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A kind of LED device with integrated graphene temperature sensor and its manufacturing method

A temperature sensor, LED device technology, applied in the direction of semiconductor devices, electrical solid state devices, semiconductor/solid state device testing/measurement, etc. The effect of light output rate, reduction of light absorption, and stable working performance

Active Publication Date: 2018-10-09
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under normal driving current, LED will produce self-heating effect, which will affect the temperature measurement accuracy; under low current driving, due to the rapid decrease of junction temperature during the transition process of LED working state and test state, this will also affect temperature measurement the accuracy of

Method used

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  • A kind of LED device with integrated graphene temperature sensor and its manufacturing method

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with drawings and embodiments.

[0035] see figure 1 , which is a schematic structural view of the LED device integrated with graphene temperature sensing in the present invention. The chip of the device includes an LED light emitting device 100 and a temperature sensing device 200 . The temperature sensing device 200 is a graphene device. The LED light emitting device 100 and the temperature sensing device 200 adopt a back-to-back up and down stacking structure, and are electrically independent from each other. The LED light emitting device 100 with a front-mounted chip structure is on the top, and the temperature sensing device 200 is on the bottom. The lower surface of the temperature sensing device 200 is fixed on the heat dissipation substrate 301 and its electrodes are electrically connected to the wiring on the substrate.

[0036] The structure of the temperature sensing device 200 includes a...

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Abstract

The invention discloses an LED device integrating graphene temperature sensing and a manufacturing method thereof. A chip of the device includes an LED luminescent device and a temperature sensing device. The temperature sensing device is a grapheme device. The LED luminescent device and the temperature sensing device are in a back-to-back stacked structure. The LED luminescent device is in the upper position, and the temperature sensing device is in the lower position. The junction temperature of the LED luminescent device can be monitored by means of measuring changes of a graphene thin-film resistor in the temperature sensing device with temperature changes. The LED device integrating graphene temperature sensing of the invention can accurately and stably reflects the junction temperature of the LED device in real time, and can effectively raise the light extracting rate of the LED luminescent device and heat radiation of the whole device.

Description

technical field [0001] The invention relates to a light-emitting device and a manufacturing method, in particular to an LED light-emitting device with integrated graphene temperature sensing and a manufacturing method thereof. Background technique [0002] Light-emitting diode (light-emitting-diode, LED) is a new generation of solid-state lighting cold light source, which has high energy efficiency, long life, low voltage, simple structure, small size, light weight, fast response, good shock resistance and full color spectrum. Features, making it widely used in various occasions such as backlights, displays, traffic lights and indoor lighting. Especially in general lighting, LED has obvious advantages over traditional light sources and will become the next generation of lighting sources. [0003] With the continuous popularization of LED applications, the reliability of LEDs has been an important factor restricting its development, especially the junction temperature measur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/66H01L25/00H01L33/60H01L33/64
CPCH01L2224/16225H01L2224/48091H01L2224/48227H01L2224/49107H01L2224/73257H01L2924/00014
Inventor 周玉刚李家明张荣
Owner NANJING UNIV
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