High responsivity photodetector based on MEH-PPV/CsPbBr<sub>3</sub> heterojunction

Fu, Zhendong; Wang, Fuguo; Liu, Jiangnan; Sun, Wenbao; Zhang, Haiting; Song, Xiaoxian; Yao, Jianquan

doi:10.1088/1361-6528/ad4654

Nanotechnology

2024

DOI: 10.1088/1361-6528/ad4654

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High responsivity photodetector based on MEH-PPV/CsPbBr₃ heterojunction

Zhendong Fu,

Fuguo Wang,

Jiangnan Liu

et al.

Abstract: Perovskite quantum dots (QDs) and organic materials have great research potential

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

Zhang,

Zhao,

Gong

et al. 2024

ACS Appl. Electron. Mater.

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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 × 10 14 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.

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

Zhang,

Zhao,

Gong

et al. 2024

ACS Appl. Electron. Mater.

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High responsivity photodetector based on MEH-PPV/CsPbBr₃ heterojunction

Abstract: Perovskite quantum dots (QDs) and organic materials have great research potential

Cited by 1 publication

References 42 publications

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

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

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High responsivity photodetector based on MEH-PPV/CsPbBr3 heterojunction

Abstract: Perovskite quantum dots (QDs) and organic materials have great research potential&#xD;

Cited by 1 publication

References 42 publications

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

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

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Resources

About

High responsivity photodetector based on MEH-PPV/CsPbBr₃ heterojunction

Abstract: Perovskite quantum dots (QDs) and organic materials have great research potential