Yadda forward bias da reverse bias su fuskanta diodes da LEDs?

Fahimtar yadda karama suka yi diyodai da LED yana bukatar fahimtar yadda halayen kuma mai ƙarfi na elektriki suka yi a cikin yadda suka yi. Kuma mai ƙarfi da kuma mai ƙarfi a ƙasa suna kama mahaillinsu na karama wanda suka yi a cikin yadda suka yi, suka yi kuma kuma mai ƙarfi, ko suka tsofata kuma mai ƙarfi. Yadda kuma mai ƙarfi na karama da yadda karama suka yi shi ne mahaillinsu don hakan ya sa kamar yadda karama suka yi, kuma mai ƙarfi na karama, da kuma tsarin karama. Wannan rubutu ta bayani yadda kuma mai ƙarfi suka yi a cikin karama, kuma mai ƙarfi na karama, da kuma tsarin karama.

Fisiks na kariya mai zuwa kuma kariya mai ƙasa yana aiki a wani ƙarfi na tsakara na kayan aikin semiconductor a cikin diodes da kayan aikin samun rufe. Idan kariya mai zuwa ta daga karamin + ta fara a karamin p kuma kariya mai ƙasa ta daga karamin - ta fara a karamin n, kuma kariya mai zuwa zai faru, wanda ke ba da imkanin kariya ya tattara kuma yana ba da damar LED da dukkan hali na saukarwa da aikin sa. A matsayin hakan, kariya mai ƙasa ta ba da kariya mai ƙasa a karamin p kuma kariya mai zuwa a karamin n, wanda ke haifar da kariya mai tattara kuma yana haifar da karamin fuskantar. Fasahar wannan mekanism zai taimaka wajen amfani da kayan aikin samun rufe na semiconductor don ayyukan bayanai kuma yana taimaka wajen gudanar da saukarwarsu a cikin kayan aikin elektronsi.

Mekanismin kariya mai zuwa da kariya ta tattara

Yadda kariya mai zuwa ta bada imkanin kariya

Kafin kariya a cikin diodes da leds yana daga wani kariya da aka fiye ne ya zama ƙarfi ga kariya na jikin. Kafin kariya ta fuskanci na gaba yayi amfani da kafin kariya na p-type da kafin kariya na n-type, wanda ya haɗa shirin da suka yi amfani da electrons da holes su taimaka a cikin jiki da su kuma su kawo kariya. Wannan kawo kariya ya bayyana kariya a matsayin hankali ko almakuri, tare da abu na semiconductor da nau'in abu. Don abubuwan da suka fiye ne almakuri, wannan bayyana kariya ya zama almakuri da suka fiye ne, wanda ke nufin cewa kafin kariya shine shirin da LED da sauran abubuwan da suka fiye ne suke amfani da su.

Almakuri da Bayyana Kariya

Yan kuma aikin da suka gudan, kuma suka taimaka wajen yin foton. Tsawo na tsinku da ragin wannan iluminashin yana daga cikin ƙarfi na band gap na semiconductor da composition na matali. Matali na farko suka haɗa da ragin: gallium arsenide ta haɗa da infrared, gallium nitride ta haɗa da blue da ultraviolet, kuma aluminum indium phosphide ta haɗa da red da amber light. Kuma kuma efficiency da performance na LED na wannan semiconductor light emitting devices suka faru sosai lokacin da forward bias voltage aka fitar da ita don matali na farko, domin samun foton mai yawa don amfanin current.

Reverse Bias da Blocking Characteristics

Application na Reverse Bias Voltage

Kafin kariya ta zama wani hali da ke bawa shugaban yadda kuma kariya ta daga jikin diode ta zama mai ƙarfi. Alama na negatif ta gudan cikin kariya na p-kariya kuma alama na positif ta gudan cikin kariya na n-kariya, wanda ke sa kariya na kariya su yi kariya daga jikin kariya kuma su rarraba kariya na kariya. Wannan haɗin kariya ya tsara kariya na kariya a cikin diodes da leds, wanda ke sa kariya ta aiki ne a matsayin kariya na kariya. Haɗin kariya na kariya ta zama mahimmanci don amfanin photodiode, inda diodes da leds da aka taimaka su a matsayin sensors su kashe kariya na kariya don gano kariya na photons da su haɗa kariya na kariya da kariya.

