journal article·2021-09-01

Thermoconformational Behavior of Cellulose Nanofiber Films as a Device Substrate and Their Superior Flexibility and Durability to Glass

Viktoriya Pakharenko, Sankha Mukherjee, Otavio Augusto Titton Dias, Crystal Wu, Joseph Manion, Chandra Veer Singh, Dwight Seferos, Jimi Tjong, Kristiina Oksman, Mohini Sain

ACS Applied Materials & Interfaces· Volume 13· Issue 34
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Abstract

The design and high-throughput manufacturing of thin renewable energy devices with high structural and atomic configurational stability are crucial for the fabrication of green electronics. Yet, this concept is still in its infancy. In this work, we report the extraordinary durability of thin molecular interlayered organic flexible energy devices based on chemically tuned cellulose nanofiber transparent films that outperform glass by decreasing the substrate weight by 50%. The nanofabricated flexible thin film has an exceptionally low thermal coefficient of expansion of 1.8 ppm/K and a stable atomic configuration under a harsh fabrication condition (over 190 °C for an extended period of 5 h). A flexible optoelectronic device using the same renewable cellulose nanofiber film substrate was found to be functionally operational over a life span of 5 years under an intermittent operating condition. The success of this device's stability opens up an entirely new frontier of applications of flexible electronics.
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Research context

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Organic Electronics and Photovoltaics · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Biocomposites and Biomaterials Processing, Graduate Department of Forestry, John H. Daniels Faculty of Architecture, Landscape and Design, University of Toronto, 33 Willcocks Street, Toronto M5S3E8, Canada

Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto M5S3E4, Canada

Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India

Department of Chemistry, University of Toronto, 80 St. George Street, Toronto M5S3H6, Canada

Department of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto M5S3G8, Canada

Division of Materials Science, Luleå University of Technology, Luleå 97187, Sweden

Funding

Ontario Research Foundation · NSERC

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