The Effect of Grain Boundary Misorientation Angle on Selenium Diffusion in CdSexTe1-x Solar Cells

Samuel Machin; Kieran Curson; Xiaolei Liu; John Walls; Stuart Robertson; Zhaoxia Zhou; Joshua Brown; Robert Morrissey; Matthew Reese; Eric Colegrove

doi:10.1109/PVSC59419.2025.11132498

The Effect of Grain Boundary Misorientation Angle on Selenium Diffusion in CdSexTe1-x Solar Cells

Samuel Machin
, Kieran Curson
, Xiaolei Liu
, John Walls
, Stuart Robertson
, Zhaoxia Zhou
, Joshua Brown
, Robert Morrissey
, Matthew Reese
, Eric Colegrove

Materials Science

Research output: Contribution to conference › Paper

Abstract

The effect of grain boundary (GB) misorientation on selenium (Se) diffusion and bandgap grading in cadmium telluride (CdTe) devices incorporating a CdSexTe1-x alloy has been investigated using high-resolution cathodoluminescence (CL) and electron backscatter diffraction (EBSD). Using CL, we map the bandgap variations and the Selenium concentration across the absorber. EBSD provides corresponding information on grain boundary orientation from the same cross-section of the device. This correlative analysis reveals that larger grain boundary misorientation angles promote greater Se diffusion, resulting in a lower bandgap (BG) in grains associated with this type of grain boundary.

Original language	American English
Pages	422-424
Number of pages	3
DOIs	https://doi.org/10.1109/PVSC59419.2025.11132498
State	Published - 2025
Event	2025 IEEE 53rd Photovoltaic Specialists Conference (PVSC) - Montreal, Canada Duration: 8 Jun 2025 → 13 Jun 2025

Conference

Conference	2025 IEEE 53rd Photovoltaic Specialists Conference (PVSC)
City	Montreal, Canada
Period	8/06/25 → 13/06/25

NLR Publication Number

NLR/CP-5K00-98960

Keywords

electron backscatter diffraction
grain boundaries
next generation networking
optimization
performance evaluation
photonic band gap
photovoltaic cells
photovoltaic systems
selenium
tellurium

Access to Document

10.1109/PVSC59419.2025.11132498

Cite this

Machin, S., Curson, K., Liu, X., Walls, J., Robertson, S., Zhou, Z., Brown, J., Morrissey, R., Reese, M., & Colegrove, E. (2025). The Effect of Grain Boundary Misorientation Angle on Selenium Diffusion in CdSexTe1-x Solar Cells. 422-424. Paper presented at 2025 IEEE 53rd Photovoltaic Specialists Conference (PVSC), Montreal, Canada. https://doi.org/10.1109/PVSC59419.2025.11132498

@conference{5873a14c10a74320b999763912a663fe,

title = "The Effect of Grain Boundary Misorientation Angle on Selenium Diffusion in CdSexTe1-x Solar Cells",

abstract = "The effect of grain boundary (GB) misorientation on selenium (Se) diffusion and bandgap grading in cadmium telluride (CdTe) devices incorporating a CdSexTe1-x alloy has been investigated using high-resolution cathodoluminescence (CL) and electron backscatter diffraction (EBSD). Using CL, we map the bandgap variations and the Selenium concentration across the absorber. EBSD provides corresponding information on grain boundary orientation from the same cross-section of the device. This correlative analysis reveals that larger grain boundary misorientation angles promote greater Se diffusion, resulting in a lower bandgap (BG) in grains associated with this type of grain boundary.",

keywords = "electron backscatter diffraction, grain boundaries, next generation networking, optimization, performance evaluation, photonic band gap, photovoltaic cells, photovoltaic systems, selenium, tellurium",

author = "Samuel Machin and Kieran Curson and Xiaolei Liu and John Walls and Stuart Robertson and Zhaoxia Zhou and Joshua Brown and Robert Morrissey and Matthew Reese and Eric Colegrove",

year = "2025",

doi = "10.1109/PVSC59419.2025.11132498",

language = "American English",

pages = "422--424",

note = "2025 IEEE 53rd Photovoltaic Specialists Conference (PVSC) ; Conference date: 08-06-2025 Through 13-06-2025",

}

Machin, S, Curson, K, Liu, X, Walls, J, Robertson, S, Zhou, Z, Brown, J, Morrissey, R, Reese, M & Colegrove, E 2025, 'The Effect of Grain Boundary Misorientation Angle on Selenium Diffusion in CdSexTe1-x Solar Cells', Paper presented at 2025 IEEE 53rd Photovoltaic Specialists Conference (PVSC), Montreal, Canada, 8/06/25 - 13/06/25 pp. 422-424. https://doi.org/10.1109/PVSC59419.2025.11132498

TY - CONF

T1 - The Effect of Grain Boundary Misorientation Angle on Selenium Diffusion in CdSexTe1-x Solar Cells

AU - Machin, Samuel

AU - Curson, Kieran

AU - Liu, Xiaolei

AU - Walls, John

AU - Robertson, Stuart

AU - Zhou, Zhaoxia

AU - Brown, Joshua

AU - Morrissey, Robert

AU - Reese, Matthew

AU - Colegrove, Eric

PY - 2025

Y1 - 2025

N2 - The effect of grain boundary (GB) misorientation on selenium (Se) diffusion and bandgap grading in cadmium telluride (CdTe) devices incorporating a CdSexTe1-x alloy has been investigated using high-resolution cathodoluminescence (CL) and electron backscatter diffraction (EBSD). Using CL, we map the bandgap variations and the Selenium concentration across the absorber. EBSD provides corresponding information on grain boundary orientation from the same cross-section of the device. This correlative analysis reveals that larger grain boundary misorientation angles promote greater Se diffusion, resulting in a lower bandgap (BG) in grains associated with this type of grain boundary.

AB - The effect of grain boundary (GB) misorientation on selenium (Se) diffusion and bandgap grading in cadmium telluride (CdTe) devices incorporating a CdSexTe1-x alloy has been investigated using high-resolution cathodoluminescence (CL) and electron backscatter diffraction (EBSD). Using CL, we map the bandgap variations and the Selenium concentration across the absorber. EBSD provides corresponding information on grain boundary orientation from the same cross-section of the device. This correlative analysis reveals that larger grain boundary misorientation angles promote greater Se diffusion, resulting in a lower bandgap (BG) in grains associated with this type of grain boundary.

KW - electron backscatter diffraction

KW - grain boundaries

KW - next generation networking

KW - optimization

KW - performance evaluation

KW - photonic band gap

KW - photovoltaic cells

KW - photovoltaic systems

KW - selenium

KW - tellurium

U2 - 10.1109/PVSC59419.2025.11132498

DO - 10.1109/PVSC59419.2025.11132498

M3 - Paper

SP - 422

EP - 424

T2 - 2025 IEEE 53rd Photovoltaic Specialists Conference (PVSC)

Y2 - 8 June 2025 through 13 June 2025

ER -

The Effect of Grain Boundary Misorientation Angle on Selenium Diffusion in CdSexTe1-x Solar Cells

Abstract

Conference

NLR Publication Number

Keywords

Access to Document

Fingerprint

Cite this