Kariya da Zener

A cikin ƙananan yadda ake sauyi kuma yadda ake sauyi ta hanyar rarraba, shi ne ya zama mai tsoro don zama daidai da yadda ake sauyi ta hanyar rarraba, inda alama na kuma yadda ake sauyi suka samu yadda ake sauyi don gudun kuma yadda ake sauyi, kuma yana zama daidai da yadda ake sauyi. Wannan ƙananan yadda ake sauyi zai iya gudun kuma yadda ake sauyi a cikin yadda ake sauyi ta hanyar rarraba amma a cikin Zener diodes yana a sanya daidai da yadda ake sauyi don fayilin yadda ake sauyi. A cikin photodiode, yadda ake sauyi ta hanyar rarraba tana amincewa don zama daidai da yadda ake sauyi ta hanyar rarraba wanda ke bada damar yadda ake sauyi daidai da yadda ake sauyi kuma yana kara yadda ake sauyi don yadda ake sauyi. Fasahar yadda ake sauyi daidai da yadda ake sauyi kuma yadda ake sauyi suna da mahimmanci don amincewa cikin yadda ake sauyi kuma don gudun kuma yadda ake sauyi don semiconductor light emitting devices kuma photodiodes.

Yadda ake sauyi daidai da yadda ake sauyi don yadda ake sauyi kuma yadda ake sauyi

Kara yadda ake sauyi don LED

Ingancin haske da kuma aikin hasken wuta yana dogara ne akan ingantaccen ƙaddamarwa a cikin iyakokin aiki mai lafiya. Matsayin ƙarfin lantarki mai yawa yana haifar da karuwar samar da zafi da rage fitarwa na photon a kowace naúrar shigarwar yanzu, rage rayuwar na'urar da rage yawan aiki. Daidaitaccen iyakancewar halin yanzu ta hanyar juriya ko tushen halin yanzu yana kiyaye karkatawar gaba a cikin mafi kyawun kewayon inda fitowar haske ke ci gaba da girma kuma damuwa mai zafi tana ci gaba da sarrafawa. Ana ƙaddamar da na'urorin samar da haske na semiconductor masu inganci don takamaiman ƙarfin lantarki da haɗin yanzu wanda ke haɓaka ƙwarewar LED da aiki yayin tabbatar da tsawon rayuwar aiki a aikace-aikacen aiki.

Abubuwan da ke cikin Sensor na Photodiode

Aikin da photodiode yana bukata amfani da reverse bias a matsayin ƙarfi don samun karamin fahimta da karamin ƙarfi na noise. Yadda ake saukin voltage na reverse bias yana zama ƙarfi, yana ƙarfi kuma karamin fahimta na charge collection efficiency, amma yana kuma ƙarfi karamin dark current da thermal noise. Aiki mai kyau na photodiode yana daga cikin voltage na reverse bias wanda ya bayyana shi manufacturer don aikin fahimta na light. Aikin semiconductor light emitting devices wanda aka raba su a matsayin sensors yana bukata amfani da bias mai kyau a lokacin rabin circuit don ba da aikin photodiode mai kyau a lokacin fahimta na light, optical communication, da imaging systems.

Babban Tambayoyi

Shin wani farko ne tsarin forward bias da reverse bias a diodes da leds?

Gabatarwa ta gaba tana amfani da ƙarfin lantarki mai kyau zuwa gefen p da kuma mummunan zuwa gefen n, rage ƙuntatawa da kuma ba da izinin gudana na yanzu da kuma hasken wuta. Juyawa na baya yana amfani da ƙarfin lantarki mara kyau ga gefen p da kuma tabbatacce ga gefen n, yana fadada yankin raguwa da toshe yanayin halin yanzu. Gabatarwa gaba shine yanayin aiki don LEDs da ke samar da fitowar haske, yayin da ake amfani da karkatar da karkatarwa a cikin aikace-aikacen photodiode da kewayon sarrafa ƙarfin lantarki.

Ta yaya tsinkaye na gaba ya shafi tasirin LED da aikin?

Daidaitaccen ƙarfin juyawa na gaba yana haɓaka haɗakar masu ɗaukar kaya a cikin na'urorin samar da haske na semiconductor, yana samar da mafi girman fitowar photon dangane da shigarwar yanzu. Matsayi mai yawa na gaba yana ƙara yawan samar da zafi kuma yana rage tasirin LED da aikin ta hanyar haifar da asarar zafi. Matsakaicin ƙarfin juyawa na gaba, wanda mai ƙera ya ƙayyade don diodes da LEDs, yana tabbatar da samar da haske mai kyau da tsawon rayuwar na'urar a aikace-aikace na yau da kullum.

Me kafin yadda ayyukan photodiode suna iya amfani da shari’i na reverse bias?

Shari’i na reverse bias a cikin ayyukan photodiode yana zama wani farin gaba mai ƙarfi wanda ya sa ayyukan photodiode suka dace da fotonai da suka zuwa, kuma yana taimakawa wajen samun kwayoyin charge da aka saba. Farin gaba mai ƙarfi yana ba da damu ga fotonai da suka zuwa domin samun kwayoyin electron-hole, wanda ke taimakawa wajen samun kwayoyin current da za a iya gano. Shari’i na reverse bias da aka bayyana a cikin ayyukan photodiode yana taimakawa wajen samun dacewa na sensitivity kuma yana taimakawa wajen kula da noise a cikin sensorai da systems na optical communication.