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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.

Optoelectronics and Bio Devices on Paper Powered by Solar Cells