1 research outputs found
Direct Low-Temperature Growth of Single-Crystalline Anatase TiO<sub>2</sub> Nanorod Arrays on Transparent Conducting Oxide Substrates for Use in PbS Quantum-Dot Solar Cells
We report on the direct growth of
anatase TiO<sub>2</sub> nanorod
arrays (A-NRs) on transparent conducting oxide (TCO) substrates that
can be directly applied to various photovoltaic devices via a seed
layer mediated epitaxial growth using a facile low-temperature hydrothermal
method. We found that the crystallinity of the seed layer and the
addition of an amine functional group play crucial roles in the A-NR
growth process. The A-NRs exhibit a pure anatase phase with a high
crystallinity and preferred growth orientation in the [001] direction.
Importantly, for depleted heterojunction solar cells (TiO<sub>2</sub>/PbS), the A-NRs improve both electron transport and injection properties,
thereby largely increasing the short-circuit current density and doubling
their efficiency compared to TiO<sub>2</sub> nanoparticle-based solar
cells