Photomultiplication-Type All-Polymer Photodetectors with a Signal-to-Noise Ratio over 118,800

Haolan Zhang; Xingchao Zhao; Ruifeng Gong; Kaixuan Yang; Nayoung Kim; Xiaoling Ma; Lifang Lu; Han Young Woo; Fujun Zhang

doi:10.1021/acsaelm.4c01715

Photomultiplication-Type All-Polymer Photodetectors with a Signal-to-Noise Ratio over 118,800

Haolan Zhang, Xingchao Zhao, Ruifeng Gong, Kaixuan Yang, Nayoung Kim, Xiaoling Ma, Lifang Lu, Han Young Woo, Fujun Zhang

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Photomultiplication (PM) type all-polymer photodetectors (PM-APPDs) were fabricated by using polymer donor P3HT and polymer acceptor PY-IT as the photoactive layers. An optimal weight ratio of P3HT to PY-IT is approximately 100:4 to achieve an efficient hole transport channel and numerous isolated electron traps formed by P3HT/PY-IT/P3HT. These active layers exhibit hole-only transport characteristics, resulting in a low dark-current density (J_D) of PM-APPDs. And J_D of the PM-APPDs can be further suppressed by employing a triphenylamine-based cationic conjugated polyelectrolyte, TPAFA-7Br, as a hole transport layer (HTL) instead of a PEDOT:PSS layer. The optimal PM-APPDs with TPAFA-7Br as HTL display a rather low J_D of 1.8 × 10^-9 A·cm^-2 under −10 V bias, which is significantly lower than the 2.1 × 10^-6 A·cm^-2 for PM-APPDs with PEDOT:PSS as HTL under the same bias. Additionally, the optimal PM-APPDs display an external quantum efficiency (EQE) of 1760% and a specific detectivity (D*_shot) of 0.9 × 10¹⁴ Jones at 630 nm under 0.6 mW·cm^-2 white light illumination. The resulting linear dynamic range of the optimal PM-APPDs is 122 dB, exhibiting a significant improvement compared to 106 dB for PM-APPDs with PEDOT:PSS as HTL. The signal-to-noise ratio of the optimized PM-APPDs reaches 118,800 under −10 V bias and 0.6 mW·cm^-2 white light illumination, which should be among the best values for organic photodetectors without an additional current amplifier.

Original language	English
Pages (from-to)	8481-8487
Number of pages	7
Journal	ACS Applied Electronic Materials
Volume	6
Issue number	11
DOIs	https://doi.org/10.1021/acsaelm.4c01715
Publication status	Published - 2024 Nov 26

Bibliographical note

Publisher Copyright:
© 2024 American Chemical Society.

Keywords

hole transport layer
photomultiplication
polymer photodetectors
signal-to-noise ratio
tunneling injection

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Materials Chemistry
Electrochemistry

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10.1021/acsaelm.4c01715

Cite this

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title = "Photomultiplication-Type All-Polymer Photodetectors with a Signal-to-Noise Ratio over 118,800",

abstract = "Photomultiplication (PM) type all-polymer photodetectors (PM-APPDs) were fabricated by using polymer donor P3HT and polymer acceptor PY-IT as the photoactive layers. An optimal weight ratio of P3HT to PY-IT is approximately 100:4 to achieve an efficient hole transport channel and numerous isolated electron traps formed by P3HT/PY-IT/P3HT. These active layers exhibit hole-only transport characteristics, resulting in a low dark-current density (JD) of PM-APPDs. And JD of the PM-APPDs can be further suppressed by employing a triphenylamine-based cationic conjugated polyelectrolyte, TPAFA-7Br, as a hole transport layer (HTL) instead of a PEDOT:PSS layer. The optimal PM-APPDs with TPAFA-7Br as HTL display a rather low JD of 1.8 × 10-9 A·cm-2 under −10 V bias, which is significantly lower than the 2.1 × 10-6 A·cm-2 for PM-APPDs with PEDOT:PSS as HTL under the same bias. Additionally, the optimal PM-APPDs display an external quantum efficiency (EQE) of 1760% and a specific detectivity (D*shot) of 0.9 × 1014 Jones at 630 nm under 0.6 mW·cm-2 white light illumination. The resulting linear dynamic range of the optimal PM-APPDs is 122 dB, exhibiting a significant improvement compared to 106 dB for PM-APPDs with PEDOT:PSS as HTL. The signal-to-noise ratio of the optimized PM-APPDs reaches 118,800 under −10 V bias and 0.6 mW·cm-2 white light illumination, which should be among the best values for organic photodetectors without an additional current amplifier.",

keywords = "hole transport layer, photomultiplication, polymer photodetectors, signal-to-noise ratio, tunneling injection",

author = "Haolan Zhang and Xingchao Zhao and Ruifeng Gong and Kaixuan Yang and Nayoung Kim and Xiaoling Ma and Lifang Lu and Woo, {Han Young} and Fujun Zhang",

note = "Publisher Copyright: {\textcopyright} 2024 American Chemical Society.",

year = "2024",

month = nov,

day = "26",

doi = "10.1021/acsaelm.4c01715",

language = "English",

volume = "6",

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journal = "ACS Applied Electronic Materials",

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T1 - Photomultiplication-Type All-Polymer Photodetectors with a Signal-to-Noise Ratio over 118,800

AU - Zhang, Haolan

AU - Zhao, Xingchao

AU - Gong, Ruifeng

AU - Yang, Kaixuan

AU - Kim, Nayoung

AU - Ma, Xiaoling

AU - Lu, Lifang

AU - Woo, Han Young

AU - Zhang, Fujun

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Y1 - 2024/11/26

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AB - Photomultiplication (PM) type all-polymer photodetectors (PM-APPDs) were fabricated by using polymer donor P3HT and polymer acceptor PY-IT as the photoactive layers. An optimal weight ratio of P3HT to PY-IT is approximately 100:4 to achieve an efficient hole transport channel and numerous isolated electron traps formed by P3HT/PY-IT/P3HT. These active layers exhibit hole-only transport characteristics, resulting in a low dark-current density (JD) of PM-APPDs. And JD of the PM-APPDs can be further suppressed by employing a triphenylamine-based cationic conjugated polyelectrolyte, TPAFA-7Br, as a hole transport layer (HTL) instead of a PEDOT:PSS layer. The optimal PM-APPDs with TPAFA-7Br as HTL display a rather low JD of 1.8 × 10-9 A·cm-2 under −10 V bias, which is significantly lower than the 2.1 × 10-6 A·cm-2 for PM-APPDs with PEDOT:PSS as HTL under the same bias. Additionally, the optimal PM-APPDs display an external quantum efficiency (EQE) of 1760% and a specific detectivity (D*shot) of 0.9 × 1014 Jones at 630 nm under 0.6 mW·cm-2 white light illumination. The resulting linear dynamic range of the optimal PM-APPDs is 122 dB, exhibiting a significant improvement compared to 106 dB for PM-APPDs with PEDOT:PSS as HTL. The signal-to-noise ratio of the optimized PM-APPDs reaches 118,800 under −10 V bias and 0.6 mW·cm-2 white light illumination, which should be among the best values for organic photodetectors without an additional current amplifier.

KW - hole transport layer

KW - photomultiplication

KW - polymer photodetectors

KW - signal-to-noise ratio

KW - tunneling injection

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DO - 10.1021/acsaelm.4c01715

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ER -

Photomultiplication-Type All-Polymer Photodetectors with a Signal-to-Noise Ratio over 118,800

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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