BROWSE

Related Scientist

Researcher

Kalyan Chakravarthy Goddeti
나노물질 및 화학반응 연구단
more info

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

Cited 0 time in webofscience Cited 0 time in scopus
129 Viewed 61 Downloaded
Title
Three-dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes
Author(s)
Kalyan C. Goddeti; Changhwan Lee; Young Keun Lee; Jeong Young Park
Publication Date
2018-05
Journal
SCIENTIFIC REPORTS, v.8, no.1, pp.7330 -
Publisher
NATURE PUBLISHING GROUP
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. © 2018 The Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/4525
ISSN
2045-2322
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
Three dimensional hot electron photovoltaic device with vertically aligned TiO2 nanotubes.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse