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Control of Mose2 formation in hydrazine-free solution-processed CIS/CIGS thin film solar cells

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posted on 10.08.2017 by Sona Ulicna, Panagiota Arnou, Alexander Eeles, Mustafa Togay, Lewis Wright, Ali Abbas, Andrei Malkov, Michael Walls, Jake Bowers
This study investigated an approach to control the MoSe2 layer formation at the Mo/CIGS interface of hydrazinefree solution-processed CIGS solar cells. The MoSe2 layer thickness reduction was achieved by deposition of a MoNx back contact barrier layer, which effectively acts as a diffusion barrier against selenium (Se). The resulting Mo/MoNx/Mo multilayer was applied in a CIGS device as the back contact. The electrical performance of this device was compared to our baseline approach with bare Mo as the back contact. The MoSe2 layer formed after selenization was dramatically reduced when the barrier layer was present and the corresponding device exhibited a power conversion efficiency (PCE) of 8.2%. More importantly, the application of the barrier layer as an intermediate layer within the Mo back contact allows for longer, or even multiple selenization steps. A longer or a multiple selenization was shown to improve the absorber grain growth and consequently result in higher PCEs.

Funding

The authors are grateful for funding from the EPSRC (EP/N026438/1) to support this work.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE PVSC-44

Citation

ULICNA, S. ... et al., 2017. Control of Mose2 formation in hydrazine-free solution-processed CIS/CIGS thin film solar cells. Presented at the IEEE Photovoltaic Specialists Conference (PVSC), Washington, D.C., USA, 25th-30th June 2017, pp.186-191.

Publisher

© IEEE

Version

AM (Accepted Manuscript)

Acceptance date

18/06/2017

Publication date

2017

Notes

© 2017 IEEE. 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.

ISBN

9781509056057

Language

en

Location

Washington, D.C.

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