Reflectance oximeters based on organic photodiode (OPD) arrays offer the potential to map blood pulsation and oxygenation via photoplethysmography (PPG) over a large area and beyond the traditional sensing locations. Here, an organic reflectance PPG array based on 16 × 16 OPD pixels is developed. The individual pixels exhibit near‐infrared sensitivity up to ≈950 nm and low dark current density in the order of 10⁻⁶ mA cm⁻². This results in high‐quality PPG signals. Analysis of the full PPG waveform yields insight on the artery stiffness and the quality of blood circulation, demonstrating the potential of these arrays beyond pulse oximetry and heart‐rate calculation.

中文翻译：

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使用具有超低暗电流的近红外有机光电二极管进行高精度光电容积描记术阵列

基于有机光电二极管（OPD）阵列的反射式血氧仪提供了通过光电容积描记法（PPG）在大面积上以及传统传感位置之外绘制血液脉动和氧合的潜力。在这里，开发了基于16×16 OPD像素的有机反射率PPG阵列。各个像素表现出高达≈950nm的近红外灵敏度，并且暗电流密度低，约为10 ^-6 mA cm ^-2。这样可以产生高质量的PPG信号。通过分析完整的PPG波形，可以深入了解动脉僵硬度和血液循环质量，从而证明了这些阵列在脉搏血氧仪和心率计算之外的潜力。