A kind of semiconductor cds/cdsse heterojunction nanowire and preparation method thereof
A nanowire and heterojunction technology, applied in semiconductor devices, chemical instruments and methods, crystal growth, etc., can solve problems such as difficult steam control, inaccurate growth control, and difficulty in high-quality heterojunction nanowires
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Embodiment 1
[0097] Example 1 Preparation of CdS / CdSSe heterojunction nanowires
[0098] like figure 1 As shown, a quartz tube with a length of 150 cm and an inner diameter of 45 microns is placed in a horizontal tube furnace, and then No. 1 magnetic boats filled with high-purity cadmium sulfide (Alfa Aesar, greater than 99.99%) are placed in the furnace for heating At the center position, place No. 2 magnetic boat containing cadmium selenide (Alfa Aesar, more than 99.99%) powder in the evaporation area, and place No. 3 magnetic boat containing cadmium sulfide powder outside the upstream heating area before heating, and No. 3 magnetic boat A quartz rod is set between the boat and the No. 2 magnetic boat, and the No. 3 magnetic boat is connected with the propulsion device; the propulsion device is composed of a synchronous motor and a quartz rod fixed on the synchronous motor, which is used to push the No. The purpose of the react source. A silicon wafer with a 10nm thick gold film on the s...
Embodiment 2
[0101] Example 2 Preparation of CdS / CdSSe / CdS heterojunction nanowires
[0102] use as figure 1 As shown in the device, a quartz tube with a length of 150 cm and an inner diameter of 45 microns is placed in a horizontal tube furnace, and then the No. 3 magnetic boat filled with high-purity cadmium sulfide (Alfa Aesar, greater than 99.99%) is placed in the furnace for heating At the center, place No. 1 magnetic boat filled with high-purity cadmium sulfide (Alfa Aesar, greater than 99.99%) between the air inlet and No. 3 magnetic boat, and outside the heating zone of the horizontal tube furnace. No. 1 magnetic boat Quartz rods are set between the No. 3 magnetic boat and the No. 2 magnetic boat; the No. 2 magnetic boat is placed between the air inlet and the No. 1 magnetic boat, and the quartz rod is set between the No. 1 magnetic boat and the No. 2 magnetic boat. The device is connected, and the propulsion device is composed of a synchronous motor and a quartz rod fixed on the ...
Embodiment 3
[0104] use as figure 1 As shown in the device, a quartz tube with a length of 150 cm and an inner diameter of 45 microns is placed in a horizontal tube furnace, and then No. 1 magnetic boats filled with high-purity cadmium sulfide (Alfa Aesar, greater than 99.99%) are placed in the furnace At the center of heating, place No. 2 magnetic boat containing cadmium selenide (Alfa Aesar, greater than 99.99%) powder in the evaporation area, and place No. 3 magnetic boat containing cadmium sulfide powder outside the upstream heating area before heating. No. 3 A quartz rod is set between the magnetic boat and the No. 2 magnetic boat, and the No. 3 magnetic boat is connected with the propulsion device; The purpose of replacing the reactive source. A silicon wafer with a 5nm thick gold film on the surface was placed downstream of the evaporation zone (that is, the deposition zone) to collect samples. Before heating, pass nitrogen gas at a rate of 100SCCM, remove the oxygen in the cavity...
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