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Light-emitting diode and modulation method for luminous efficiency and intensity of light-emitting diode

A technology of light-emitting diodes and luminous efficiency, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of low quantum efficiency and light extraction efficiency, and achieve the effects of increasing internal quantum efficiency, reducing light extraction loss, and increasing light extraction efficiency

Active Publication Date: 2014-03-26
BEIJING INST OF NANOENERGY & NANOSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for modulating the luminous efficiency and intensity of light-emitting diodes to overcome the problems of low internal quantum efficiency and light extraction efficiency of light-emitting diodes in the prior art

Method used

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  • Light-emitting diode and modulation method for luminous efficiency and intensity of light-emitting diode
  • Light-emitting diode and modulation method for luminous efficiency and intensity of light-emitting diode

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Embodiment 1

[0046] In the modulation method of light-emitting diode luminous efficiency and intensity in this embodiment, the light-emitting diode is composed of a semiconductor thin film and piezoelectric micro-nano wires on the semiconductor thin film, see figure 2 , the semiconductor film 130 and the conductive glass 100 are arranged on the substrate 120 apart, the thickness of the conductive glass 100 is basically the same as that of the semiconductor film 120, a groove is formed on the semiconductor film 130 and the conductive glass 100, and the piezoelectric micro-nano wire 160 is parallel to the semiconductor film and Across the groove, that is, one end of the piezoelectric micro-nano wire 160 is fixed on the semiconductor film 130 , and the other end is fixed on the conductive glass 100 , and the piezoelectric micro-nano wire 160 and the semiconductor film 110 form a light emitting diode. The electrode 150 at one end of the piezoelectric micro-nano wire 160 fixed on the conductive...

Embodiment 2

[0052] In the modulation method of light-emitting diode luminous efficiency and intensity in this embodiment, the light-emitting diode is composed of semiconductor thin film and piezoelectric micro-nano wire, see Figure 3a , prepare two metal or transparent conductive films 230 on the plastic material substrate 200, and form a groove between the two metal or transparent conductive films 230, and place semiconductor piezoelectric micro-nano wires 210 with piezoelectric properties on the substrate On the bottom, the piezoelectric micro-nanowire 210 is parallel to the metal or transparent conductive film 230 and straddles the trench, that is, the two ends of the piezoelectric micro-nanowire 230 are respectively fixed on the metal or transparent conductive film 230, and the semiconductor A polymer semiconductor or an inorganic semiconductor film 220 and a semiconductor micro-nano wire 210 are arranged on the piezoelectric micro-nano wire 210 to form a PN junction, and an anode ele...

Embodiment 3

[0058] In the modulation method of light-emitting diode luminous efficiency and intensity in this embodiment, the light-emitting diode is composed of a semiconductor thin film and piezoelectric micro-nano wires on the semiconductor thin film, see Figure 4 , the semiconductor film 310 is located on the substrate 300, the piezoelectric micro-nano wire 320 is substantially perpendicular to the semiconductor film 310, the piezoelectric micro-nano wire 320 and the semiconductor film 310 form a light-emitting diode, the semiconductor film 310 includes a bottom electrode 330, and the piezoelectric micro-nano wire 320 forms a light emitting diode. The nanowire 320 includes a top electrode 340 thereon. A power supply is connected between the bottom electrode 330 and the top electrode 340 of the light-emitting diode to drive the light-emitting diode to emit light; the stress F1 along the micro-nano wire 320 is applied to the top of the piezoelectric micro-nano wire 320, so that the micr...

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Abstract

The invention provides a modulation method for luminous efficiency and intensity of a light-emitting diode. Through applying a stress to a light-emitting diode, a material of an N region and / or a P region of which are / is piezoelectric, the light-emitting diode is made deform and a piezoelectric field caused by the deformation modulates the luminous efficiency and intensity of the light-emitting diode. Correspondingly, the invention also provides the light-emitting diode. In the modulation method for the luminous efficiency and intensity of the light-emitting diode, through introducing an appropriate stress to the PN-junction light-emitting diode, the energy band of the light-emitting diode is adjusted so that current used for electro-optical conversion in the light-emitting diode is increased and at the same time band-energy bending is introduced near the PN junction. Electrons and cavity potential wells formed through the bending can attract and restrict carriers near the PN junction and increase and constraint of local electrons and cavity concentration make the electron and cavity composite efficiency increase so that internal quantum efficiency of the light-emitting diode is increased.

Description

technical field [0001] The invention relates to the field of semiconductor devices, in particular to a light-emitting diode and a method for modulating the luminous efficiency and intensity of the light-emitting diode. Background technique [0002] Semiconductor light-emitting diodes are widely used in chemical, biological, medical and military fields. Internal light quantum efficiency and light extraction efficiency are two important factors affecting the efficiency of light-emitting diodes. The internal quantum efficiency of light-emitting diodes reflects the efficiency of converting injected electrons into photons. The light extraction efficiency reflects the efficiency with which luminescent photons are emitted from the LED. The external quantum efficiency is the ratio of the actually emitted photons to the injected electrons, which is jointly determined by the internal quantum efficiency and the light extraction efficiency. The luminous intensity of a light-emitting d...

Claims

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Application Information

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IPC IPC(8): H01L33/00H01L33/02
CPCH01L33/02
Inventor 王中林杨青
Owner BEIJING INST OF NANOENERGY & NANOSYST
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