Direct Low-Temperature Growth of Single-Crystalline Anatase TiO2 Nanorod Arrays on Transparent Conducting Oxide Substrates for Use in PbS Quantum-Dot Solar Cells

作者：Chung Hyun Suk; Han Gill Sang; Park So Yeon; Shin Hee Won; Ahn Tae Kyu; Jeong Sohee; Cho In Sun^*; Jung Hyun Suk

来源：ACS Applied Materials & Interfaces, 2015, 7(19): 10324-10330.

DOI：10.1021/acsami.5b00948

• anatase TiO2
• nanorod arrays
• low-temperature solution growth
• depleted heterojunction solar cells
• charge transport

We report On the direct growth of anatase TiO2 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 lowtemperature 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 (TiO2/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 TiO2 nanopartide-based solar cells.

• 出版日期2015-5-20