TY - JOUR
T1 - Low-Temperature Crystalline Titanium Dioxide by Atomic Layer Deposition for Dye-Sensitized Solar Cells
AU - Chandiran, Aravind Kumar
AU - Yella, Aswani
AU - Stefik, Morgan
AU - Heiniger, Leo-Philipp
AU - Comte, Pascal
AU - Nazeeruddin, Mohammad. K.
AU - Grätzel, Michael
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-C1-015- 21
Acknowledgements: The authors acknowledge the financial contribution from EU FP7 project "ORION" grant agreement number NMP-229036. We are grateful for the financial support from the Balzan foundation as a part of the 2009 Balzan Prize awarded to Michael Graetzel. This publication is partially based on work supported by the Center for Advanced Molecular Photovoltaics (Award No KUS-C1-015- 21), made by King Abdullah University of Science and Technology (KAUST). MS is grateful for financial support from the Swiss Commission for Technology and Innovation (CTI) (Award No 13369.1 PFFLR-NM).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2013/4/4
Y1 - 2013/4/4
N2 - Low-temperature processing of dye-sensitized solar cells (DSCs) is crucial to enable commercialization with low-cost, plastic substrates. Prior studies have focused on mechanical compression of premade particles on plastic or glass substrates; however, this did not yield sufficient interconnections for good carrier transport. Furthermore, such compression can lead to more heterogeneous porosity. To circumvent these problems, we have developed a low-temperature processing route for photoanodes where crystalline TiO2 is deposited onto well-defined, mesoporous templates. The TiO2 is grown by atomic layer deposition (ALD), and the crystalline films are achieved at a growth temperature of 200 C. The ALD TiO2 thickness was systematically studied in terms of charge transport and performance to lead to optimized photovoltaic performance. We found that a 15 nm TiO2 overlayer on an 8 μm thick SiO2 film leads to a high power conversion efficiency of 7.1% with the state-of-the-art zinc porphyrin sensitizer and cobalt bipyridine redox mediator. © 2013 American Chemical Society.
AB - Low-temperature processing of dye-sensitized solar cells (DSCs) is crucial to enable commercialization with low-cost, plastic substrates. Prior studies have focused on mechanical compression of premade particles on plastic or glass substrates; however, this did not yield sufficient interconnections for good carrier transport. Furthermore, such compression can lead to more heterogeneous porosity. To circumvent these problems, we have developed a low-temperature processing route for photoanodes where crystalline TiO2 is deposited onto well-defined, mesoporous templates. The TiO2 is grown by atomic layer deposition (ALD), and the crystalline films are achieved at a growth temperature of 200 C. The ALD TiO2 thickness was systematically studied in terms of charge transport and performance to lead to optimized photovoltaic performance. We found that a 15 nm TiO2 overlayer on an 8 μm thick SiO2 film leads to a high power conversion efficiency of 7.1% with the state-of-the-art zinc porphyrin sensitizer and cobalt bipyridine redox mediator. © 2013 American Chemical Society.
UR - http://hdl.handle.net/10754/598741
UR - https://pubs.acs.org/doi/10.1021/am400866s
UR - http://www.scopus.com/inward/record.url?scp=84876724843&partnerID=8YFLogxK
U2 - 10.1021/am400866s
DO - 10.1021/am400866s
M3 - Article
C2 - 23506374
SN - 1944-8244
VL - 5
SP - 3487
EP - 3493
JO - ACS Applied Materials & Interfaces
JF - ACS Applied Materials & Interfaces
IS - 8
ER -
