|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||2016 Functional Nanomaterials: Emerging Nanomaterials and Techniques for 3D Architectures
||Energy Conversion and Storage Applications of Mesoporous Titania Thin Films with Controlled Pore Orientation
||Suraj R Nagpure, Syed Islam, Stephen E. Rankin
|On-Site Speaker (Planned)
||Suraj R Nagpure
Mesoporous titania thin films with 2D Hexagonal Close Packed (HCP) cylindrical nanopores have been synthesized by the evaporation-induced self-assembly (EISA) technique with Pluronic surfactant F127 as template. To provide orthogonal alignment, surface modification of substrates with crosslinked F127 has been used. GISAXS studies show that the orthogonal hexagonal mesostructure forms directly by a disorder-order transition. F127 provides pores with 8-9 nm diameter, which is precisely the structure expected to provide short carrier diffusion length and high hole conductivity required for efficient bulk heterojunction solar cells. Using these films as window layer and CdTe as absorber, a power conversion efficiency of 5.53% has been obtained which is 3 times higher than that obtained using planar titania films. These films are also used as negative anodes in Li-ion batteries where their high surface area and thin walls allow for rapid Li ion diffusion and efficient insertion without capacity fading.