Near-infrared flexible detector based on optical microcavity effect and preparation method thereof

An optical microcavity and near-infrared technology, applied in the field of photoelectric detection, can solve the problems of large half-wave peak width, poor detection performance and no dynamic detection capability, and achieve the effect of small composite loss and improved detection performance.

Inactive Publication Date: 2020-08-04
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a near-infrared fl

Method used

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  • Near-infrared flexible detector based on optical microcavity effect and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] A near-infrared flexible detector based on the optical microcavity effect, including a glass substrate 1, a flexible substrate 2 is attached to the glass substrate 1, a transparent conductive electrode ITO3 is plated on the flexible substrate 2, and the transparent conductive electrode ITO3 An electron transport layer 4 , an organic functional layer 5 , and a hole transport layer 6 are spin-coated sequentially from bottom to top, and a metal electrode layer 7 is plated on the hole transport layer 6 .

[0039] Wherein, the flexible substrate 2 is PET.

[0040] The translucent conductive electrode ITO3 is an Au conductive electrode with a thickness of 30 nm.

[0041] The electron transport layer 4 adopts PEIE with a thickness of 10 nm.

[0042] The organic functional layer 5 adopts a PBTTT:PCBM bulk heterojunction with a thickness of 150 nm.

[0043] The hole transport layer 6 adopts MnO with a thickness of 10nm 3 film.

[0044] The metal electrode layer 7 is a silver...

Embodiment 2

[0054] On the basis of Embodiment 1, the difference between this embodiment and Embodiment 1 is that the organic functional layer 5 is replaced by P3HT:PCBM.

[0055] Before the test, the flexible substrate 2PET and the film on it are removed from the glass substrate 1 to obtain a bendable flexible detector. Under standard test conditions, the light beam is extracted from the light source, and the incident light 8 is vertically incident on the flexible flexible detector. The test result shows that when the flexible substrate 2 is properly bent, the radius of curvature is 14 cm, and the organic functional layer 5 is about 130 nm. The test results show that the perovskite photodetector has a near-infrared narrow-band detection capability at 780nm, and its detection rate is 8.2-10 12 Jones, the half-wave peak width is 26nm.

Embodiment 3

[0057] On the basis of Embodiment 1, the difference between this embodiment and Embodiment 1 is that the bendable flexible substrate 2PET is replaced by a stretchable flexible substrate 2VHB.

[0058] Before the test, the flexible substrate 2VHB and the film on it are removed from the glass substrate 1 to obtain a stretchable flexible detector. Under standard test conditions, the light beam is drawn from the light source, and the incident light 8 is vertically incident on the flexible flexible detector. The test result shows that when the flexible substrate 2 is properly stretched, the organic functional layer 5 is about 135 nm, and the test result is that it can The curved flexible detector has near-infrared narrow-band detection capability at 780nm, and its detection rate is 8.2-10 12 Jones, the half-wave peak width is 31nm.

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Abstract

The invention relates to the technical field of photoelectric detection, in particular to a near-infrared flexible detector based on an optical microcavity effect and a preparation method of the near-infrared flexible detector. The invention discloses the near-infrared flexible detector based on an optical microcavity effect. The detector comprises a glass substrate, a flexible substrate is attached to the glass substrate, a transparent conductive electrode ITO is plated on the flexible substrate, the transparent conductive electrode ITO is sequentially coated with an electron transport layer,an organic functional layer and a hole transport layer from bottom to top in a spinning manner, a metal electrode layer is plated on the hole transport layer, and the flexible substrate comprises a plastic substrate, a stainless steel substrate, an ultrathin glass substrate, a paper substrate and a biological composite film substrate. According to the near-infrared flexible detector, the problemof large half-wave peak width of an organic photoelectric detector is solved, and the problems of poor detection performance and no dynamic detection capability in a near-infrared band are also solved.

Description

technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to a near-infrared flexible detector based on an optical microcavity effect and a preparation method thereof. Background technique [0002] Due to the characteristics of flexibility and easy integration, organic photodetectors have a wide range of applications in many consumer electronics products, health care, resource detection, and environmental protection. In order to meet the requirements of practical applications, organic photodetectors should have high detectivity and narrow spectral response range to achieve more accurate detection. And because the excitons in the long-wavelength band are difficult to separate, the external quantum efficiency of the device in the near-infrared band is low, which leads to low detection rate. Therefore, how to improve the detection ability and dynamic detection ability in the near-infrared band while achieving more accurate de...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCH10K85/30H10K77/111H10K30/15H10K30/87Y02E10/549
Inventor 张磊宛晨黄江贾晓伟
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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