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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202211714
|2 doi
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|a pubmed24n1178.xml
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|a (DE-627)NLM353481874
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|a (NLM)36842062
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|a DE-627
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|a eng
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|a Zhang, Yingze
|e verfasserin
|4 aut
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|a An n-Type All-Fused-Ring Molecule with Photoresponse to 1000 nm for Highly Sensitive Near-Infrared Photodetector
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|c 2023
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|a Text
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 18.05.2023
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|a Date Revised 18.05.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a Most of all-fused-ring π-conjugated molecules have wide or medium bandgap and show photo response in the visible range. In this work, an all-fused-ring n-type molecule, which exhibits an ultrasmall optical bandgap of 1.22 eV and strong near-infrared (NIR) absorption with an onset absorption wavelength of 1013 nm is reported. The molecule consists of 14 aromatic rings and has electron donor-acceptor characteristics. It exhibits excellent n-type properties with low-lying HOMO/LUMO energy levels of -5.48 eV/-3.95 eV and high electron mobility of 7.0 × 10-4 cm2 V-1 s-1 . Most importantly, its thin film exhibits a low trap density of 5.55 × 1016 cm-3 because of the fixed molecular conformation and consequently low conformation disorder. As a result, organic photodetector (OPD) based on the compound exhibits a remarkably low dark current density (Jd ) of 2.01 × 10-10 A cm-2 at 0 V. The device shows a shot-noise-limited specific detectivity (Dsh *) of exceeding 1013 Jones at 400-1000 nm wavelength region with a peak specific detectivity of 4.65 × 1013 Jones at 880 nm. This performance is among the best reported for self-powered NIR OPDs
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|a Journal Article
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|a all-fused-ring molecules
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|a low trap density
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|a near-infrared absorption
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|a organic photodetectors
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|a Yu, Yingjian
|e verfasserin
|4 aut
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|a Liu, Xinyu
|e verfasserin
|4 aut
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|a Miao, Junhui
|e verfasserin
|4 aut
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|a Han, Yanchun
|e verfasserin
|4 aut
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|a Liu, Jun
|e verfasserin
|4 aut
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|a Wang, Lixiang
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 35(2023), 20 vom: 27. Mai, Seite e2211714
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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|g volume:35
|g year:2023
|g number:20
|g day:27
|g month:05
|g pages:e2211714
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|u http://dx.doi.org/10.1002/adma.202211714
|3 Volltext
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