Large-area molecular crystal and preparation method thereof
A molecular crystal, large-area technology, used in crystal growth, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc. high uniformity
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Embodiment 1
[0039] Example 1, Preparation and Characterization of CMUT Monolayer Molecular Crystals
[0040] The CMUT used in this embodiment is according to the literature (Wu, Q.et al.Dicyanomethylene-Substituted Fused Tetrathienoquinoid for High-Performance, Ambient-Stable, Solution-Processable n-Channel Organic Thin-Film Transistors.Chem.Mater.23,3138-3140 (2011)) method synthesis.
[0041] according to figure 1 As shown in the schematic diagram, a smaller-sized OTS hydrophobic substrate-modified oxide-doped silicon wafer is placed in a vessel at room temperature as a hydrophobic substrate, and an organic semiconductor with a volume concentration of 15 mg / mL is dripped on it. solution (the solvent is chlorobenzene), then cover it with an oxidation-doped silicon wafer whose size is slightly larger than that of the hydrophobic substrate as a hydrophilic substrate, and cover the vessel with a lid. After 12 hours, it was taken out, and a large-area organic semiconductor two-dimensional ...
Embodiment 2
[0045] Embodiment 2, device preparation
[0046] The CMUT organic semiconductor two-dimensional molecular crystal prepared in Example 1 was constructed into a field effect transistor by using a method of transferring a gold film by a mechanical probe.
[0047] Figure 5 a and Figure 5 b are the transfer characteristic curve and output characteristic curve of the field effect transistor with the CMUT two-dimensional molecular crystal structure, respectively. It can be seen that the mobility of the device can reach up to 2.8cm 2 V -1 the s -1 .
Embodiment 3
[0048] Example 3, Preparation and Characterization of HTEB Monolayer Molecular Crystals
[0049] The HTEB used in this embodiment is according to the literature (Meng, Q.et al.New Type of Organic Semiconductors for Field-Effect Transistors with Carbon-carbon Triple Bonds, Ambient-Stable, Solution-Processable n-Channel Organic Thin-FilmTransistors.J.Mater .Chem.19, 1477-1482 (2009)) method synthesis.
[0050] according to figure 1 As shown in the schematic diagram, a small BCB-modified oxide-doped silicon wafer is placed in a vessel at room temperature as a hydrophobic substrate, and an organic semiconductor solution with a volume concentration of 0.01 mg / mL is dripped on it. (the solvent is chlorobenzene), and then cover it with an oxidation-doped silicon wafer whose size is slightly larger than that of the hydrophobic substrate as a hydrophilic substrate, and cover the vessel lid. After 16 hours, it was taken out, and a large-area organic semiconductor two-dimensional molec...
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