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Title: | Enhancing sub-bandgap external quantum efficiency by photomultiplication for narrowband organic near-infrared photodetectors | Authors: | Kublitski, J Fischer, A Xing, S Baisinger, L Bittrich, E SPOLTORE, Donato Benduhn, J VANDEWAL, Koen Leo, K |
Issue Date: | 2021 | Publisher: | NATURE RESEARCH | Source: | Nature communications, 12 (1) (Art N° 4259) | Abstract: | Detection of electromagnetic signals for applications such as health, product quality monitoring or astronomy requires highly responsive and wavelength selective devices. Photomultiplication-type organic photodetectors have been shown to achieve high quantum efficiencies mainly in the visible range. Much less research has been focused on realizing near-infrared narrowband devices. Here, we demonstrate fully vacuum-processed narrow- and broadband photomultiplication-type organic photodetectors. Devices are based on enhanced hole injection leading to a maximum external quantum efficiency of almost 2000% at -10V for the broadband device. The photomultiplicative effect is also observed in the charge-transfer state absorption region. By making use of an optical cavity device architecture, we enhance the charge-transfer response and demonstrate a wavelength tunable narrowband photomultiplication-type organic photodetector with external quantum efficiencies superior to those of pin-devices. The presented concept can further improve the performance of photodetectors based on the absorption of charge-transfer states, which were so far limited by the low external quantum efficiency provided by these devices. Photomutiplication-type organic photodetectors (PM-OPDs) are attractive for various next-generation technologies due to their lower cost, higher sensitivity and technological utility. Here, the authors report vacuum-processed narrowband PM-OPDs with enhanced sub-bandgap external quantum efficiency. | Other: | Peer review information Nature Communications thanks Qiuming Yu and the other, anonymous, reviewer(s) for their contribution to the peer review of this work. Peer reviewer reports are available. | Document URI: | http://hdl.handle.net/1942/34775 | e-ISSN: | 2041-1723 | DOI: | 10.1038/s41467-021-24500-2 | ISI #: | 000675912200001 | Datasets of the publication: | https://doi.org/10.1038/s41467-021-24500-2 | Rights: | The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2022 |
Appears in Collections: | Research publications |
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