Key Takeaways & Executive Findings
- •• Hand-printing on cellulose paper enables low-cost, scalable fabrication of flexible electronics without toxic solvents or sophisticated equipment. • Paper-based devices achieve competitive performance: photodetectors with responsivity up to 52 mA/W, supercapacitors with energy density ~15.1 mWh/cm2, and pressure sensors with sensitivity ~18.42 kPa−1. • Integration of functional nanomaterials (2D chalcogenides, metal oxides, conductive polymers, carbon structures) on paper enhances device functionality for energy harvesting, storage, and sensing. • This approach aligns with green technology and UN Sustainable Development Goals by reducing e-waste and promoting recyclable, biodegradable electronics.
Abstract
The rapid advancement of modern electronics has led to a surge in solid electronic waste, which poses significant environmental and health challenges. This review focuses on recent developments in paper-based electronic devices fabricated through low-cost, hand-printing techniques, with particular emphasis on their applications in energy harvesting, storage, and sensing. Unlike conventional plastic-based substrates, cellulose paper offers several advantages, including biodegradability, recyclability, and low fabrication cost. By integrating functional nanomaterials such as two-dimensional chalcogenides, metal oxides, conductive polymers, and carbon-based structures onto paper, researchers have achieved high-performance devices such as broadband photodetectors (responsivity up to 52 mA/W), supercapacitors (energy density ~15.1 mWh/cm2), and pressure sensors (sensitivity ~18.42 kPa−1). The hand-printing approach, which eliminates the need for sophisticated equipment and toxic solvents, offers a promising route for scalable, sustainable, and disposable electronics. This review outlines fabrication methods and key performance metrics, and discusses the current challenges and future directions for realizing robust, flexible devices aligned with green technology and the United Nation’s Sustainable Development Goals.
1. Introduction
Electronic solid waste contributes to pollution, resource depletion, and rising landfill demands, posing serious environmental problems worldwide [1]. These problems are exacerbated by the build-up of nonbiodegradable elements from abandoned devices, which cause long-term environmental damage. A key way to address these problems is to use recyclable materials and substrates in energy harvesting and conversion devices. The use of environment-friendly materials, such as cellulose paper (CP), can significantly slow down the increase in solid waste, which has advantages for the environment and economy [2]. The reduced use of nonrecyclable materials not only promotes sustainability but also aids in resource conservation, making it a good sustainable approach for emerging technologies [3].
Paper is an exceptional substrate for flexible and disposable devices, offering several advantages that align with the United Nations Sustainable Development Goals (SDGs) [4]. Paper is economical, biocompatible, environmentally benign, and 100% recyclable, unlike synthetic substitutes such as polyethylene terephthalate, polyimide, and other polymer-based substrates [5–6]. In addition, the elastic and lightweight qualities of paper make it ideal for disposable, wearable, and portable electronics, which advances the SDG industry, innovation, and infrastructure by facilitating the creation of flexible and economically viable technology [2,7]. Paper-based devices promote affordable and clean energy applications, such as photodetectors [8], solar cells [9], supercapacitors (SCs) [10], and paper-based batteries [11].
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Parth Shah, Sanjay A. Bhakhar, Pratik M. Pataniya, C.K. Sumesh (2025). Hand-printed paper-based devices: Toward green flexible electronics and sensing applications. Int. Journal of Minerals, Metallurgy and Materials (矿物冶金与材料学报). https://doi.org/10.1007/s12613-025-3220-9
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Frequently Asked Questions
What are the main advantages of using paper as a substrate for flexible electronics?
Paper offers several advantages including biodegradability, recyclability, low cost, biocompatibility, and lightweight properties, making it an ideal substrate for disposable and wearable electronics, aligning with green technology and sustainability goals.
How does the hand-printing technique contribute to sustainable electronics?
The hand-printing technique eliminates the need for sophisticated equipment and toxic solvents, enabling low-cost, scalable fabrication of paper-based devices, thus reducing environmental impact and promoting sustainable manufacturing.
What performance metrics are highlighted for paper-based photodetectors?
The review highlights photodetectors with responsivity up to 52 mA/W, along with other metrics such as detectivity, external quantum efficiency, and response time, demonstrating competitive performance for sensing applications.
Which nanomaterials are integrated onto paper for enhanced device performance?
Functional nanomaterials such as two-dimensional chalcogenides, metal oxides, conductive polymers, and carbon-based structures are integrated onto paper to achieve high-performance devices for energy harvesting, storage, and sensing.
How do paper-based devices align with the United Nations Sustainable Development Goals?
Paper-based devices promote affordable and clean energy, industry innovation, and infrastructure, and contribute to reducing e-waste, thus supporting several SDGs including those related to responsible consumption and production, and climate action.
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