Method for rapidly preparing organic small molecular nanorod

The invention discloses a method for rapidly preparing an organic small molecular nanorod. The method comprises the following specific steps: placing an ITO (Indium Tin Oxide) glass substrate over a crucible filled with an HPB material, and extracting gas in a cavity to form a vacuum state; heating the crucible filled with the HPB material to a first temperature point; rapidly heating the cruciblefrom the first temperature point to a second temperature point within 50 seconds; rapidly cooling the crucible from the second temperature point to the first temperature point within 2 minutes, and cooling the crucible from the first temperature point to room temperature within 10 minutes; inflating air into the cavity in order to recover the air pressure to the atmospheric pressure; taking out the ITO glass substrate, and placing the ITO glass substrate into absolute ethanol for performing ultrasonic treatment for a certain while, performing spin coating on any substrate, and heating the substrate to 80 DEG C for 1