Skip to content Skip to navigation
University of Warwick
  • Study
  • |
  • Research
  • |
  • Business
  • |
  • Alumni
  • |
  • News
  • |
  • About

University of Warwick
Publications service & WRAP

Highlight your research

  • WRAP
    • Home
    • Search WRAP
    • Browse by Warwick Author
    • Browse WRAP by Year
    • Browse WRAP by Subject
    • Browse WRAP by Department
    • Browse WRAP by Funder
    • Browse Theses by Department
  • Publications Service
    • Home
    • Search Publications Service
    • Browse by Warwick Author
    • Browse Publications service by Year
    • Browse Publications service by Subject
    • Browse Publications service by Department
    • Browse Publications service by Funder
  • Help & Advice
University of Warwick

The Library

  • Login
  • Admin

Highly sensitive terahertz thin-film total internal reflection spectroscopy reveals in situ photoinduced structural changes in methylammonium lead halide perovskites

Tools
- Tools
+ Tools

Sun, Qiushuo, Liu, Xudong, Cao, Jie, Stantchev, Rayko I., Zhou, Yang, Chen, Xuequan, Parrott, Edward P. J., Lloyd-Hughes, James, Zhao, Ni and Pickwell-MacPherson, Emma (2018) Highly sensitive terahertz thin-film total internal reflection spectroscopy reveals in situ photoinduced structural changes in methylammonium lead halide perovskites. The Journal of Physical Chemistry C, 122 (30). pp. 17552-17558. doi:10.1021/acs.jpcc.8b05695 ISSN 1932-7447.

[img]
Preview
PDF
WRAP-highly-sensitive-terahertz thin-film-total-internal-reflection-spectroscopy-Pickwell-MacPherson-2018.pdf - Accepted Version - Requires a PDF viewer.

Download (1561Kb) | Preview
Official URL: http://dx.doi.org/10.1021/acs.jpcc.8b05695

Request Changes to record.

Abstract

Terahertz (THz) thin-film total internal reflection (TF-TIR) spectroscopy is shown to have an enhanced sensitivity to the vibrational properties of thin films in comparison with standard THz transmission spectroscopy. This increased sensitivity was used to track photoinduced modifications to the structure of thin films of methylammonium (MA) lead halide, MAPbI3–xBrx (x = 0, 0.5, 1, and 3). Initially, illumination strengthened the phonon modes around 2 THz, associated with Pb–I stretch modes coupled to the MA ions, whereas the 1 THz twist modes of the inorganic octahedra did not alter in strength. Under longer term illumination, the 1 THz phonon modes of encapsulated films slowly reduced in strength, whereas in films exposed to moisture and oxygen, these phonons weaken more rapidly and blue-shift in frequency. The rapid monitoring of environmentally induced changes to the vibrational modes afforded by TF-TIR spectroscopy offers applications in the characterization and quality control of the perovskite thin-film solar cells and other thin-film semiconductors.

Item Type: Journal Article
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: The Journal of Physical Chemistry C
Publisher: American Chemical Society
ISSN: 1932-7447
Official Date: 28 June 2018
Dates:
DateEvent
28 June 2018Published
28 June 2018Accepted
Volume: 122
Number: 30
Page Range: pp. 17552-17558
DOI: 10.1021/acs.jpcc.8b05695
Status: Peer Reviewed
Publication Status: Published
Reuse Statement (publisher, data, author rights): This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.jpcc.8b05695
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 10 August 2018
Date of first compliant Open Access: 28 June 2019

Request changes or add full text files to a record

Repository staff actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics

twitter

Email us: wrap@warwick.ac.uk
Contact Details
About Us