Research Papers

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

[+] Author Affiliations
Zongyi Liu

General Motors Global R&D Center, Chemical and Materials Systems Laboratory, 30001 Van Dyke Avenue, Warren, Michigan 48090, United States

Mao Ye

University of Michigan, Integrated Nano Optoelectronics Laboratory, 4901 Evergreen Road ELB 171, Dearborn, Michigan 48128, United States

Michel Ostrowski

University of Michigan, Energy Institute, 2301 Bonisteel Boulevard, Ann Arbor, Michigan 48109, United States

Ya Sha Yi

University of Michigan, Integrated Nano Optoelectronics Laboratory, 4901 Evergreen Road ELB 171, Dearborn, Michigan 48128, United States

University of Michigan, Energy Institute, 2301 Bonisteel Boulevard, Ann Arbor, Michigan 48109, United States

J. Nanophoton. 10(2), 026014 (May 09, 2016). doi:10.1117/1.JNP.10.026014
History: Received March 12, 2016; Accepted April 18, 2016
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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.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Zongyi Liu ; Mao Ye ; Michel Ostrowski and Ya Sha Yi
"Influence of TiO2 nanostructures on the optical absorption of organic–inorganic perovskite", J. Nanophoton. 10(2), 026014 (May 09, 2016). ; http://dx.doi.org/10.1117/1.JNP.10.026014


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