Near-infrared organic photodiodes
MetadataShow full item record
Organic photodiodes (OPDs) are attractive as solution-processed devices for sensing applications. Industrial and medical sensors often have the requirement to operate in the near-infrared (NIR) spectrum between 650 and 900 nm and are ideally visible-blind. Due to the tailored spectral sensitivity of the organic semiconductors, OPDs are attractive as filter-free solid-state alternative. In addition, the large active areas of the OPDs potentially allow fabricating lens-free light-barrier and reflective sensors. In this paper, we discuss different approaches toward NIR sensitive OPDs with a large active area up to 1 cm applying polymers and small molecules as light absorbers. We demonstrate that with layer stacks optimized to the solution-processed semiconductor properties photodiodes with bulk heterojunctions with a minimum external quantum efficiency peak >40% in the NIR and a rectification ratio of ~10 can be achieved, which match industrial sensing requirements. © 2013 IEEE.
Showing items related by title, author, creator and subject.
Spray deposition of Polyethylenimine thin films for the fabrication of fully-sprayed organic photodiodes Falco A; Zaidi A; Lugli P; Abdellah A (Elsevier, 2015)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 ...
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 ...
Origin of Dark Current and Detailed Description of Organic Photodiode Operation Under Different Illumination Intensities Fallahpour AH; Kienitz S; Lugli P (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2017)Solution-processed organic-based photodetectors (OPDs) provide the opportunity to develop innovative, low cost, and large-area imaging technologies for industrial applications. However, compared to inorganic-based ...