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Micromolecule organic light detector and preparation method thereof

A photodetector and small molecule technology, applied in organic chemistry, semiconductor/solid-state device manufacturing, electrical solid-state devices, etc., can solve the problems of vacuum evaporation processing, modification limitation, process incompatibility, etc., to prevent high temperature Risk of decomposition or denaturation, remarkable effect of photoelectric response, effect of reducing energy consumption and danger

Pending Publication Date: 2022-07-29
GUANGZHOU GUANGDA INNOVATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the modifiability of porphyrin, phthalocyanine, and porphyrazine molecules is limited by the vacuum evaporation process.
This is because: on the one hand, due to the large molecular weight of the porphyrin / phthalocyanine / porphyrazine derivative skeleton, the molecular weight will be further increased after modification, and the coordinated metal will be added; on the other hand, due to the porphyrin / phthalocyanine The framework of cyanine / porphyrazine derivatives has strong planarity and rigidity, and has strong intermolecular interactions, coupled with the interaction between coordination metals, resulting in a substantial increase in its sublimation temperature, which may eventually be impossible to use in vacuum evaporation. Separation and purification of plating processing, even vacuum evaporation processing is not possible
[0005] For example, in order to broaden the absorption wavelength to infrared, S.R.Forrest et al. developed a series of banded porphyrin molecules, which are composed of two zinc porphyrin molecules and rings. The molecular weight exceeds 1000g / mol, but it can only be processed by solution. The photodetection device is prepared by the method (Adv. Mater. 2010, 22, 2780-2783), which is not compatible with the current OLED production line process

Method used

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  • Micromolecule organic light detector and preparation method thereof
  • Micromolecule organic light detector and preparation method thereof
  • Micromolecule organic light detector and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0075] A small molecule photodetector, the structure from bottom to top is: ITO(100nm) / MoO 3 (8nm) / cuprous iodide (2nm) / 2,3-naphthaldehyde anthocyanin: lead bis(2,2,6,6,-tetramethyl-3,5-heptanedionate) (1.2: Composite film of 1, n / n, 40 nm) / C60 (40 nm) / LiF (1 nm) / Al (100 nm).

[0076] The preparation method of the above-mentioned small molecule photodetector is as follows:

[0077] S1. Place the ITO glass substrate on the developing rack, use an ultrasonic to ultrasonically clean it, and use the washing liquid in the order of acetone, isopropanol, detergent, deionized water and isopropanol, and then dry it in a vacuum oven ;

[0078] S2. The ITO is placed in an oxygen plasma generator, and an oxygen plasma (O 2 Plasma) for 2min bombardment to completely remove possible residual organics on the surface of the ITO glass substrate;

[0079] S3. Put the above-treated ITO substrate into the vacuum evaporation equipment, and under the condition that the vacuum degree is less th...

Embodiment 2

[0085] A small molecule photodetector, the structure from bottom to top is: ITO(120nm) / MoO 3 (10 nm) / cuprous iodide (3 nm) / compound M1: lead acetate (~0.6:1 composite film, n / n, 30 nm) / C60 (30 nm) / lithium fluoride (1 nm) / Al (100 nm).

[0086] The molecular formula and preparation method of above-mentioned compound M1 are as follows:

[0087]

[0088] Under nitrogen protection, 1.15 g of magnesium turnings (47.1 mmol) were added to 400 ml of n-butanol, and the temperature was raised to 125° C. for reflux reaction for 3 h until the magnesium turnings were completely dissolved. After cooling to room temperature, 1.00 g of compound 1 (4.7 mmol) and 1,2-dicyanobenzene for 4.83 h (37.7 mmol) were added to the reaction solution, stirred for 5 min, and then heated to 125 °C and refluxed for 48 h. After the reaction was completed, it was returned to room temperature, and 1.0 L of anhydrous methanol was added to the reaction solution, followed by stirring for 1 h. The reaction syst...

Embodiment 3

[0098]A small molecule photodetector array, the array is, from bottom to top, a pixel readout circuit array chip 201 made on a single crystal silicon substrate and composed of a silicon-based complementary metal-oxide-semiconductor transistor (MOSFET). , The readout circuit of each pixel is linked to the anode array 202 which defines the size of the pixel; above the electrode array are the hole transport layer 203 , the photosensitive layer 204 , the electron transport layer 205 , the common cathode layer 206 and the encapsulation layer 207 . Among them, 201 contains the connection contact 208 of the upper electrode and the single pixel readout circuit 209 connected to 202. The structures from 203 to 207 are continuous in the entire array area, and do not need patterning processing between pixels.

[0099] The patterned anode array 202 is a gold electrode with a thickness of 100 nm, the hole transport layer 203 is a stacked structure of a molybdenum oxide film (8 nm) and a cup...

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Abstract

A small molecule light detector comprises one or more photosensitive layers, and at least one layer of the photosensitive layer is a film obtained after co-evaporation of a compound with a large conjugated system and other compounds. According to the method, the compound of a large conjugated system and other compounds are evaporated together, so that a mixed film or a composite film is obtained, and impurities are removed in a post-treatment mode. According to the method, the high-temperature decomposition possibly caused by direct evaporation of the compound of the metal coordination large conjugated system can be avoided, so that the deposition of a thin film on a given substrate becomes possible, and the obtained organic light detector has excellent photoelectric response. The invention also relates to a micromolecule light detector array comprising the micromolecule light detector.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a small molecule photodetector and a preparation method thereof. Background technique [0002] Organic photodetectors have attracted widespread attention due to their low cost and potential advantages in fabricating large-area, flexible optoelectronic devices, especially in the fields of spectral detection and imaging. [0003] Organic photosensitive semiconductors with smaller molecular weights can be prepared into films by vacuum evaporation, which is compatible with the current process of OLED production lines. Among them, the compounds of the macroconjugated system and their metal complexes have good optoelectronic properties, especially the porphyrin derivatives, phthalocyanine derivatives and porphyrazine derivatives, which can easily modify the molecular skeleton to adjust the absorption range. [0004] However, the modifiability of porphyrin, phthalocyanine, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48H01L27/30C07D487/22
CPCC07D487/22H10K39/32H10K71/164H10K85/311H10K85/30H10K85/6572H10K30/00
Inventor 钟知鸣俞钢杨喜业黄飞
Owner GUANGZHOU GUANGDA INNOVATION TECH CO LTD
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