Influence of deposition temperature and hydrogen on sustainable and transfer-free graphene transparent electrode for organic solar cells

Kamel, Michael S.A., Oelgemoeller, Michael, and Jacob, Mohan V. (2024) Influence of deposition temperature and hydrogen on sustainable and transfer-free graphene transparent electrode for organic solar cells. FlatChem, 44. 100627.

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Abstract

The transfer-free graphene transparent conducting electrode (TCE) is a promising alternative to indium tin oxide (ITO) for organic solar cells (OSCs). In the present work, a comprehensive investigation on how deposition temperature and H2 flow rates affect the growth, structural, optical, and electrical properties of graphene produced by RF plasma enhanced chemical vapor deposition using sustainable sources was conducted. Invertedgeometry OSCs with P3HT: PCBM photoactive layer were fabricated on transfer-free graphene TCEs developed under different conditions. Moreover, the coupling of silver nanowires (AgNWs) with different graphene films was studied for hybrid graphene-AgNWs TCEs for OSCs. Devices based on graphene TCEs prepared at low or zero H2 flow have shown better performances than those at high flow of H2. Similarly, graphene TCEs prepared at high temperature (>700 ◦C, on quartz) led to a deteriorated device performance due to the highly increased growth of vertically oriented graphene nanosheets, which dramatically reduced film transmittance and increased surface roughness. The present work provides solid understanding of the growth mechanism of RFPECVD graphene on glass from a sustainable carbon source. More importantly, the sustainable, ecofriendly, cost- and time-effective production of scalable transfer-free graphene TCEs for OSCs is optimized which paves the way towards ITO-free optoelectronics.

Item ID: 82317
Item Type: Article (Research - C1)
ISSN: 2452-2627
Keywords: Single-step graphene electrode, Organic solar cell, Fill factor, Graphene-metal nanowires hybrid electrode, Vertical graphene nanosheets
Copyright Information: © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Funders: James Cook University (JCU)
Projects and Grants: JCU College of Science and Engineering
Date Deposited: 28 Feb 2024 23:50
FoR Codes: 34 CHEMICAL SCIENCES > 3405 Organic chemistry > 340505 Physical organic chemistry @ 20%
40 ENGINEERING > 4016 Materials engineering > 401608 Organic semiconductors @ 80%
SEO Codes: 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280105 Expanding knowledge in the chemical sciences @ 20%
28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering @ 80%
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