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Title: Laser annealing of thin film CdTe solar cells using a 808 nm diode laser
Authors: Lisco, Fabiana
Goffin, Nicholas J.
Abbas, Ali
Claudio, Gianfranco
Woolley, Elliot
Tyrer, John R.
Walls, Michael
Keywords: Laser annealing
Diode laser
Thin films
Cadmium telluride
Magnesium Chloride
Photovoltaic cell
Morphological analysis
Issue Date: 2018
Publisher: © IEEE
Citation: LISCO, F. ...et al., 2018. Laser annealing of thin film CdTe solar cells using a 808 nm diode laser. Presented at the 2017 IEEE 44th Photovoltaic Specialist Conference, (PVSC 2017), Portland, OR, USA, 5-10th June.
Abstract: © 2017 IEEE. We report on the effect of a new laser annealing treatment for thin film CdTe solar cells using a 808 nm diode laser. As-deposited, laser annealed and MgCl2treated/laser annealed CdTe thin films have been analysed. One part of the work has been focused on understanding the efficacy of the activation treatment by laser annealing. The results show partial chlorine diffusion and associated partial re-crystallisation of the absorber. The second part of this work has been focused on the effect of the treatment on the chemical composition of the CdTe surface. It has been found that the process also contributes to the formation of a Te-rich layer on the surface of the CdTe absorber, which may provide a useful process to produce a back contact. This paper reveals the effect of the laser treatment on the microstructural properties of the CdTe absorber material. The microstructure has been analysed using STEM/EDX, HRTEM and XRD. Further work is required to optimise the process but it has the potential to provide much greater control than current activation methods and also to provide a Te back contact suitable for CdTe solar cells.
Description: Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Version: Accepted for publication
DOI: 10.1109/PVSC.2017.8366657
URI: https://dspace.lboro.ac.uk/2134/33920
Publisher Link: https://doi.org/10.1109/PVSC.2017.8366657
ISBN: 9781509056057
Appears in Collections:Conference Papers and Presentations (Mechanical, Electrical and Manufacturing Engineering)

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