oghere nke ihe ahụ ma na-emepụta ike dị ukwuu iji mepụta ugbu a site na photodiode.
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Ọ bụ ezie na nhụsianya ihe dị n'ogologo ogologo oge dị mkpa, ihe ọzọ nwere ike imetụta arụmọrụ nke photodiodes bụ ọkwa mkpọtụ a na-emepụta.N'ihi ọdịiche ha dị ịrịba ama, silicon photodiodes na-emepụta obere mkpọtụ karịa germanium photodiodes.Otú ọ dị, ọ dịkwa mkpa iji tụlee ogologo oge nke photodiode, na germanium photodiode ga-eji maka ogologo ogologo ogologo karịa 1000 nm.
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Ihe dị n'elu bụ nkọwa ihe ọmụma nke Diode nke Shenzhen HDV Phoelectron Technology Co., Ltd., bụ onye na-emepụta nkwurịta okwu anya ma na-emepụta ngwaahịa nkwukọrịta.Nabata gịajuju.