Structure and dynamics in photovoltaic metal hydrides
dc.contributor.author | Chea, K | en_AU |
dc.contributor.author | Greaves, TL | en_AU |
dc.contributor.author | Le, T | en_AU |
dc.contributor.author | Rule, KC | en_AU |
dc.contributor.author | Mole, RA | en_AU |
dc.contributor.author | Wang, P | en_AU |
dc.contributor.author | Shrestha, SK | en_AU |
dc.contributor.author | Conibeer, G | en_AU |
dc.contributor.author | Iles, GN | en_AU |
dc.date.accessioned | 2022-08-30T01:28:26Z | en_AU |
dc.date.available | 2022-08-30T01:28:26Z | en_AU |
dc.date.issued | 2018-01-30 | en_AU |
dc.date.statistics | 2021-10-12 | en_AU |
dc.description.abstract | Solar cell technology is an active area of research with the quest to improve the efficiency of solar cells to above the current value of 44%. Hot carrier solar cells are particular types of cells which may enable higher efficiencies to be obtained. However, these are only feasible where there is a sufficiently large band gap in the phonon dispersion of the bulk material to minimise energy loss to thermalisation, thus keeping the electrons ‘hot’. Binary compounds with a large mass difference between the two constituent atoms, and high level of crystal symmetry such as titanium hydride, can have such a gap in their phonon dispersion. Titanium hydride is an interesting photovoltaic material with a broad range of properties, which vary depending on the proportion of hydride present. Theoretical studies show TiH2 has a phonon band gap of 95 meV in the bulk phase, however, experimentally this compound exists as a powder because the hydrogenation process causes large stresses in the lattice which are strong enough to crack the bulk sample. For solar cell absorber materials, a bulk sample is preferred and these can be manufactured by hydrogenating very pure Ti metal. We have previously studied TiH1.65 using X-ray powder diffraction and inelastic neutron scattering and found that while the width of the acoustic and optical phonon bands is different from those of TiH2, it did have a phonon band gap of 65 meV i.e. large enough to block Klemens’ decay. We present here an extension of this work with Fourier Transform Infra-red (FTIR) and Raman spectroscopy, along with X-Ray Diffraction (XRD) data from the photovoltaic materials, TiH2 and ZrH2. | en_AU |
dc.identifier.citation | Chea, K., Greaves, T., Le, T., Rule, K., Mole, R. A., Wang, P., Shrestha, S., Conibeer, G., & Iles, G. N. (2018). Structure and dynamics in photovoltaic metal hydrides. Poster presented to the 42nd Annual Condensed Matter and Materials Meeting Charles Sturt University, Wagga Wagga, NSW 30th January – 2nd February, 2018. (pp. 89). Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2018/Wagga_2018_Conference_Handbook.pdf | en_AU |
dc.identifier.conferenceenddate | 2 February 2018 | en_AU |
dc.identifier.conferencename | 42nd Annual Condensed Matter and Materials Meeting | en_AU |
dc.identifier.conferenceplace | Wagga Wagga, NSW | en_AU |
dc.identifier.conferencestartdate | 30 January 2018 | en_AU |
dc.identifier.pagination | 89 | en_AU |
dc.identifier.uri | https://physics.org.au/wp-content/uploads/cmm/2018/Wagga_2018_Conference_Handbook.pdf | en_AU |
dc.identifier.uri | https://apo.ansto.gov.au/dspace/handle/10238/13668 | en_AU |
dc.language.iso | en | en_AU |
dc.publisher | Australian Institute of Physics | en_AU |
dc.subject | Coherent scattering | en_AU |
dc.subject | Diffraction | en_AU |
dc.subject | Dimensionless numbers | en_AU |
dc.subject | Direct energy converters | en_AU |
dc.subject | Elementary particles | en_AU |
dc.subject | Elements | en_AU |
dc.subject | Equipment | en_AU |
dc.subject | Fermions | en_AU |
dc.subject | Hydrogen compounds | en_AU |
dc.subject | Integral transformations | en_AU |
dc.subject | Laser spectroscopy | en_AU |
dc.subject | Leptons | en_AU |
dc.subject | Mechanics | en_AU |
dc.subject | Metals | en_AU |
dc.subject | Photoelectric cells | en_AU |
dc.subject | Photoelectric effect | en_AU |
dc.subject | Photovoltaic cells | en_AU |
dc.subject | Quasi particles | en_AU |
dc.subject | Scattering | en_AU |
dc.subject | Solar equipment | en_AU |
dc.subject | Spectroscopy | en_AU |
dc.subject | Transformations | en_AU |
dc.subject | Transition elements | en_AU |
dc.title | Structure and dynamics in photovoltaic metal hydrides | en_AU |
dc.type | Conference Poster | en_AU |