Preparation method and application of ionic liquid modified quantum dots
A technology of ionic liquids and quantum dots, applied in chemical instruments and methods, semiconductor/solid-state device manufacturing, electric solid-state devices, etc., can solve problems such as hindering effective charge transfer, and achieve the improvement of device optoelectronic performance, improved stability, and continuous thin film. uniform effect
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Embodiment 1
[0037] This embodiment provides a method for preparing ionic liquid-modified quantum dots, and a semiconductor device prepared by using the ionic liquid-modified quantum dots. The preparation process is as figure 1 shown, including the following steps:
[0038] (1) Preparation of semiconductor quantum dots
[0039] Weigh 0.4383g of selenium powder and dissolve it in 5ml of tri-n-octylphosphine (TOP), stir magnetically at 60°C for 2h to form a TOPSe precursor; weigh 0.225g of lead oxide as the lead source, mix with 1ml of oleic acid and 7.5ml of Put the octanes together into a double-necked flask, add a magnetic stirrer, vacuumize the double-row tube system for 30 minutes, then pass in nitrogen, heat to 180°C in a nitrogen atmosphere, inject the TOPSe precursor into the double-necked flask, and control The reaction time is 3 minutes, and a dark brown PbSe semiconductor quantum dot solution can be obtained. Add a small amount of chloroform and 10ml methanol to it, pour it int...
Embodiment 2
[0055] This embodiment provides a method for preparing ionic liquid-modified quantum dots, and a semiconductor device prepared by using the ionic liquid-modified quantum dots. Except that no ionic liquid is added in step (2), other preparation processes are the same as in embodiment 1.
[0056] Specifically, step (2) is to take 40 mg of PbSe semiconductor quantum dots prepared in step (1) and disperse them in 2 ml of toluene to obtain a PbSe quantum dot-toluene solution, which is used for spin coating and preparing field effect transistors.
[0057] The photoelectric test results are shown in Table 1.
Embodiment 3
[0059] This embodiment provides a method for preparing ionic liquid-modified quantum dots, and a semiconductor device prepared by using the ionic liquid-modified quantum dots. Except for changing the amount of ionic liquid added in step (2), other preparation processes are the same as in embodiment 1.
[0060] Specifically, step (2) is to take 20 mg of PbSe semiconductor quantum dots prepared in step (1) and disperse them in 2 ml of toluene to obtain a PbSe quantum dot-toluene solution, and add 10 mg of ionic liquid 1-amine to the PbSe quantum dot-toluene solution Propyl-3-methylimidazolium bromide, ultrasonic 1h to make it uniformly dispersed.
[0061] The photoelectric test results are shown in Table 1.
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