Spray deposition of Polyethylenimine thin films for the fabrication of fully-sprayed organic photodiodes
MetadataShow full item record
In the last years, a big effort has been put into the investigation of the scalability of deposition processes for organic optoelectronics to achieve large-scale and cost-effective fabrication of functional devices. One of the most prominent techniques that promises to obtain an easy-to-scale production is spray-deposition; however, so far, the feasibility of entirely spray-deposited optoelectronic devices has not yet been demonstrated. To fulfill this goal, in this work we investigate the spray-coating of Polyethylenimine (PEI) and the effect of the process parameters on the film characteristics, in terms of thickness, work-function and roughness. The achievement of thin layers of PEI (∼10 nm) with full coverage is the last step towards the realization of lithography-free and vacuum-free organic electronic devices. For the first time, we show the fabrication of fully-sprayed organic photodiodes (OPDs), initially on patterned Indium-Tin Oxide, and subsequently on bare glass. The resulting photodiodes yield peak EQE above 65% and dark currents lower than 10-4 mA/cm at a reverse bias of -4 V. Moreover, both the cathode and anode electrode of the OPDs fabricated with the described process-flow are semi-transparent, granting the simultaneous collection of two different light signals from the top and the bottom side. (C) 2015 Elsevier B.V. All rights reserved.
Showing items related by title, author, creator and subject.
Falco A; Cina L; Scarpa G; Lugli P; Abdellah A (AMER CHEMICAL SOC, 2014)In this study, we demonstrate the feasibility of TCO-free, fully sprayed organic photodiodes on flexible polyethylene terephthalate (PET) substrates. Transparent conducting films of single-wall carbon nanotubes are spray ...
Ultra-short-pulse laser ablation and modification of fully sprayed single walled carbon nanotube networks Spellauge M; Loghin FC; Sotrop J; Domke M; Bobinger M; Abdellah A; Becherer M; Lugli P; Huber HP (PERGAMON-ELSEVIER SCIENCE LTD, 2018)In this study, we report on femtosecond (470 fs) laser pulse ablation and modification of solution processed single-walled carbon nanotube (SWCNT) networks sprayed on oxidized silicon and polyimide substrates. Taking ...
Tedde S; Kern J; Sterzl T; Fürst J; Lugli P; Hayden O (2009)Solution-processed organic diodes based on bulk heterojunctlons are attractive for large area photodetectlon. We report a general approach for fully spray-coated organic photodiodes with outstanding characteristics In ...