Nnyocha ọhụrụ nke otu Mahadum Wuhan: arụmọrụ Mini LED uhie mụbara site na 30%

N'oge na-adịbeghị anya, ndị otu Zhou Shengjun na Mahadum Wuhan mepụtara ihe mkpuchi ọhụrụ nke Schottky-contact intrinsic current blocking layer (SCBL), nke nwere ike ime ka mgbasa ọkụ dị ugbu a na mpaghara na-arụ ọrụ ka mma. Ma melite arụmọrụ mwepụta ọkụ nke AlGaInP red Obere LED(Lee).

Ihe osise dị n'elu na-egosi (a) nhazi ngwaọrụ ahụ, na (b) usoro mmepụta dabere na nhazi ọkụ uhie nke AlGaInP kwụ ọtọ Obere Led na SCBL. (c) SCBL na (d) Ọdịdị ọkụ uhie nke AlGaInP nke kwụ ọtọ Obere ihe ngosi anya LED n'elumikroskopuonyonyo.

Onye ndu nyocha Shengjun Zhou kwuru na ndị otu ahụ jiri njirimara kọntaktị Schottky dị n'etiti indium tin oxide (ITO) na p-GaP, yana njirimara kọntaktị ohmic dị n'etiti ITO na p-GaP+ iji wuo SCBL, nke usoro ogologo mbufe gosipụtara.

Zhou Shengjun kwuru na SCBL nwere ike ibelata oke mkpọtụ dị ugbu a gburugburu electrode p ma kwalite mgbasa ọkụ otu, si otú a na-eme ka arụmọrụ mwepụ ọkụ nke AlGaInP red Mini LED dịkwuo mma. N'ihi mmụba nke mgbasa ọkụ ugbu a na mwepụ ọkụ, obere led nwere SCBL na-egosi nkesa nha anya nke ike ọkụ, ike mmepụta anya dị elu, na arụmọrụ quantum mpụga dị elu (EQE).

A na-ejikarị AlGaInP red Mini LED eme ihe dị ka akụkụ dị mkpa nke agba zuru oke. ngosipụta n'ihi nnukwu ìhè ya, obere oriri ike na ogologo ndụ ọrụ ya.

Agbanyeghị, oke ọkụ eletrik gburugburu electrode p na-ebute nkesa ọkụ eletrik na-adịghị mma na mpaghara ahụ na-arụ ọrụ. Na mgbakwunye, n'ihi na ọtụtụ foton ndị a na-emepụta na mpaghara ahụ na-amịkọrọ ma ọ bụ na-egosipụta site na electrode p metal na-adịghị ahụkebe, arụmọrụ mwepụta ọkụ (LEE) nke Mini LED dabere na AlgainP dị ala.

Iji dozie nsogbu a, ndị nchọpụta webatara SCBL iji melite mgbasa ugbu a na mwepụta ìhè nke obere led nke dabeere na AlgainP. Site na iji kọntaktị Schottky n'etiti ITO na P-gap, SCBL nwere ike igbochi mgbasa nke ugbu a gburugburu electrode p. A na-amanye ugbu a ịbanye na mpaghara na-arụ ọrụ site na oyi akwa kọntaktị P-GAP + ohmic iji zere nnabata na ntụgharị nke ìhè site na electrode p metal na-adịghị ahụkebe.

Nsonaazụ gosiri na arụmọrụ quantum mpụga (EQE) nke Mini LED dabere na AlGaInP site na iji SCBL nwere ike ịbawanye ruo 31.8% na ọkụ eletrik nke 20mA ma e jiri ya tụnyere Mini LED dabere na AlGaInP na-enweghị SCBL. Ya mere, a na-atụ anya na a ga-etinye teknụzụ SCBL n'ọrụ mmepụta nke Mini LED uhie dabere na AlgainP n'ọdịnihu.

Ọ dị mkpa ịmara na ndị otu Zhou Shengjun nke Mahadum Wuhan ewepụtakwala ọtụtụ nsonaazụ ọhụrụ nke nyocha LED. Dịka ọmụmaatụ, n'ọhịa nke ọkụ ultraviolet miri emi, ndị otu ahụ webatara njikọ ọwara dị warara nke dabeere na Algan (26 nm) na ọkụ ultraviolet miri emi, nke mere ka arụmọrụ ntụgharị electro-optical nke ọkụ ultraviolet miri emi dịkwuo elu site na 5.5%.

N'ọhịa nke Mini LED, ndị otu ahụ mere ka arụmọrụ nke chips LED acha anụnụ anụnụ na akwụkwọ ndụ akwụkwọ ndụ dịkwuo mma site na iji Full-angle Distributed Bragg Reflector (DBR). N'ọnọdụ nke 10mA injection current, ike mmepụta anya nke acha anụnụ anụnụ na akwụkwọ ndụ akwụkwọ ndụ Mini LED dabere na ITO/DBR na-abawanye site na ihe dị ka 7.7% na 7.3%, n'otu n'otu.