CN201100964Y - Semiconductor plastic luminescent tube - Google Patents

Abstract

A semiconductor plastic luminescent tube relates to a luminescent tube which adopts laminated semiconductor plastic material. In the existing optoelectronic device and flat panel display field, most of electroluminescent devices are made of inorganic semiconductor materials, and the inorganic semiconductor materials have high luminous efficiency but have difficulty on the technique for manufacturing displays with large area. The semiconductor plastic luminescent tube is composed of a luminescent tube, wherein an acting layer of the luminescent tube contains plastic semiconductor copper phthalocyanine and a quinoline aluminum evaporated film acting layer, and the structure is gold 1, copper phthalocyanine 2, aluminum 3, the copper phthalocyanine 2, quinoline aluminum 4, an ITO transparent electrode 5 and a glass substrate 6. The product of the utility model is suitable for flexible whole plastic displays.

Description

Semiconductor plastic light-emitting tube

Technical field:

The utility model relates to a kind of luminous tube that adopts the flat-panel monitor of stacked semiconductor plastic material.

Background technology:

In existing opto-electronic device and the field of flat panel displays, electroluminescent device is made by inorganic semiconductor material mostly, the luminous efficiency height of inorganic semiconductor material, but make large-area display, also have any problem on the technology.

Summary of the invention:

The purpose of this utility model provides a kind of luminous tube that can be made into the employing stacked semiconductor plastic material of large-area flat-plate display.

Semiconductor plastic light-emitting tube, its composition comprises: luminous tube comprises plastic semiconductor CuPc and quinoline aluminum evaporating film in the active layer of described luminous tube.

Above-mentioned semiconductor plastic light-emitting tube, described active layer structure is gold, CuPc, aluminium, CuPc, quinoline aluminum, ito transparent electrode, glass substrate.

Above-mentioned purpose realizes by following technical scheme:

This technical scheme has following beneficial effect:

1. the plastics electroluminescent device is compared with the electroluminescent device of inorganic semiconductor material, its preparation technology is various informative, the cost of material is low, can make polychrome and full-color display spare, make large area display spare easily, have the incomparable characteristic of inorganic material, particularly the plastics luminescent device of the utility model employing, its driving voltage is low, can be complementary with integrated circuit.

2. plastics electroluminescent device of the present utility model is compared with the electroluminescent device of inorganic semiconductor material, flexible good, the display device that can be processed into difformity and even can curl, break the existing shape of display device, will be with a wide range of applications in information technology, information display technology field.

3. adopt the display of plastics light-emitting diode of the present utility model, simple structure, self-luminous does not need background light source, and contrast height, thin thickness, the visual angle is wide, response speed is fast, the serviceability temperature scope is wide, low cost of manufacture, low-power consumption.And traditional removable electronic product, display unit as mobile phone, notebook computer etc. all adopts liquid crystal display device, this display device be adopt noncrystalline or Weimer triode that polysilicon is made as driving element, its complex process, with high costs.The utility model has fundamentally overcome many shortcomings of LCD, volume that causes as brightness, visual angle, backlight and power consumption are big, complex manufacturing technology, large tracts of land cost costliness or the like, and the display with the utility model active layer is considered to replace the display device of future generation of LCD.

4。The present fet made of the plastic semiconductor that uses, because semi-conductive conductance is low, carrier mobility is little, causes that its operating characteristics such as switching speed are low, driving voltage is high and is difficult to practicability.The semiconductor aluminium film gate electrode plastic semiconductor phthalocyanine copper film triode of vertical shape structure of the present utility model, because covering the surface of the semiconductive aluminium film on the phthalocyanine copper film surface that is the hills and mountains state is little sharp type electrode shape, make that Schottky internal electric field pediment portion is the strongest, produce little sharp electrode effect, the image charge layer that semiconductor electrit film one side produces, the actual effect schottky barrier height at the interface of the CuPc of drain region and aluminium is reduced, charge carrier by source emitter, the two Schottky barrier gate regions territories of tunnelling CuPc/aluminium/CuPc, form the operating current of VOTFT, but its operating characteristics has at a high speed, powerful characteristic, the utility model is exactly the active driven for emitting lights tube device that this technology and OLED technology are composited, operating current by the VOTFT of semiconductor electrit film drives and control, the luminous intensity of OLED, realize the meticulous control of its luminous intensity, have and only use plastic semiconductor material and metal electrode, adopt vacuum vapor deposition method promptly to can be made into the advantage of active driving plastic semiconductor luminescent device.

5. product of the present utility model is the centre that the semiconductor aluminium gate is embedded in the hole-transporting layer phthalocyanine copper film, this vertical shape structure of many potential barriers that comprises conductivity gate and heterojunction diode, be similar to the structure of inorganic semiconductor thyratron, actuating speed is fast, and current density is big.

6. accompanying drawing 4 has shown dynamic characteristic test result of the present utility model, and incoming frequency is the ac square wave signal of 1000Hz, measures its AC response electric current I _DSObtain, know output response current I by measurement result _DSAmplitude and its static characteristic V _DS=3V is a data consistent, by the switching characteristic parameter that the dynamic characteristic measurement result obtains, T _ON=0.26ms, T _OFF=0.21ms has shown its high speed motion characteristic, compares with it, this product that uses the CuPc plastic semiconductor to make, its cut-off frequency is less than 100Hz, and driving voltage is 30-100V, though the carrier mobility of the CuPc evaporating film that the switching speed of triode is had a significant impact is 10 ^-6Cm ²/ Vs, but the plastic film triode of longitudinal type VOTFT structure adopted, compare with the OFET of transversary, because conducting channel significantly shortens, make operating characteristicss such as its driving voltage and switching speed obtain very big improvement.

