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Method for preparing large-area two-dimensional organic semiconductor crystalline film through two-step method

An organic semiconductor, large-area technology, which is applied in the field of two-step preparation of large-area two-dimensional organic semiconductor crystalline thin films, can solve the problems of cumbersome steps and poor film quality, and achieves low preparation cost, simple preparation steps, and high level of operation. low effect

Pending Publication Date: 2022-03-29
无锡学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing methods for preparing two-dimensional organic semiconductor crystalline thin films are cumbersome and the quality of the prepared thin films is poor.

Method used

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  • Method for preparing large-area two-dimensional organic semiconductor crystalline film through two-step method
  • Method for preparing large-area two-dimensional organic semiconductor crystalline film through two-step method
  • Method for preparing large-area two-dimensional organic semiconductor crystalline film through two-step method

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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the rectangular cavity device of the present invention includes a lower substrate a, silver wires c placed on the left and right sides of the lower substrate a, and an upper substrate d placed on the silver wire, wherein the lower substrate a and the upper substrate d are placed oppositely, The silver wire c separates the lower substrate a from the upper substrate d to form a rectangular cavity f. The C8-BTBT raw material b is coated on the lower substrate a and crystallized in the rectangular cavity f.

[0033] The two-step method of the present invention prepares the method for large-area two-dimensional organic semiconductor crystalline film comprising the following steps:

[0034] (1) Coating raw materials for the lower substrate: the substrates used need to be ultrasonically cleaned with acetone, isopropanol, and deionized water for 15 minutes, and then dried with a nitrogen gun before use. Both the upper and lower substrates are grown wi...

Embodiment 2

[0043] The two-step method of the present invention prepares the method for large-area two-dimensional organic semiconductor crystalline film comprising the following steps:

[0044](1) Coating raw materials for the lower substrate: the substrates used need to be ultrasonically cleaned with acetone, isopropanol, and deionized water for 20 minutes, and then dried with a nitrogen gun before use. Both the upper and lower substrates are grown with 200 nanometers of SiO 2 SiO 2 / Si wafer; take about 0.05 mg C 8 - BTBT raw materials are evenly applied to the lower substrate, leaving silver wires on the edges of both sides, and there should be no lumps of raw materials, otherwise it will be easily adsorbed to the upper substrate when the substrate is covered, resulting in growth failure;

[0045] (2) Construct a rectangular growth cavity: Place 150 micron silver wires on both sides of the lower substrate coated with raw materials. After placing the silver wires, cover the upper subs...

Embodiment 3

[0051] The steps of growing and patterning a two-dimensional organic semiconductor crystalline film using a mask are as follows:

[0052] (1) Construct a growing rectangular cavity, and spread a layer of C evenly on the lower substrate 8 - BTBT raw material, then place a 10mm x 10mm reticle under the upper substrate so that the reticle is at C 8 - On the BTBT raw material layer, a mask such as Figure 9 ;

[0053] (2) Place the rectangular growth cavity on a heating platform for heating, the temperature is 250° C., and the heating time is controlled to 2 minutes. After the growth is over, the patterned film grows out with a small amount of bilayers, such as Figure 10 As shown, this will serve as a patterned master for the next step of recrystallization growth.

[0054] (3) if Figure 11 As shown, the patterned pre-crystallized master was heated and grown at 120 °C for 2 minutes, and the patterned master was heated and grown, and the quality of the monolayer film was impr...

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Abstract

The invention discloses a method for preparing a large-area two-dimensional organic semiconductor crystalline film by a two-step method. The method comprises the following steps: uniformly coating an organic semiconductor material on a lower substrate; constructing a rectangular growth cavity for organic semiconductor material crystallization on the lower substrate; at a first temperature, the organic semiconductor material in the rectangular growth cavity is pre-crystallized to generate a mother set; and recrystallizing the mother set at a second temperature to obtain the product. According to the method, the organic crystalline film is pre-grown through a sublimation method, the number of layers of the crystalline film can be accurately controlled through temperature and time, and a large-area single-layer two-dimensional organic semiconductor crystalline film can be obtained through further heating and regrowth. Compared with other two-dimensional organic semiconductor crystalline state film growth methods, the method has the advantages that the preparation cost is lower, the required operation level is lower, and more importantly, the prepared crystalline state film is large in area, and the method can meet the growth of form-adjustable organic semiconductors in different functional applications.

Description

technical field [0001] The invention relates to the technical field of preparation of microelectronic devices, in particular to a two-step method for preparing a large-area two-dimensional organic semiconductor crystalline thin film. Background technique [0002] Compared with inorganic semiconductor materials, organic semiconductor materials can be prepared by solution method at low cost, and have obvious advantages in terms of good biocompatibility, flexibility and flexible structure tailorability. Based on this, organic semiconductor crystals can show good application potential in various multifunctional electronic devices, such as organic field-effect transistors (OFETs), organic light-emitting diodes (OLEDs), organic solar cells (OSCs), etc. Research on organic semiconductor materials has increased significantly; in recent years, two-dimensional organic semiconductor crystalline thin films have attracted the attention of extensive researchers as a new organic semiconduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/00H10K99/00
CPCH10K71/12H10K71/40
Inventor 杨成东马文烨苏琳琳张见陶旭
Owner 无锡学院
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