Lokacin da LED ke aiki, yanayi masu zuwa na iya sa yanayin junction ya tashi zuwa digiri daban-daban.

1. An tabbatar da cewa iyakancewar ingantaccen aiki shine babban dalilin hawan hawan.LED junctionzafin jiki.A halin yanzu, haɓakar kayan haɓakawa da hanyoyin samar da kayan aiki na iya canza yawancin ƙarfin shigar da wutar lantarki naLED zuwa haskemakamashin radiation.Duk da haka, saboda LED guntu kayan da yawa girma refractive coefficients fiye da kewaye kafofin watsa labarai, wani babban ɓangare na photons (> 90%) generated a cikin guntu ba zai iya smoothly ambaliya da ke dubawa, da kuma jimlar tunani ne generated tsakanin guntu da kafofin watsa labarai dubawa, Yana ya koma ciki na guntu kuma a ƙarshe abin guntu ko substrate ya shafe shi ta hanyar tunani na ciki da yawa, kuma ya zama zafi a cikin nau'i na girgizar lattice, yana inganta yanayin junction don tashi.

2. Tunda mahadar PN ba za ta iya zama cikakke sosai ba, aikin allurar na sinadarin ba zai kai 100% ba, wato ban da cajin (rami) da aka yi wa yankin N a yankin P, yankin N kuma zai yi allurar. cajin (electron) a cikin yankin P lokacin da LED ke aiki.Gabaɗaya, nau'in cajin na ƙarshe ba zai haifar da tasirin optoelectric ba, amma za a cinye shi ta hanyar dumama.Ko da ɓangaren amfani na cajin allurar bai zama haske ba, wasu za su zama zafi idan an haɗa su da ƙazanta ko lahani a cikin mahaɗin.

3, The bad electrode tsarin na kashi, da kayan da taga Layer substrate ko junction yankin, da conductive azurfa manne duk da wasu juriya dabi'u.Wadannan juriya suna stacked da juna don samar da jerin juriya naLED kashi.Lokacin da halin yanzu ke gudana ta hanyar haɗin PN, zai kuma gudana ta hanyar waɗannan resistors, wanda zai haifar da zafi na Joule, wanda zai haifar da hawan zafin jiki na guntu ko junction zafin jiki.