Fabrication and biocompatibility analysis of flexible organic light emitting diodes on poly(lactic acid) substrates: toward the development of greener bio‐electronic devices

The use of biodegradable and biocompatible materials for electronic applications is a research topic great interest, offering the possibility to develop bio-electronic devices reduce e-wastes. In this work, poly(lactic acid) (PLA) films were prepared be employed as substrates in flexible optoelectronic their functionality was tested indium tin oxide-free organic light emitting diodes (OLEDs). PLA fabricated by extrusion characterized terms morphological, optical wettability properties. showed transmittance about 90% visible region surface roughness 12 nm, morphological parameters suitable OLED applications. Different structures on top hybrid technology through solution-based thermal evaporation deposition methods. Good electro-optical properties detected iridium complexes-based devices, with current efficiencies 14 1 cd/A tris[2-phenylpyridinato-C2,N]iridium(III) (Ir[ppy]3) bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium (FIrPic) layer, respectively. biocompatibility assay that encapsulated do not release toxic substances can improved selecting different encapsulating glues. results study show potentiality substrate fabrication opening new routes development advanced systems.