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

Year: 2025

Type: 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.

Source: Conference record of the IEEE Photovoltaic Specialists Conference

DOI: 10.1109/pvsc59419.2025.11132498

Authors: Samuel E. Machin, Kieran M. Curson, Xiaolei Liu, John M. Walls, Stuart Robertson, Zhaoxia Zhou, Joshua Brown, Robert Morrissey, Matthew O. Reese, Eric Colegrove

Institutions: Loughborough University, National Laboratory of the Rockies

Language: English

Topic: Chalcogenide Semiconductor Thin Films

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

OpenAlex ID: W4413822907

FWCI:

Cites: 8

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Related to: 10