7. by the basic electric test structure of OSET as can be known, the OSET of the utility model development has following characteristics, and 1. gate drive voltage is low, and easy and inorganic integrated circuit is complementary; 2. high speed motion, be inferior Millisecond switching time, can satisfy high speed image and refresh requirement; 3. be the luminescent device of active driving; 4. this product adopts stepped construction, and is easy to make, helps integrated.

8. the utility model provides the overall plastic luminous tube of semiconductive grid VOTFT and OLED laminated construction, this product has the characteristic of compact conformation, compatible OLED technology, high-speed driving, test result by static characteristic and dynamic characteristic, the triode of having confirmed this structure has active driving, is easy to the advantage that inorganic IC is complementary, further improvement by double conductive aluminum grid structure, select the plastic semiconductor material of high carrier mobility for use, the operating characteristics of this device can also further be improved.

Description of drawings:

Accompanying drawing 1 is the layer structure schematic diagram that active driven for emitting lights tube device that this VOTFT and OLED technology are composited is OSTE.

Accompanying drawing 2 is AEM images of the little sharp aluminium gate of representative semiconductive.

Accompanying drawing 3 is static characteristic figure of this product.

The dynamic characteristic figure of this product during accompanying drawing 4.

Accompanying drawing 5 is luminous schematic diagrames of this product.

Embodiment of the present utility model:

Embodiment 1:

Semiconductor plastic light-emitting tube, its composition comprises: luminous tube comprises plastic semiconductor CuPc and quinoline aluminum evaporating film in the active layer of described luminous tube.

Described active layer structure is gold 1, CuPc 2, aluminium 3, CuPc 2, quinoline aluminum 4, ito transparent electrode 5, glass substrate 6.

The VOTFT of the vertical structure that this product adopts is different with the fet of transversary, semiconductor aluminum evaporation film grid is to be embedded between the two-layer CuPc, become gold evaporation film that ohmic properties contacts as source electrode and drain electrode with CuPc, the drive part VOTFT of OSET adopts vacuum vapor deposition method to make, with ground floor thickness is that the CuPc evaporation of 100nm is produced on the transparent electrode glass sheet of ITO, making film thickness on the film of CuPc is the semiconductor aluminium gate of 20nm, the thickness of the second layer phthalocyanine copper film that evaporation is made on grid is about 80nm, makes the gold evaporation membrane electrode at last.

During making, substrate temperature is a room temperature, and the evaporation rate of CuPc is 2nm/min, and vacuum degree is 10 ^-5Torr.

The action mechanism of the utility model product is the height that changes CuPc/aluminium/CuPc Schottky barrier by grid bias, control is injected into the quantity in luminescent layer Aiq3 hole, it is luminous to reach driving Aiq3, and control the purpose of its luminous intensity, the OSET of this vertical structure, be applicable to that actuating speed is fast, the display device that current density is big is so be called plastic solidification class vacuum three utmost point luminous tubes or plastic solidification class vacuum three utmost point luminous tubes because the unsaturated current characteristics of this plastic light-emitting tube is similar to vacuum triode.

Interfacial structure to the CuPc/aluminium gate of product can observation analysis by atomic force microscope.The static characteristic of VOTFT and dynamic characteristic with pA ammeter/direct voltage source, exchange function signal generator, memory for digits oscilloscope etc. is measured.All mensuration is all at room temperature carried out, and in order to prevent the photoelectricity influential effect of Schottky barrier, sample is placed in the sealed metal container, makes grid bias V _GSBe increased to 2V from 0V, stride is 0.2V.Bias voltage V between source-drain electrode _DSBe increased to 3V from 0V.After measured, as source-drain electrode bias voltage V _GSConstant, the operating current I of plastics VOTFT _DSWith grid bias V _GSIncrease and reduce, and operating current I _DSWith bias voltage V between source-drain electrode _DSIncrease and increase, and be unsaturated tendency.This be since VOTFT the source---gate pitch is from very short, so the resistance of its conduction can not produce degenerative effect, and the current-voltage correlation of fet is saturation characteristic, be because the resistance of its conduction produces negative feedback effect, its operating current is elevated to behind the saturation region no longer with V _DSIncrease and increase.

VOTFT and plastics electroluminescent device that centering has the high speed motion characteristic pass through appropriate design, and control CuPc evaporating film thickness and semiconductive aluminium gate size are made plastic light-emitting tube.At first the evaporation of the plastics luminescent material quinoline aluminum of the about 50mm of thickness is produced on the ito transparent electrode on the glass substrate, also can with CuPc evaporation simultaneously, make above-mentioned VOTFT part then, Fig. 5 is the luminous schematic diagram of plastic light-emitting tube.

Claims (2)

1. semiconductor plastic light-emitting tube, its composition comprises: luminous tube is characterized in that: comprise plastic semiconductor CuPc and quinoline aluminum evaporating film in the active layer of described luminous tube.

2. semiconductor plastic light-emitting tube according to claim 1 is characterized in that: described active layer structure is gold, CuPc, aluminium, CuPc, quinoline aluminum, ito transparent electrode, glass substrate.

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