A kind of flexible fibrous perovskite solar cell and its preparation method
A technology of solar cells and flexible fibers, applied in the field of solar cells, can solve the problems of poor flexibility, poor stability and instability of solar cells, and achieve the effects of high photoelectric conversion efficiency, simple process and low requirements.
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[0040] With reference figure 2 and image 3 , introduce a specific embodiment of the preparation method of the flexible fibrous perovskite solar cell of the present invention, the method specifically includes the following steps:
[0041] S1, provide a carbon nanotube fiber ( image 3 a) As the conductive electrode 20, what needs to be explained here is that the carbon nanotube fibers are synthesized in a tube furnace by chemical vapor deposition to form a spinnable carbon nanotube array, and then directly from the carbon nanotube array through a rotatable probe. Spun to obtain carbon nanotube fibers as conductive electrodes. Preferably, the diameter of the carbon nanotube fiber is 10-25 μm, the wall number of the carbon nanotube contained therein is 2-6, and the tube diameter is 5-20 nm.
[0042] S2, providing another carbon nanotube fiber 101 ( image 3 a), covering its surface with n-TiO in sequence 2 The layer 102 , the perovskite layer 104 , the hole transport layer 1...
Embodiment 1
[0053] Place carbon nanotube fibers (10 μm in diameter, 2 carbon nanotube walls, and 5 nm diameter) in a butyl titanate solution with a concentration of 0.2 mol / L and pH=3 for 1 minute (repeat the operation once ), dried in air for 5 minutes after taking it out, and annealed in air at 500°C for 20 minutes, then placed in commercially available meso-TiO2 with a concentration of 0.5mol for 10 minutes, took it out and annealed in air at 500°C for 30 minutes minute. Afterwards, carbon nanotube fibers covered with n-TiO2 layer and meso-TiO2 layer pass through perovskite droplets with a concentration of 0.2mol / L, and are placed on a heating table at 150°C to move back and forth for 30 times (setting reciprocating The pump speed is 10mm / min). After completion, put it in the poly-3-hexylthiophene / single-walled carbon nanotube composite solution with a concentration of 1mol / L for 10min, take it out and dry it naturally in the air. Afterwards, the carbon nanotube fibers were placed in...
Embodiment 2
[0060] Place carbon nanotube fibers (15 μm in diameter, 4 carbon nanotube walls, and 10 nm diameter) in a butyl titanate solution with a concentration of 0.4 mol / L and pH=4 for 1 minute (repeat the operation 2 times) ), dried in air for 5 minutes after taking it out, and annealed in air at 450°C for 30 minutes. Then place it in commercially available meso-TiO2 with a concentration of 0.5mol for 10 minutes, take it out and place it in air at 500°C for 30 minutes for annealing. Afterwards, carbon nanotube fibers covered with n-TiO2 layer and meso-TiO2 layer pass through the perovskite droplet of 0.2mol / L, and are placed on a heating platform at 200°C to wrap back and forth 40 times (set the reciprocating pump speed as 15mm / min). After completion, place it in a solution of poly-3-hexylthiophene / single-walled carbon nanotubes with a concentration of 1mol / L for 10 minutes, take it out and dry it naturally in the air. Afterwards, the carbon nanotube fibers were placed in a silver ...
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