Chemical vapor deposited diamond films with ball-like surface morphologies for field electron emission are reported on Mo substrates.A transparent conducting thin film anode(indium-tin oxide film coated on glass subst...Chemical vapor deposited diamond films with ball-like surface morphologies for field electron emission are reported on Mo substrates.A transparent conducting thin film anode(indium-tin oxide film coated on glass substrate)technique was used to determine the locations of field emission sites on the film cathode.The emission site density was obtained by counting damage spots on the film anode by optical microscopy.These damage spots,caused by the impact of emission electrons,corresponded to the emission sites.With the ball-like diamond films,a low turn-on filed of 2.1 V/μm and high current density of 4 mA/cm2 from an emitting area of 0.3cm2 were obtained.A field enhancement model and injection mechanism have been developed to explain the low turn-on field and high emission current.展开更多
基金Supported by the 863 Program of the National Science and Technology Committee of China.
文摘Chemical vapor deposited diamond films with ball-like surface morphologies for field electron emission are reported on Mo substrates.A transparent conducting thin film anode(indium-tin oxide film coated on glass substrate)technique was used to determine the locations of field emission sites on the film cathode.The emission site density was obtained by counting damage spots on the film anode by optical microscopy.These damage spots,caused by the impact of emission electrons,corresponded to the emission sites.With the ball-like diamond films,a low turn-on filed of 2.1 V/μm and high current density of 4 mA/cm2 from an emitting area of 0.3cm2 were obtained.A field enhancement model and injection mechanism have been developed to explain the low turn-on field and high emission current.
