Optoelectronics and Bio Devices on Paper Powered by Solar Cells

Abstract

The employment of printing techniques as cost-effective methods to fabricate low cost, flexible, disposable and sustainable solar cells is intimately dependent on the substrate properties and the adequate electronic devices to be powered by them. Among such devices, there is currently a growing interest in the development of user-oriented and multipurpose systems for intelligent packaging or on-site medical diagnostics, which would greatly benefit from printable solar cells as their energy source for autonomous operation.This chapter first describes and analyzes different types of cellulose-based substrates for flexible and cost effective optoelectronic and bio devices to be powered by printed solar cells. Cellulose is one of the most promising platforms for green recyclable electronics and it is fully compatible with large-scale printing techniques, although some critical requirements must be addressed. Paper substrates exist in many forms. From common office paper, to packaging cardboard used in the food industry, or nanoscale engineered cellulose (e.g. bacterial cellulose). However, it is the structure and content of paper that determines its end use. Secondly, proof-of-concept of optoelectronic and bio devices produced by inkjet printing are described and show the usefulness of solar cells as a power source or as a chemical reaction initiator for sensors.

3D ZnO/Ag Surface-Enhanced Raman Scattering on Disposable and Flexible Cardboard Platforms

“…Several studies have focused their research on paper-based platforms in electronic applications, in order to develop their innovative use as bendable supports, with reliability similar (or even potentially superior) to that of conventional rigid substrates. These paper-based devices are already being used in distinct applications, such as in electronic displays [ 1 ], thin-film transistors [ 2 ] and solar cells [ 3 ], paper batteries [ 4 ], ultra violet (UV) sensors [ 5 ], biomedical applications [ 6 ], and platforms for surface-enhanced Raman scattering (SERS detection) [ 7 , 8 , 9 ], among others.…”

Metal oxide nanostructures for sensor applications

“…Semiconductor metal oxides have been largely employed in electronics and optoelectronics with their incorporation on transistors, circuits, or panel displays, and more recently on printed and paper electronics [102][103][104]. Nevertheless, the sensing technology has evolved over the last years and continues to grow to guarantee human well-being, quality and safety from food to air, but also for environmental protection.…”

Struktur dan Sifat Mekanik Film Bacterial Cellulose dengan Disintegrasi Mekanis

“…Difraktogram grafik XRD dari semua sampel menunjukkan tiga puncak difraksi yaitu 14º, 16º, dan 22º berada di wilayah 10º -40º yang ditetapkan untuk bidang kristalografi selulosa. Masing-masing puncak difraksi berhubungan dengan sudut 2θ difraksi 1ī0, 110, dan 002 [30]. Namun, Puncak difraksi sekitar 16,5º tampak hadir tetapi sangat kecil.…”

“…Semua sampel BCF sebelum dan sesudah perlakukan memiliki puncak difraksi yang khas pada 2θ = 14º dan 22º yang menunjukkan karakteristik struktur selulosa type I. Dimana, selulosa type I adalah konfigurasi paralel di sudut dan pusat sel satuan sedangkan selulosa type II susunan anti paralel [31], [32]. Hasil ini konsisten dengan data yang dipublikasikan sebelumnya [9], [29][30][31]. Difraktogram grafik XRD menunjukkan letak puncak difraksi yang sama dari semua BCF yaitu diantara 22º.…”