Abstract
Cellulose nanopaper (CNP) has attracted much interest during the last decade as a new fascinating renewable and biodegradable substrate for printed electronics and solar cells. Its outstanding optical and mechanical properties make CNP the ideal substrate for the preparation of photovoltaic devices, since its high transparency and haze favour the absorption of light from the active layer of the solar cell. However, some advances need to be done in the direction of increasing CNP stability in humid environment without compromising its remarkable advantages. This review critically points at these aspects, presenting an overview of state-of-art solutions to enhance nanopaper stability in a humid environment.
Highlights
The compelling need for alternative and renewable energies is, nowadays, meeting the necessity to produce cheap and affordable devices, able to convert light into electrical energy, while being benign for the environment
Cellulose represents the ideal candidate: it is a well-known, abundant, cheap, and affordable biomaterial derived from plants, whose existence is known to us from 1838 [1]
Its hydrophilic character poses some challenges mainly pertinent to its shape stability and resistance to humidity. This is an issue that present research is currently facing, and this review aims at giving a state-of-the-art on the chemical approaches that have been adopted so far to improve Cellulose nanopaper (CNP) resistance to humid environment
Summary
The compelling need for alternative and renewable energies is, nowadays, meeting the necessity to produce cheap and affordable devices, able to convert light into electrical energy, while being benign for the environment For this reason, considerable efforts must be put in the direction of enabling reliable, efficient, and cheap smart devices deposited on biodegradable and renewable biomaterials. Even after surface modification, standard paper still lacks the property of transparency that would greatly widen its applications, making it a perfect substrate for devices such as solar cells and light-emitting diodes This justifies the present efforts to attain transparent paper, with the aim to access cheaper and more sustainable substrates for electronic devices than poly(ethylene terephthalate) (PET) or poly(ethylene naphthalate) (PEN). Cellulose Nanopaper (CNP): Properties and Potentialities as Substrate for Photoconverting Devices
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