Three-dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes

Abstract Titanium dioxide (TiO2) nanotubes with vertically aligned array structures show substantial advantages in solar cells as an electron transport material that offers a large surface area where charges travel linearly along the nanotubes. Integrating this one-dimensional semiconductor material...

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Autores principales:	Kalyan C. Goddeti, Changhwan Lee, Young Keun Lee, Jeong Young Park
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d4dd5b065096431091fcb6da418824cc
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spelling	oai:doaj.org-article:d4dd5b065096431091fcb6da418824cc2021-12-02T16:08:03ZThree-dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes10.1038/s41598-018-25335-62045-2322https://doaj.org/article/d4dd5b065096431091fcb6da418824cc2018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25335-6https://doaj.org/toc/2045-2322Abstract Titanium dioxide (TiO2) nanotubes with vertically aligned array structures show substantial advantages in solar cells as an electron transport material that offers a large surface area where charges travel linearly along the nanotubes. Integrating this one-dimensional semiconductor material with plasmonic metals to create a three-dimensional plasmonic nanodiode can influence solar energy conversion by utilizing the generated hot electrons. Here, we devised plasmonic Au/TiO2 and Ag/TiO2 nanodiode architectures composed of TiO2 nanotube arrays for enhanced photon absorption, and for the subsequent generation and capture of hot carriers. The photocurrents and incident photon to current conversion efficiencies (IPCE) were obtained as a function of photon energy for hot electron detection. We observed enhanced photocurrents and IPCE using the Ag/TiO2 nanodiode. The strong plasmonic peaks of the Au and Ag from the IPCE clearly indicate an enhancement of the hot electron flux resulting from the presence of surface plasmons. The calculated electric fields and the corresponding absorbances of the nanodiode using finite-difference time-domain simulation methods are also in good agreement with the experimental results. These results show a unique strategy of combining a hot electron photovoltaic device with a three-dimensional architecture, which has the clear advantages of maximizing light absorption and a metal–semiconductor interface area.Kalyan C. GoddetiChanghwan LeeYoung Keun LeeJeong Young ParkNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kalyan C. Goddeti Changhwan Lee Young Keun Lee Jeong Young Park Three-dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes
description	Abstract Titanium dioxide (TiO2) nanotubes with vertically aligned array structures show substantial advantages in solar cells as an electron transport material that offers a large surface area where charges travel linearly along the nanotubes. Integrating this one-dimensional semiconductor material with plasmonic metals to create a three-dimensional plasmonic nanodiode can influence solar energy conversion by utilizing the generated hot electrons. Here, we devised plasmonic Au/TiO2 and Ag/TiO2 nanodiode architectures composed of TiO2 nanotube arrays for enhanced photon absorption, and for the subsequent generation and capture of hot carriers. The photocurrents and incident photon to current conversion efficiencies (IPCE) were obtained as a function of photon energy for hot electron detection. We observed enhanced photocurrents and IPCE using the Ag/TiO2 nanodiode. The strong plasmonic peaks of the Au and Ag from the IPCE clearly indicate an enhancement of the hot electron flux resulting from the presence of surface plasmons. The calculated electric fields and the corresponding absorbances of the nanodiode using finite-difference time-domain simulation methods are also in good agreement with the experimental results. These results show a unique strategy of combining a hot electron photovoltaic device with a three-dimensional architecture, which has the clear advantages of maximizing light absorption and a metal–semiconductor interface area.
format	article
author	Kalyan C. Goddeti Changhwan Lee Young Keun Lee Jeong Young Park
author_facet	Kalyan C. Goddeti Changhwan Lee Young Keun Lee Jeong Young Park
author_sort	Kalyan C. Goddeti
title	Three-dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes
title_short	Three-dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes
title_full	Three-dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes
title_fullStr	Three-dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes
title_full_unstemmed	Three-dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes
title_sort	three-dimensional hot electron photovoltaic device with vertically aligned tio2 nanotubes
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/d4dd5b065096431091fcb6da418824cc
work_keys_str_mv	AT kalyancgoddeti threedimensionalhotelectronphotovoltaicdevicewithverticallyalignedtio2nanotubes AT changhwanlee threedimensionalhotelectronphotovoltaicdevicewithverticallyalignedtio2nanotubes AT youngkeunlee threedimensionalhotelectronphotovoltaicdevicewithverticallyalignedtio2nanotubes AT jeongyoungpark threedimensionalhotelectronphotovoltaicdevicewithverticallyalignedtio2nanotubes
_version_	1718384686178238464

Three-dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes

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