boron nitride nanotube paste compositions , electron emission sources including the same , electron emission devices including the same and backlight units and electron emission display devices including the same are provided . a boron nitride nanotube paste composition includes about 100 parts by weight boron nitride nanotubes , from about 500 to about 2000 parts by weight glass frit , from about 1000 to about 2000 parts by weight filler , from about 2000 to about 4000 parts by weight organic solvent , and from about 4000 to about 6000 parts by weight polymer binder . electron emission devices including the boron nitride nanotube electron emission sources have longer lifespan and improved uniformity among pixels .