Ultraflexible Integrated Organic Electronics for Ultrasensitive Photodetection,Advanced Materials Technologies

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Ultraflexible Integrated Organic Electronics for Ultrasensitive Photodetection
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-11-26 , DOI: 10.1002/admt.202000956
Zhi Jiang _{1,

2} , Kilho Yu ₃ , Haoyang Wang ₂ , Steven Rich ₁ , Tomoyuki Yokota ₂ , Kenjiro Fukuda _{1,

3} , Takao Someya _{1,

2,

3}

Affiliation

Flexible organic photodetectors can form seamless contact with human skin, enabling continuous health monitoring. However, developing flexible photodetectors with high detectivity remains challenging because of the high theoretical dark current of photodetectors using a bulk heterojunction (BHJ) structure. Herein, a simple approach is reported that integrates a field‐effect transistor (FET) and an organic photodiode (OPD) module on the same substrate to achieve an ultralow dark current density (3.0 × 10⁻⁸ mA cm⁻²), ultrahigh detectivity (1.7 × 10¹⁵ Jones), and excellent flexibility. In the integrated sensor, the light‐sensing process occurs in the OPD module, whose signal is used to control the gate of the FET where the current output process occurs, enabling to utilize the light‐sensing properties of the OPD's BHJ structure while bypassing its high dark current. The ultraflexible integrated sensor amplifies the photoplethysmogram signal intensity from the OPD module by a factor of ≈10, thereby confirming its potential as an indoor wearable biosensor.

中文翻译：

用于超灵敏光电检测的超柔性集成有机电子产品

灵活的有机光电探测器可以与人体皮肤无缝接触，从而实现连续的健康监测。然而，由于使用体异质结（BHJ）结构的光电探测器具有很高的理论暗电流，因此开发具有高探测性的柔性光电探测器仍然具有挑战性。本文报道了一种简单的方法，该方法在同一基板上集成了场效应晶体管（FET）和有机光电二极管（OPD）模块，以实现超低暗电流密度（3.0×10 ^-8 mA cm ^-2），超高检测率（1.7×10 ¹⁵琼斯），以及出色的灵活性。在集成传感器中，光感测过程发生在OPD模块中，其信号用于控制发生电流输出过程的FET的栅极，从而能够利用OPD的BHJ结构的光感测特性，而绕过其高暗电流。超柔性集成传感器将来自OPD模块的光电体积描记图信号强度放大了≈10倍，从而确认了其作为室内可穿戴生物传感器的潜力。

更新日期：2021-01-05

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