AlGaN multiple quantum well deep-ultraviolet micro-light-emitting diodes for high color conversion efficiency quantum dots display

Feng, Feng1; Liu, Yibo1; Zhang, Ke1; Lin, Yonghong2; Chan, Ka-Wah1,3; Kwok, Hoi-Sing1; Liu, Zhaojun1,2,3

2022-02-01

10.1002/jsid.1107

Journal of the Society for Information Display   影响因子和分区

1071-0922

1938-3657

Displays based on inorganic micro-light-emitting diodes (micro-LEDs) are highly anticipated for next-generation technologies. AlGaN-based deep-ultraviolet (deep-UV) micro-LED as the excitation source for quantum dots display with high efficiency was reported in this paper. To achieve optimized electro-optical performance, deep-UV micro-LEDs with different electrodes were fabricated and analyzed in sizes from 200 x 200 to 10 x 10 mu m(2). At the same forward bias, the devices with Ti/Al-based electrodes achieved 10 times injection current and three times electroluminescence intensity than those with Cr/Al-based electrodes. The blueshift phenomenon of deep-UV light was observed from 292 nm at 2 A/cm(2) to 287 nm at 200 A/cm(2) with the increasing current density. By the excitation of deep-UV micro-LED, quantum dot film achieved high light conversion efficiency and optimized color rendering, as the converted color emission peak was separate from the pumping source. The high energy of deep-UV photons and the narrow emission bandwidth of QDs resulted in prominent color purity. The forward voltage and electroluminescence intensity uniformity of a 250 x 250 micro-LED array with each pixel size of 30 x 30 mu m(2) were further discussed. The optical microscope images of green QD film pumped by a deep-UV micro-LED demonstrated its competitive application in the color-converted display.

AlGaN color conversion deep-UV display micro-LED quantum dots

SCI ; EI

英语

通讯

State Key Laboratory of Advanced Displays and Optoelectronics[VPRGO13EG02] ; Highlevel University Fund[G02236005] ; Shenzhen Technology Research Project[JSGG20180508152033073] ; Shenzhen Science and Technology Program[KQTD20170810110313773] ; Guangdong Science and Technology funding[2017B010114002] ; KeyArea Research and Development Program of Guangdong Province[2019B010925001]

Engineering ; Materials Science ; Optics ; Physics

Engineering, Electrical & Electronic ; Materials Science, Multidisciplinary ; Optics ; Physics, Applied

WOS:000754462500001

WILEY

20220811672445

Aluminum alloys ; Aluminum gallium nitride ; Color ; Conversion efficiency ; Electrodes ; Electroluminescence ; Gallium alloys ; III-V semiconductors ; Indium alloys ; Light ; Organic light emitting diodes (OLED) ; Quantum efficiency ; Semiconductor alloys ; Semiconductor quantum dots ; Semiconductor quantum wells

Energy Conversion Issues:525.5 ; Aluminum Alloys:541.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Electricity: Basic Concepts and Phenomena:701.1 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light, Optics and Optical Devices:741 ; Light/Optics:741.1 ; Nanotechnology:761 ; Inorganic Compounds:804.2 ; Quantum Theory; Quantum Mechanics:931.4 ; Crystalline Solids:933.1

Web of Science

1.Hong Kong Univ Sci & Technol, State Key Lab Adv Displays & Optoelect Technol, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen, Peoples R China
3.Shenzhen Sitan Technol Co Ltd, Shenzhen, Peoples R China

Feng, Feng,Liu, Yibo,Zhang, Ke,et al. AlGaN multiple quantum well deep-ultraviolet micro-light-emitting diodes for high color conversion efficiency quantum dots display[J]. Journal of the Society for Information Display,2022,30:556-566.

Feng, Feng.,Liu, Yibo.,Zhang, Ke.,Lin, Yonghong.,Chan, Ka-Wah.,...&Liu, Zhaojun.(2022).AlGaN multiple quantum well deep-ultraviolet micro-light-emitting diodes for high color conversion efficiency quantum dots display.Journal of the Society for Information Display,30,556-566.

Feng, Feng,et al."AlGaN multiple quantum well deep-ultraviolet micro-light-emitting diodes for high color conversion efficiency quantum dots display".Journal of the Society for Information Display 30(2022):556-566.