Improved Energy Conversion Efficiency of Dye-sensitized Solar Cells Fabricated using Open-ended TiO 2 Nanotube Arrays with Scattering Layer

• Published in: Bulletin of the Korean Chemical Society Vol. 35; no. 4; pp. 1165 - 1168
• Main Authors: Rho, Won-Yeop, Chun, Myeoung-Hwan, Kim, Ho-Sub, Hahn, Yoon-Bong, Suh, Jung Sang, Jun, Bong-Hyun
• Format: Journal Article
• Language: Korean
• Published: 2014
• Subjects: Open-ended $TiO_2$ nanotube arrays; Dye-sensitized solar cells (DSSCs); Scattering layer
• ISSN: 0253-2964; 1229-5949

We prepared dye-sensitized solar cells (DSSCs) with enhanced energy conversion efficiency using open-ended $TiO_2$ nanotube arrays with a $TiO_2$ scattering layer. As compared to closed-ended $TiO_2$ nanotube arrays, the energy conversion efficiency of the open-ended $TiO_2$ nanotube arrays was increased from 5.63% to 5.92%, which is an enhancement of 5.15%. With the $TiO_2$ scattering layer, the energy conversion efficiency was increased from 5.92% to 6.53%, which is an enhancement of 10.30%. After treating the open-ended $TiO_2$ nanotube arrays with $TiCl_4$, the energy conversion efficiency was increased from 6.53% to 6.89%, a 5.51% enhancement, which is attributed to improved light harvesting and increased dye adsorption.