Carbon nanotube filaments in household light bulbs

Wei, Jinquan; Zhu, Hongwei; Wu, Dehal; Wei, Bingqing
June 2004
Applied Physics Letters;6/14/2004, Vol. 84 Issue 24, p4869
Academic Journal
Household light bulbs made from macroscopic single-walled and double-walled carbon nanotube filaments were fabricated and tested. The nanotube bulbs are found to possess several interesting features when compared to a conventional tungsten filament in safelight (36 V, 40 W), such as lower threshold voltage for light emission and higher brightness at high voltages. Electrically induced excited peaks at 407, 417, 655 nm were identified to be an intrinsic property of nanotubes and these peaks are observed to become stronger in the light emission spectra at high temperatures which cannot be explained easily with the concept of blackbody emission. © 2004 American Institute of Physics.


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