Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 19, Pages 10324-10330Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b00948
Keywords
anatase TiO2; nanorod arrays; low-temperature solution growth; depleted heterojunction solar cells; charge transport
Funding
- National Research Foundation of Korea (NRF) grants - Ministry of Science, ICT & Future Planning (MSIP) of Korea [NRF-2014R1A4A1008474, 2014R1A2A2A01007722, 2012M3A7B4049967, 2012M3A6A7054861]
- National Research Foundation of Korea [2014R1A2A2A01007722] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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.
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