Parametric Analysis of Organic LED and Photo-Diode Based Sensor for Heart Rate Detection

Conventional Light emitting diode and photo-diode integration is the best suitable combination for point-of-care diagnostic in the field of sensor applications. However, these approaches based on inorganic devices are not scalable to incorporate multiple bio-marker. As a solution, this work proposes the methodology for bio-medical application using organic LED (OLED) and photo-diode to make a highly efficient, ultra-flexible, and low-cost sensor. In this paper, a green charge generation based OLED and organic photo diode (OPD) are utilized for heart rate measurements. The methodology is basically based on the fluorescence emission where green light having wavelength of 497 nm falls on the blood cells. Furthermore, a different intensity wavelength is sensed by the photodiode. The proposed OLED exhibits current and luminescence parameters of 0.92 A and 8 363.6 cd m⁻², correspondingly. Moreover, the presented OPD demonstrates dark currents and photocurrent of 10.2 and 174.5 nA, subsequently. This proposed technique can be also investigated in terms of other biomedical applications such as oxygen sensor, cancer detection, corona detection etc.