Low-temperature ionic layer adsorption and reaction grown anatase TiO 2 nanocrystalline films for efficient perovskite solar cell and gas sensor applications

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Date
2018-07-20
Authors
Shaikh, Shoyebmohamad F.
Ghule, Balaji G.
Nakate, Umesh T.
Shinde, Pritamkumar V.
Ekar, Satish U.
O'Dwyer, Colm
Kim, Kwang Ho
Mane, Rajaram S.
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Publisher
Springer Nature
Published Version
10.1038/s41598-018-29363-0
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Abstract
A low-temperature (90 °C) and directly grown anatase titanium dioxide (TiO2) nanocrystalline film using successive ionic layer adsorption and reaction (SILAR) for perovskite solar cell and gas sensor applications. TiO2 nanocrystalline electron transfer layer (ETL) improves the power conversion efficiency (PCE) of perovskite solar cells due to faster charge transport kinetics as well as slower charge recombination process. The optimized TiO2 nanocrystalline ETL (15 L) demonstrates as high as ~10% PCE with a short circuit current density of 18.0 mA/cm2, open circuit voltage of 0.81 V and fill factor of 66.3% in perovskite solar cells. Furthermore, room-temperature ammonia sensing characteristics of TiO2 nanocrystalline film (25 L) were  demonstrated for various concentration levels of ammonia in dry air conditions. A high room-temperature response of 80% was achieved at 100 ppm of ammonia with rapid response and recovery signatures of 30 and 85 s, and nearly fifteen days stability, respectively. The response of the sensor to other gases such as formaldehyde, petrol, ethanol acetone, and ammonia etc, indicated a high selectivity towards volatile organic compounds of ammonia gas. The room temperature operation, with high selectivity, repeatability and fast transition times, suggests potentially useful in flexible and cost-effective production in optoelectrochemical device technology.
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Keywords
Adsorption , Transition metal oxides , Optoelectrochemical device technology , Electron transfer layer , TiO2 , Titanium dioxide , Organic–inorganic nanostructures , Metal-organic frameworks
Citation
Shaikh, S. F., Ghule, B. G., Nakate, U. T., Shinde, P. V., Ekar, S. U., O’Dwyer, C., Kim, K. H. and Mane, R. S. (2018) 'Low-Temperature Ionic Layer Adsorption and Reaction Grown Anatase TiO2 Nanocrystalline Films for Efficient Perovskite Solar Cell and Gas Sensor Applications', Scientific Reports, 8(1), pp. 11016. doi: 10.1038/s41598-018-29363-0
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https://www.nature.com/articles/s41598-018-29363-0
URI
https://hdl.handle.net/10468/6569
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Chemistry - Journal Articles
Environmental Research Institute - Journal Articles
Tyndall National Institute - Journal Articles
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© The Author(s) 2018. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.