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Title: | Stacked Dual-Wavelength Near-Infrared Organic Photodetectors | Authors: | Wang, Yazhong SIEGMUND, Bernhard Tang, Zheng Ma, Zaifei Kublitski, Jonas Xing, Shen Nikolis, Vasileios C. Ullbrich, Sascha Li, Yungui Benduhn, Johannes SPOLTORE, Donato VANDEWAL, Koen Leo, Karl |
Issue Date: | 2021 | Publisher: | WILEY-V C H VERLAG GMBH | Source: | Advanced Optical Materials, 9 (6), (Art N° 2001784) | Abstract: | Organic near-infrared (NIR) detectors have potential applications in biomedicine, agriculture, and manufacturing industries to identify and quantify materials contactless, in real time and at a low cost. Recently, tunable narrow-band NIR sensors based on charge-transfer state absorption of bulk-heterojunctions embedded into Fabry-Perot micro-cavities have been demonstrated. In this work, this type of sensor is further miniaturized by stacking two sub-cavities on top of each other. The resulting three-terminal device detects and distinguishes photons at two specific wavelengths. By varying the thickness of each sub-cavity, the detection ranges of the two sub-sensors are tuned independently between 790 and 1180, and 1020 and 1435 nm, respectively, with full-width-at-half-maxima ranging between 35 and 61 nm. Transfer matrix modeling is employed to select and optimize device architectures with a suppressed cross-talk in the coupled resonator system formed by the sub-cavities, and thus to allow for two distinct resonances. These stacked photodetectors pave the way for highly integrated, bi-signal spectroscopy tunable over a broad NIR range. To demonstrate the application potential, the stacked dual sensor is used to determine the ethanol concentration in a water solution. | Notes: | Wang, YZ (corresponding author), Tech Univ Dresden, Dresden Integrated Ctr Appl Phys & Photon Mat IAP, Nothnitzer Str 61, D-01187 Dresden, Germany.; Wang, YZ (corresponding author), Tech Univ Dresden, Inst Appl Phys, Nothnitzer Str 61, D-01187 Dresden, Germany.; Vandewal, K (corresponding author), Hasselt Univ, Inst Mat Res IMO IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. yazhong.wang@tu-dresden.de; koen.vandewal@uhasselt.be |
Other: | Wang, YZ (corresponding author), Tech Univ Dresden, Dresden Integrated Ctr Appl Phys & Photon Mat IAP, Nothnitzer Str 61, D-01187 Dresden, Germany. Tech Univ Dresden, Inst Appl Phys, Nothnitzer Str 61, D-01187 Dresden, Germany. Vandewal, K (corresponding author), Hasselt Univ, Inst Mat Res IMO IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. yazhong.wang@tu-dresden.de; koen.vandewal@uhasselt.be | Keywords: | dual wavelength;micro‐cavities;near infrared;organic photodetectors;tunable spectra | Document URI: | http://hdl.handle.net/1942/33246 | ISSN: | 2195-1071 | e-ISSN: | 2195-1071 | DOI: | 10.1002/adom.202001784 | ISI #: | WOS:000602558000001 | Rights: | 2020 The Authors. Advanced Optical Materials published by WileyVCH GmbH. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2022 |
Appears in Collections: | Research publications |
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Advanced Optical Materials - 2021 - Wang - Stacked Dual‐Wavelength Near‐Infrared Organic Photodetectors.pdf | Published version | 1.19 MB | Adobe PDF | View/Open |
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