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18 September 2018 From printed organic photodiodes to printed image sensors (Conference Presentation)
Uli Lemmer, Noah Strobel, Jonathan Lehr, Ralph Eckstein, Gerardo Hernandez-Sosa, Tobias Rödlmeier
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Proceedings Volume 10738, Organic and Hybrid Sensors and Bioelectronics XI; 1073806 (2018) https://doi.org/10.1117/12.2321689
Event: SPIE Organic Photonics + Electronics, 2018, San Diego, California, United States
Abstract
Organic photodiodes (OPDs) have in recent years reached a level of performance comparable to their inorganic counterparts. Using additives like PMMA, we were able to tune the transparency and viscosity of a P3HT:PCBM photoactive blend while at the same time achieving a two-fold enhancement of the detection speed. Furthermore, we have developed approaches towards the digital realization of image sensors using aerosol jet printing and a direct-printed patterning technique utilizing the self organization of functional inks. These techniques allow for a reproducible deposition of multilayer devices with high registration accuracies and feature sizes down to a few microns. We present a comprehensive electrical and optical characterization of these printed image sensors. The devices exhibit specific detectivities of >1E12 Jones over a broad wavelength range (400-750 nm) and maximum responsivities of 0.25 A/W. An entirely printed matrix image sensor composing of 256 individual pixels with an individual active area of ≈250 μm × 300 μm was fabricated.
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Uli Lemmer, Noah Strobel, Jonathan Lehr, Ralph Eckstein, Gerardo Hernandez-Sosa, and Tobias Rödlmeier "From printed organic photodiodes to printed image sensors (Conference Presentation)", Proc. SPIE 10738, Organic and Hybrid Sensors and Bioelectronics XI, 1073806 (18 September 2018); https://doi.org/10.1117/12.2321689
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KEYWORDS
Image sensors
Photodiodes
Aerosols
Image registration
Optical lithography
Polymethylmethacrylate
Printing
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