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High-Performance Infrared Photodetectors Based on Graphene Nanoribbon Vertical Heterojunctions via Dissociated Double-Walled Carbon Nanotubes.

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Title: High-Performance Infrared Photodetectors Based on Graphene Nanoribbon Vertical Heterojunctions via Dissociated Double-Walled Carbon Nanotubes.
Authors: Li, Ziheng1 (AUTHOR), Sun, Yu1,2 (AUTHOR), Li, Muyang1,3 (AUTHOR), Han, Nan1,4 (AUTHOR), Wang, Zeyuan1,5 (AUTHOR), Fan, Jihui1,6 (AUTHOR), Zhou, Hui1,7 (AUTHOR), Jiang, Xiaoqing2,8 (AUTHOR), Li, Jie1,2 (AUTHOR), Ning, Yafei1,2,3 (AUTHOR), Leifer, Klaus3,4 (AUTHOR), Wang, Mingyang4,5 (AUTHOR), Gao, Ming1,5,6 (AUTHOR), Li, Hu1,3,6 (AUTHOR), Song, Aimin7,8 (AUTHOR)
Source: Nanomaterials (2079-4991). May2026, Vol. 16 Issue 10, p625. 18p.
Subjects: Photodetectors, Heterojunctions, Double walled carbon nanotubes, Nanoribbons, Signal-to-noise ratio, Optoelectronics
Abstract: Graphene nanoribbons (GNRs) inherit the exceptional carrier mobility of graphene while offering tunable bandgaps, making them promising for high-performance optoelectronics. Here, we report a high-performance near-infrared photodetector based on a p-GNR/Al2O3/n-Si vertical heterojunction, where GNR is directly produced by dissociating double-walled carbon nanotubes (DWCNTs). The 10 nm Al2O3 interlayer serves as an effective barrier and passivation layer, suppressing dark current and enhancing interfacial charge separation. Under 1064 nm illumination, the device delivers outstanding performance. At −6 V bias, the responsivity and detectivity reach 159.55 A/W and 2.01 × 1012 Jones, respectively. Notably, under zero-bias self-powered mode, it still achieves a high responsivity of 8.71 A/W, a detectivity of 1.15 × 1013 Jones, and a fast response time of 307.5 μs. These results fully validate the feasibility of GNR-based heterojunctions for high-performance optoelectronic devices and pave the way for their future integration into low-power, high-sensitivity photodetection systems and next-generation optoelectronic integrated circuits. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: High-Performance Infrared Photodetectors Based on Graphene Nanoribbon Vertical Heterojunctions via Dissociated Double-Walled Carbon Nanotubes.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Ziheng%22">Li, Ziheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Yu%22">Sun, Yu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Muyang%22">Li, Muyang</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Han%2C+Nan%22">Han, Nan</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Zeyuan%22">Wang, Zeyuan</searchLink><relatesTo>1,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fan%2C+Jihui%22">Fan, Jihui</searchLink><relatesTo>1,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Hui%22">Zhou, Hui</searchLink><relatesTo>1,7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jiang%2C+Xiaoqing%22">Jiang, Xiaoqing</searchLink><relatesTo>2,8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Jie%22">Li, Jie</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ning%2C+Yafei%22">Ning, Yafei</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Leifer%2C+Klaus%22">Leifer, Klaus</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Mingyang%22">Wang, Mingyang</searchLink><relatesTo>4,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gao%2C+Ming%22">Gao, Ming</searchLink><relatesTo>1,5,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Hu%22">Li, Hu</searchLink><relatesTo>1,3,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Aimin%22">Song, Aimin</searchLink><relatesTo>7,8</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. May2026, Vol. 16 Issue 10, p625. 18p.
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– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Graphene nanoribbons (GNRs) inherit the exceptional carrier mobility of graphene while offering tunable bandgaps, making them promising for high-performance optoelectronics. Here, we report a high-performance near-infrared photodetector based on a p-GNR/Al2O3/n-Si vertical heterojunction, where GNR is directly produced by dissociating double-walled carbon nanotubes (DWCNTs). The 10 nm Al2O3 interlayer serves as an effective barrier and passivation layer, suppressing dark current and enhancing interfacial charge separation. Under 1064 nm illumination, the device delivers outstanding performance. At −6 V bias, the responsivity and detectivity reach 159.55 A/W and 2.01 × 1012 Jones, respectively. Notably, under zero-bias self-powered mode, it still achieves a high responsivity of 8.71 A/W, a detectivity of 1.15 × 1013 Jones, and a fast response time of 307.5 μs. These results fully validate the feasibility of GNR-based heterojunctions for high-performance optoelectronic devices and pave the way for their future integration into low-power, high-sensitivity photodetection systems and next-generation optoelectronic integrated circuits. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano16100625
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        Text: English
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      – SubjectFull: Photodetectors
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      – SubjectFull: Double walled carbon nanotubes
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      – SubjectFull: Signal-to-noise ratio
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      – TitleFull: High-Performance Infrared Photodetectors Based on Graphene Nanoribbon Vertical Heterojunctions via Dissociated Double-Walled Carbon Nanotubes.
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