Carbon-doped freestanding TiO2 nanotube arrays in dye-sensitized solar cells. (8th December 2016)

• Record Type: Journal Article
• Authors: Rho, Won-Yeop; Kim, Ho-Sub; Kim, Hyung-Mo; Suh, Jung Sang; Jun, Bong-Hyun
• Is Part Of: New journal of chemistry. Volume 41:Number 1(2017)
• Page Start: 285
• Page End: 289
• Publication Date: 2016-12-08
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c6nj02615j
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : DSSCs with TiO2 nanotube arrays that were doped with carbon to improve their electron transport for energy conversion efficiency. Abstract : Dye-sensitized solar cells (DSSCs) were fabricated with both closed- and open-ended freestanding TiO2 nanotube arrays that were doped with carbon via chemical vapor deposition to improve their electron transport properties. The energy conversion efficiencies of DSSCs increased from 5.07% to 6.21% after doping with a small amount of carbon, i.e., an enhancement of 22.4%. This suggests that the π–π conjugation introduced by carbon doping improved the efficiency of electron transport. However, energy conversion efficiencies of DSSCs with a large amount of carbon doping on the TiO2 nanotube arrays decreased from 5.07% to 2.87%, with a lower short-circuit current, open circuit voltage, and fill factor because of the reduced level of dye adsorption on the TiO2 nanotube arrays.