Professor Buddhika Mendis' Outputs (6)

On the principle of reciprocity in inelastic electron scattering (2024)
Journal Article
Mendis, B. G. (2024). On the principle of reciprocity in inelastic electron scattering. Acta Crystallographica Section A: Foundations and Advances, 80(6), 457-459. https://doi.org/10.1107/s2053273324009550

In electron microscopy the principle of reciprocity is often used to imply time reversal symmetry. While this is true for elastic scattering, its applicability to inelastic scattering is less well established. From the second law of thermodynamics, t... Read More about On the principle of reciprocity in inelastic electron scattering.

La₂O₂MQ₂ phases: stability and synthetic challenges (2024)
Journal Article
Hebberd, G. R., Mendis, B., Bowen, L., Clark, S. J., & Mccabe, E. E. (2024). La₂O₂MQ₂ phases: stability and synthetic challenges. Solid State Sciences, 157, Article 107719. https://doi.org/10.1016/j.solidstatesciences.2024.107719

Oxychalcogenides containing transition metal or p block cations have potential for thermoelectric, photocatalytic and magnetic applications but the synthetic pathways to these quaternary phases are not fully understood. This presents a challenge to t... Read More about La₂O₂MQ₂ phases: stability and synthetic challenges.

Se Inter-Diffusion Limits Absorber Layer Grain Growth in CdSe - CdTe Photovoltaics (2024)
Journal Article
Altamimi, T. F. S., Leaver, J. F., Durose, K., Major, J. D., & Mendis, B. G. (2024). Se Inter-Diffusion Limits Absorber Layer Grain Growth in CdSe - CdTe Photovoltaics. PRX Energy, 3(2), Article 023002. https://doi.org/10.1103/prxenergy.3.023002

Diffusion of Se from the CdSe window layer into the CdTe absorber improves the short circuit current density by narrowing the band gap and increasing the carrier lifetime. Thicker CdSe layers, however, show a dramatic loss in photocurrent collection... Read More about Se Inter-Diffusion Limits Absorber Layer Grain Growth in CdSe - CdTe Photovoltaics.

Grain-Boundary Structural Relaxation in Sb2Se3 Thin-Film Photovoltaics (2024)
Journal Article
Lomas-Zapata, R., McKenna, K., Ramasse, Q., Williams, R., Phillips, L., Durose, K., Major, J., & Mendis, B. (2024). Grain-Boundary Structural Relaxation in Sb2Se3 Thin-Film Photovoltaics. PRX Energy, 3(1), Article 013006. https://doi.org/10.1103/prxenergy.3.013006

Grain boundaries play an important role in the efficiency of thin-film photovoltaics, where the absorber layer is invariably polycrystalline. Density-functional-theory simulations have previously identified a “self-healing” mechanism in Sb2Se3 that p... Read More about Grain-Boundary Structural Relaxation in Sb2Se3 Thin-Film Photovoltaics.

Modelling dynamical 3D electron diffraction intensities. I. A scattering cluster algorithm (2024)
Journal Article
Mendis, B. (2024). Modelling dynamical 3D electron diffraction intensities. I. A scattering cluster algorithm. Acta Crystallographica Section A: Foundations and Advances, 80(2), 167-177. https://doi.org/10.1107/s2053273323010689

Three‐dimensional electron diffraction (3D‐ED) is a powerful technique for crystallographic characterization of nanometre‐sized crystals that are too small for X‐ray diffraction. For accurate crystal structure refinement, however, it is important tha... Read More about Modelling dynamical 3D electron diffraction intensities. I. A scattering cluster algorithm.

Modelling dynamical 3D electron diffraction intensities. II. The role of inelastic scattering (2024)
Journal Article
Mendis, B. (2024). Modelling dynamical 3D electron diffraction intensities. II. The role of inelastic scattering. Acta Crystallographica Section A: Foundations and Advances, 80(2), 178-188. https://doi.org/10.1107/s2053273323010690

The strong interaction of high‐energy electrons with a crystal results in both dynamical elastic scattering and inelastic events, particularly phonon and plasmon excitation, which have relatively large cross sections. For accurate crystal structure r... Read More about Modelling dynamical 3D electron diffraction intensities. II. The role of inelastic scattering.