Abstract:
PURPOSE: The n-doping material and the n-doping method of carbon nanotube and elements using the same are provided to secure the stability of long-term n-doping in the air by using tetramethylpyrazine and the derivative compounds of the same as n-doping materials. CONSTITUTION: The n-doping material of carbon nanotube includes a compound selected from a group including tetramethylpyrazine and the derivative compounds of the same. The n-doping method of carbon nanotube n-dopes the carbon nanotube using the n-doping material at room temperature. The n-doped state of the carbon nanotube is adjusted by adjusting the concentration of the compound. A thin film transistor includes a channel layer(50), source/drain electrodes(30, 40) formed on both sides of the channel layer, a gate layer(10) corresponding to the channel layer, and a gate insulating layer(20) formed between the channel layer and the gate layer. The channel layer includes the n-doped carbon nanotube.