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Near Infrared Self-Powered Organic Photodetectors with a Record Responsivity Enabled by Low Trap Density
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-03-16 , DOI: 10.1002/adfm.202301167 Tianhua Liu 1 , Zhenrong Jia 2 , Yu Song 3 , Na Yu 4 , Qijie Lin 1 , Congqi Li 1 , Yixiao Jia 2 , Hao Chen 1 , Song Wang 1 , Yanan Wei 1 , Yuze Lin 2 , Fei Huang 3 , Zheng Tang 4 , Yongfang Li 2 , Lei Meng 2 , Hui Huang 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-03-16 , DOI: 10.1002/adfm.202301167 Tianhua Liu 1 , Zhenrong Jia 2 , Yu Song 3 , Na Yu 4 , Qijie Lin 1 , Congqi Li 1 , Yixiao Jia 2 , Hao Chen 1 , Song Wang 1 , Yanan Wei 1 , Yuze Lin 2 , Fei Huang 3 , Zheng Tang 4 , Yongfang Li 2 , Lei Meng 2 , Hui Huang 1
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High-performance IR organic photodetectors (OPDs) are of great significance for wireless optical communication, light detection and ranging (LiDAR) technology, and wearable electronics. However, high dark current and low responsivity (R) hinder their future commercial application. Herein, fullerene and non-fullerene acceptors-based OPDs are fabricated to understand the relationship between the trap density and photo-responsivity. Impressively, the non-fullerene system (Poly([2,6′-4,8-di(5-ethylhexylthienyl)benzo[1,2-b;3,3-b]dithiophene]{3-fluoro-2[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl}) (PCE10):BTPV-4F-eC9) based OPDs exhibits a record R-value of 0.56 A W−1 at 900 nm in no gain photodiode-type OPDs, which results in a high detectivity over 1013 Jones in 400–1030 nm at room temperature. Mechanistic studies show that the low trap density plays critical role in reducing the trap-assisted recombination and density of thermally generated carriers, thus improving the responsivity and reducing the dark current of the device. These findings provide new insights into the mechanism of high-performance self-powered near-infrared OPDs.
中文翻译：
近红外自供电有机光电探测器，低陷阱密度可实现创纪录的响应度
高性能红外有机光电探测器 (OPD) 对于无线光通信、光探测和测距 (LiDAR) 技术以及可穿戴电子产品具有重要意义。然而，高暗电流和低响应度 ( R ) 阻碍了它们未来的商业应用。在此，制造了基于富勒烯和非富勒烯受体的 OPD，以了解陷阱密度与光响应性之间的关系。令人印象深刻的是，非富勒烯系统（聚（[2,6'-4,8-二（5-乙基己基噻吩基）苯并[1,2-b;3,3-b]二噻吩]{3-fluoro-2[（基于 2-乙基己基)羰基]噻吩并 [3,4-b]噻吩二基}) (PCE10):BTPV-4F-eC9) 的 OPD在无增益光电二极管型 OPD 中在 900 nm 处表现出创纪录的 R 值 0.56 A W -1 , 这导致超过 10 的高检测率13 Jones 在室温下在 400–1030 nm 处。机理研究表明，低陷阱密度在降低热生成载流子的陷阱辅助复合和密度方面起着关键作用，从而提高响应度并降低器件的暗电流。这些发现为高性能自供电近红外 OPD 的机制提供了新的见解。
更新日期：2023-03-16
中文翻译：
近红外自供电有机光电探测器，低陷阱密度可实现创纪录的响应度
高性能红外有机光电探测器 (OPD) 对于无线光通信、光探测和测距 (LiDAR) 技术以及可穿戴电子产品具有重要意义。然而，高暗电流和低响应度 ( R ) 阻碍了它们未来的商业应用。在此，制造了基于富勒烯和非富勒烯受体的 OPD，以了解陷阱密度与光响应性之间的关系。令人印象深刻的是，非富勒烯系统（聚（[2,6'-4,8-二（5-乙基己基噻吩基）苯并[1,2-b;3,3-b]二噻吩]{3-fluoro-2[（基于 2-乙基己基)羰基]噻吩并 [3,4-b]噻吩二基}) (PCE10):BTPV-4F-eC9) 的 OPD在无增益光电二极管型 OPD 中在 900 nm 处表现出创纪录的 R 值 0.56 A W -1 , 这导致超过 10 的高检测率13 Jones 在室温下在 400–1030 nm 处。机理研究表明，低陷阱密度在降低热生成载流子的陷阱辅助复合和密度方面起着关键作用，从而提高响应度并降低器件的暗电流。这些发现为高性能自供电近红外 OPD 的机制提供了新的见解。
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