Influence of TiO<sub>2</sub> nanostructures on the optical absorption of organic–inorganic perovskite

Zhongyi Liu; Mao Ye; Michel Ostrowski; Ya Sha Yi

doi:10.1117/1.JNP.10.026014

9 May 2016 Influence of TiO₂ nanostructures on the optical absorption of organic–inorganic perovskite

Zhongyi Liu, Mao Ye, Michel Ostrowski, Ya Sha Yi

Author Affiliations +

J. of Nanophotonics, 10(2), 026014 (2016). https://doi.org/10.1117/1.JNP.10.026014

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.

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Zhongyi Liu, Zhongyi Liu, Mao Ye, Mao Ye, Michel Ostrowski, Michel Ostrowski, Ya Sha Yi, 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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