Lilemong tsa bo-1960, basebetsi ba saense le thekenoloji ba ile ba qapa li-diode tse hlahisang khanya ea LED ba sebelisa molao-motheo oa semiconductor PN junction light-emitting.LED e hlahisitsoeng ka nako eo e ne e entsoe ka GaASP, 'me' mala oa eona o le khubelu.Ka mor'a lilemo tse ka bang 30 tsa tsoelo-pele, LED e tsebahalang e ka ntša mebala e khubelu, ea lamunu, e mosehla, e tala, e putsoa le e meng.Leha ho le joalo, li-LED tse tšoeu bakeng sa mabone li ile tsa ntlafatsoa feela ka mor'a 2000. Mona, babali ba tsebisoa ka li-LED tse tšoeu bakeng sa ho khantša.

ntshetsa pele

Mohloli oa pele oa leseli la LED o entsoeng ka semiconductor PN junction light-emitting molao-motheo o hlahile mathoasong a lilemo tsa bo-1960.Thepa e neng e sebelisoa ka nako eo ke GaAsP, e ntšang khanya e khubelu (λp=650nm).Ha motlakase oa koloi e le 20 mA, khanya e khanyang ke likete tse 'maloa feela tsa lumens,' me matla a khanyang a tšoanang a ka bang 0.1 lumen/watt.

Bohareng ba lilemo tsa bo-1970, likarolo tsa In le N li ile tsa hlahisoa ho etsa hore li-LED li hlahise leseli le letala (λp=555nm), leseli le mosehla (λp=590nm) le lebone la lamunu (λp=610nm), 'me matla a khanyang a boetse a eketsoa ho 1. lumen/watt.

Mathoasong a lilemo tsa bo-1980, mehloli ea leseli la LED ea GaAlAs e ile ea hlaha, e etsa hore matla a khanyang a li-LED tse khubelu a fihle ho 10 lumens / watt.

Mathoasong a lilemo tsa bo-1990, lisebelisoa tse peli tse ncha, GaAlInP, e hlahisang leseli le khubelu le le mosehla, le GaInN, e hlahisang leseli le letala le le leputsoa, ​​​​li ile tsa ntlafatsoa ka katleho, tse ileng tsa ntlafatsa haholo matla a khanyang a LED.

Ka 2000, ts'ebetso e khanyang ea li-LED tse entsoeng ke tsa pele li fihlile ho lumens tse 100 ka watt libakeng tse khubelu le tsa lamunu (λp = 615nm), ha ts'ebetso e khanyang ea li-LED tse entsoeng ke tsa morao-rao sebakeng se setala (λp = 530nm) e ka fihla ho 50 lumens./watt.