NOVELTY - Preparation of polythiophene-carbon nanotube composite photoconductive material through click chemistry includes dissolving alkynyl-modified carbon nanotube in N-methylpyrrolidone; dissolving polythiophene in tetrahydrofuran; mixing the two solutions; adding cuprous iodide and 1,8-diazabicyclo(5.4.0)undec-7-ene; reacting under the protection of nitrogen gas to obtain polythiophene-carbon nanotube composite photoconductive material; dispersing in chloroform; ultrasonically treating; coating on conductive substrate; and drying.    USE - Preparation of polythiophene-carbon nanotube composite photoconductive material (claimed) useful in the fields of solar battery material and optoelectronic conversion material.    ADVANTAGE - The composite photoconductive material has high photosensitivity, compatibility, and thermostability; and excellent solubility properties, film forming properties, and photoelectric properties. The dispersing uniformity and storage stability of composite photoconductive material are better than that of prior art physical co-mixing method. The method has simple steps, high film coating quality, high input-output ratio, and low cost; and provides green and environment-friendly product having high performance.    DETAILED DESCRIPTION - Preparation of polythiophene-carbon nanotube composite photoconductive material through click chemistry comprises:    (A) adding 150 ml mixed strong acid solution of concentrated sulfuric acid and concentrated nitric acid at 3:1 volume ratio to 100-1000 mg multiwalled carbon nanotube; ultrasonically vibrating for 3-12 hours; pouring to deionized water; standing for 6-36 hours; filtering and water washing until neutral; and vacuum drying for 2-12 hours at 30-80 degrees C to obtain carbon nanotube with carboxy group;    (B) placing 80-800 mg carbon nanotube with carboxy group in excessive thionyl chloride under the protection of nitrogen gas and refluxing for 12-72 hours; after reaction, depressurizing and distilling thionyl chloride; and vacuum drying for 2-12 hours at 30-80 degrees C to obtain chlorinated carbon nanotube;    (C) dispersing 15-100 mg chlorinated carbon nanotube in 10-50 ml N-methylpyrrolidone; ultrasonically treating for 10-30 minutes; adding 0.95-6.3 g 4-(3-methylsilylethynyl)aniline and 0.67-4.5 ml isopentyl nitrite; continuously reacting for 24-48 hours at 70 degrees C under the protection of nitrogen gas; cooling to room temperature and pouring into 50-200 ml ethanol; precipitating; centrifuging and filtering; washing with tetrahydrofuran and dichloromethane; vacuum drying for 6-24 hours at 30-80 degrees C; dispersing carbon nanotube in 10-50 ml N-methylpyrrolidone; adding 1-5 ml tetrahydrofuran containing 2 mol/L tetrabutylammonium fluoride; stirring for 2 hours at normal temperature; adding to 50-200 ml ethanol; precipitating and centrifuging; washing with tetrahydrofuran and dichloromethane; and vacuum drying for 6-36 hours at 30-80 degrees C to obtain alkynyl-modified carbon nanotube;    (D) adding 1.6-16 g thiophene to dry three-neck flask filled with 10-100 ml tetrahydrofuran; injecting 2.5-25 ml of 2 mol/L Grignard reagent; refluxing for 2 hours under the protection of nitrogen gas; cooling to 22-25 degrees C; adding 0.05-0.5 g 1,3-bis(diphenylphosphino)propane nickel chloride; reacting for 5-30 minutes; continuously adding 1-10 ml of 1 mol/L Grignard reagent; reacting for 2-5 minutes; adding reaction solution to methanol; precipitating and centrifuging; vacuum drying at 50 degrees C; subjecting to Soxhlet extraction using methanol, n-hexane, and chloroform; removing catalyst impurities; and vacuum drying for 6-36 hours at 30-80 degrees C to obtain regular polythiophene;    (E) dissolving 5-50 mg alkynyl-modified carbon nanotube in 5-50 ml N-methylpyrrolidone; dissolving 25-250 mg polythiophene in 12-120 ml tetrahydrofuran; mixing the two solutions; adding 2-20 mg cuprous iodide and 40-400 mg 1,8-diazabicyclo(5.4.0)undec-7-ene; stirring and reacting for 48-72 hours at 40-90 degrees C under the protection of nitrogen gas for 48-72 hours; cooling to room temperature; pouring into 50-500 ml ethanol and precipitating; centrifuging; washing with tetrahydrofuran and dichloromethane for multiple times; and vacuum drying for 6-36 hours at 30-80 degrees C to obtain polythiophene-carbon nanotube composite photoconductive material;    (F) dispersing 5-50 mg prepared polythiophene-carbon nanotube composite photoconductive material in chloroform in a concentration of 1-10 mg/ml; and ultrasonically treating for 0.5-8 hours in an ultrasonic tank to obtain polythiophene-carbon nanotube composite photoconductive material solution; and    (G) coating polythiophene-carbon nanotube composite photoconductive material solution on conductive substrate at spinning rate of 1000-2000 revolutions/s; and drying at 35-120 degrees C for 0.5-6 hours, where thickness of dried polythiophene-carbon nanotube composite photoconductive coating is 10-50 mu m.