title: Fermi energy level tuning for high performance dye sensitized solar cells using sp2 selective nitrogen-doped carbon nanotube channels.
abstract: Here, we find that doping sp(2) selective nitrogen, N sp(2), into carbon nanotube (CNT) channels induces a positive shift in the Fermi level of TiO(2) photoelectrodes. It is found that this results in the large diffusion coefficient of solar driven electrons for increasing the photocurrent as well as in the low recombination rate for improving open circuit voltage with 0.74 V, which could not be overcome by using pristine CNT channels with 0.66 V.
authors.affiliation: Graduate School of EEWS (WCU), Department of Materials Science & Engineering, KAIST, Daejeon, Korea.
authors.forename: Ga In
authors.initials: GI
authors.lastname: Lee
authors.forename: Narayan Chandra Deb
authors.initials: NC
authors.lastname: Nath
authors.forename: Subrata
authors.initials: S
authors.lastname: Sarker
authors.forename: Weon Ho
authors.initials: WH
authors.lastname: Shin
authors.forename: A J Saleh
authors.initials: AJ
authors.lastname: Ahammad
authors.forename: Jeung Ku
authors.initials: JK
authors.lastname: Kang
authors.forename: Jae-Joon
authors.initials: JJ
authors.lastname: Lee