9 May 2016 Influence of TiO2 nanostructures on the optical absorption of organic–inorganic perovskite
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Abstract
This work aims to reveal the strong influence of TiO2 nanostructures on the light absorption property of TiO2 and perovskite mixture. Three TiO2 nanostructures, i.e., nanoparticles (S1), ultrapure nanorods (S2), and ultrasmall nanorods (S3), were studied: S1 was selected as a baseline; S2 and S3 were synthesized from S1 by using modified hydrothermal processes. Mesoporous TiO2 thin films were spin-coated from solutions containing these TiO2 nanorods and nanoparticles (S1 as baseline). Organic–inorganic hybrid perovskite CH3NH3PbI3 was then incorporated into these mesoporous TiO2 thin films. Optical absorption results showed that the perovskite mixture with ultrasmall TiO2 nanostructures (S3) has significantly higher optical absorption coefficient. Finite-difference time domain models were built based on three distinct nanostructures of TiO2 and CH3NH3PbI3 mixtures fabricated (S1 to S3) to understand their optical absorption properties. Our work is promising to fabricate TiO2 nanostructures, as a backbone structure, for a series of applications including photovoltaics and photodetection.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhongyi Liu, Mao Ye, Michel Ostrowski, Ya Sha Yi, "Influence of TiO2 nanostructures on the optical absorption of organic–inorganic perovskite," Journal of Nanophotonics 10(2), 026014 (9 May 2016). https://doi.org/10.1117/1.JNP.10.026014 . Submission:
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