Optical and structural properties of d0 ion-doped silicate glasses for photovoltaic applications

ALLSOPP, Benjamin, CHRISTOPOULOU, Georgina, BROOKFIELD, Adam, FORDER, Sue and BINGHAM, Paul (2018). Optical and structural properties of d0 ion-doped silicate glasses for photovoltaic applications. Physics and Chemistry of Glasses : European Journal of Glass Science and Technology Part B, 59 (4), 193-202.

[img]
Preview
PDF
Bingham Optical and structural properties of d0 ion-doped silicate glasses.pdf - Accepted Version
All rights reserved.

Download (1MB) | Preview

Abstract

Optical and structural properties of float-type soda lime silicate (SLS) glasses doped with 0.2 mol % TiO2, ZrO2, HfO2, Nb2O5, Ta2O5, MoO3 or WO3 have been studied. Under UV excitation all d0 doped glasses exhibit broadband visible emission centred between 19,000 cm-1 and 25,000 cm-1 (400nm – 525nm) due to a transition from the 2p orbital of O2- to the metal d0 orbital. Dopant additions lead to shifts in the UV absorption edge to lower energies, with doped glasses having an absorption edge 2,000 cm-1 (~20nm), and in the case of MoO3, 4,000 cm-1 (~40nm), lower than the corresponding undoped glass. Combined UV-Vis absorption and X-band EPR spectroscopy analyses confirm that dopant cations occur in the studied glasses in the expected oxidation states of Ti4+, Zr4+, Hf4+, Nb5+, Ta5+, Mo6+ and W6+, although very low levels of Mo5+ are also observed, as demonstrated by the EPR resonance at g=1.92 (3.7T). The incorporation of the studied dopants into SLS glasses may find applications as cover glasses in photovoltaic (PV) applications, providing UV protection of polymers and solar cell materials in PV units whilst enhancing solar cell efficiency through downconversion / fluorescence of absorbed UV photons with re-emission as visible photons, available for absorption and conversion by the solar cell material.

Item Type: Article
Research Institute, Centre or Group - Does NOT include content added after October 2018: Materials and Engineering Research Institute > Polymers Nanocomposites and Modelling Research Centre
Departments - Does NOT include content added after October 2018: Faculty of Science, Technology and Arts > Department of Engineering and Mathematics
Identification Number: https://doi.org/10.13036/17533562.59.4.003
Depositing User: Paul Bingham
Date Deposited: 09 May 2018 11:15
Last Modified: 10 Jan 2019 10:49
URI: http://shura.shu.ac.uk/id/eprint/21052

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics