Ingancin ƙwayoyin hasken rana yana raguwa lokacin da haɗin gwiwar electron-hole ya sake haɗuwa kafin a iya amfani da su yadda ya kamata. Lokacin da semiconductor ya sha haske a tsayin da ya dace, ana samar da haɗin gwiwar electron-hole. A ƙarƙashin haske, yawan mai ɗaukar kaya a cikin kayan ya wuce ƙimar daidaitonsa. Da zarar an cire tushen haske, yawan mai ɗaukar kaya zai lalace zuwa yanayin daidaitonsa a cikin wani tsari da aka fi sani da sake haɗawa. Ga wasu hanyoyi daban-daban na sake haɗawa:
1. Haɗakar Radiative
Haɗakar haske ita ce juyewar tsarin shaye-shaye na haske, inda electron ke canzawa daga yanayin kuzari mai yawa zuwa yanayin kuzari mai ƙasa, yana fitar da ƙarin kuzarin a matsayin haske. Wannan nau'in haɗuwa yana da mahimmanci a cikin lasers na semiconductor da diodes masu fitar da haske (LEDs) amma ba shi da rinjaye a cikin ƙwayoyin hasken rana na silicon.
2. Haɗakar Auger
Haɗakar Auger ita ce hanyar da ta biyo baya ta ionization na tasirin. Lokacin da electron da rami suka sake haɗuwa, ana canja wurin makamashin da ya wuce kima zuwa wani electron maimakon a sake shi a matsayin haske. Sai electron ɗin da ke motsawa ya koma yanayinsa na asali, yana sakin phonon (ƙarfin girgiza). Haɗakar Auger yana bayyana musamman a cikin kayan da aka yi amfani da su sosai, musamman lokacin da yawan ƙazanta ya wuce 10¹⁷ cm⁻³, wanda hakan ya sa ya zama babban tsarin sake haɗawa a irin waɗannan yanayi.
3. Haɗawa da Tarko ta Taimakawa
Rashin datti da lahani a cikin semiconductors suna haifar da matakan makamashi da aka yarda a cikin bandage da aka haramta. Waɗannan matakan kuzarin lahani suna sauƙaƙa tsarin sake haɗa matakai biyu: electron yana fara hutawa daga band ɗin isar da sako zuwa matakin lahani sannan zuwa band ɗin valence, inda yake sake haɗuwa da rami. Wannan tsari yana da matuƙar tasiri wajen haɓaka sake haɗawa kuma yana iya yin tasiri sosai ga aikin ƙwayoyin hasken rana.
4. Haɗa saman
Ana iya ganin saman semiconductor a matsayin yanki mai yawan lahani saboda ƙarewar tsarin kristal. Waɗannan lahani na saman suna haifar da yanayi da yawa na kuzari a cikin bandgap da aka haramta, inda sake haɗawa zai iya faruwa cikin sauƙi. Sake haɗawa a saman abu muhimmin abu ne saboda tsarin kristal a saman ba shi da tsari sosai, wanda ke sa sake haɗawa ya fi yuwuwar faruwa a waɗannan yankuna.
Kammalawa
A cikin ƙwayoyin hasken rana masu amfani, waɗannan hanyoyin haɗakarwa suna ba da gudummawa ga asarar aiki gabaɗaya. Aikin masu ƙira ƙwayoyin halitta shine rage waɗannan asara don inganta inganci. Kowace tsarin haɗakarwa yana gabatar da ƙalubale daban-daban, kuma shawo kan waɗannan ta hanyar zaɓar kayan aiki, ƙin yarda da saman, da kuma matakan doping da aka inganta yana da mahimmanci don haɓaka aikin ƙwayoyin hasken rana. Bugu da ƙari, fasalulluka na ƙira daban-daban suna bambanta ƙwayoyin hasken rana daban-daban na kasuwanci a kasuwa, suna tasiri ga ingancinsu da yuwuwar amfani da su.
