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Title: | Intrinsic Detectivity Limits of Organic Near‐Infrared Photodetectors | Authors: | GIELEN, Sam Kaiser, Christina VERSTRAETEN, Frederik Kublitski, Jonas Benduhn, Johannes SPOLTORE, Donato VERSTAPPEN, Pieter MAES, Wouter Meredith, Paul Armin, Ardalan VANDEWAL, Koen |
Issue Date: | 2020 | Publisher: | WILEY-V C H VERLAG GMBH | Source: | Advanced materials (Weinheim. Print), 32 (47) (Art N° 2003818) | Abstract: | Organic photodetectors (OPDs) with a performance comparable to that of conventional inorganic ones have recently been demonstrated for the visible regime. However, near-infrared photodetection has proven to be challenging and, to date, the true potential of organic semiconductors in this spectral range (800-2500 nm) remains largely unexplored. In this work, it is shown that the main factor limiting the specific detectivity (D*) is non-radiative recombination, which is also known to be the main contributor to open-circuit voltage losses. The relation between open-circuit voltage, dark current, and noise current is demonstrated using four bulk-heterojunction devices based on narrow-gap donor polymers. Their maximum achievableD* is calculated alongside a large set of devices to demonstrate an intrinsic upper limit ofD* as a function of the optical gap. It is concluded that OPDs have the potential to be a useful technology up to 2000 nm, given that high external quantum efficiencies can be maintained at these low photon energies. | Notes: | Vandewal, K (corresponding author), UHasselt Hasselt Univ, Inst Mat Res IMO, Agoralaan 1,Bldg D, B-3590 Diepenbeek, Belgium.; Vandewal, K (corresponding author), IMEC, Associated Lab IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium.; Armin, A (corresponding author), Swansea Univ, Dept Phys, Singleton Pk, Swansea SA2 8PP, W Glam, Wales. ardalan.armin@swansea.ac.uk; koen.vandewal@uhasselt.be |
Other: | Vandewal, K (corresponding author), UHasselt Hasselt Univ, Inst Mat Res IMO, Agoralaan 1,Bldg D, B-3590 Diepenbeek, Belgium ; IMEC, Associated Lab IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. Armin, A (corresponding author), Swansea Univ, Dept Phys, Singleton Pk, Swansea SA2 8PP, W Glam, Wales. ardalan.armin@swansea.ac.uk; koen.vandewal@uhasselt.be | Keywords: | near-infrared;non-radiative losses;organics;photodetectors;specific detectivity | Document URI: | http://hdl.handle.net/1942/32820 | ISSN: | 0935-9648 | e-ISSN: | 1521-4095 | DOI: | 10.1002/adma.202003818 | ISI #: | WOS:000579379700001 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2021 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
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Revised manuscript Gielen et al_AdvMater2020 (1).pdf | Peer-reviewed author version | 3.64 MB | Adobe PDF | View/Open |
Advanced Materials - 2020 - Gielen - Intrinsic Detectivity Limits of Organic Near‐Infrared Photodetectors.pdf Restricted Access | Published version | 1.19 MB | Adobe PDF | View/Open Request a copy |
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