III-nitride semiconductor/quantum dot hybrid white light LED device and preparing method thereof

A technology of nitride semiconductors and LED devices, which is applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of low conversion efficiency and long-term decay of yellow fluorescent pink, and achieve the effect of overcoming rough surfaces and improving luminous efficiency
CN104868023AActive Publication Date: 2015-08-26NANJING UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NANJING UNIV
Publication Date
2015-08-26

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Abstract

The invention discloses an III-nitride semiconductor / quantum dot hybrid white light LED device. According to the invention, an ordered nano-pore array is arranged outside the regions of a p type electrode and an n type electrode. The nano-pore array penetrates from the surface of the device through a quantum well active layer to the inner part of an n type nitride layer. The nano-pore array is internally filled with II-VI quantum dots. The invention further discloses a preparing method of the III-nitride semiconductor / quantum dot hybrid white light LED device. Non-radiative composite energy transferring between an indium gallium nitrogen (InGaN) quantum well and excitons in the II-VI quantum dots is utilized by the device to improved the light emitting efficiency of the device; in addition, by changing the types and the ratio of the filling quantum dots, the wavelength and the intensity of emitted light is adjusted, and the white light LED device with the nitride / quantum dot hybrid structure is capable of realizing a superhigh color rendering index.
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Description

technical field

[0001] The invention relates to a group III nitride semiconductor / quantum dot mixed white light LED device and a preparation method thereof, belonging to the field of semiconductor lighting. Background technique

[0002] Group III nitride materials are direct bandgap semiconductors, and their bandgap covers from infrared to visible light to ultraviolet bands. They are ideal materials for solid-state lighting and low-power displays. Solid-state lighting is a brand-new lighting field. It mainly uses semiconductor chips as light sources to directly convert electrical energy into light energy with high conversion efficiency. As the core component of solid-state lighting semiconductor light source, LED has low energy consumption, long life, small size, green environmental protection, safe use, and can work in various harsh environments. It is a new generation of lighting source after incandescent lamps and fluorescent lamps. With the continuous development of lig...

Claims

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