Covid-19 Detection Using Organic LED and Photodiode-Based Sensor Device

The utilization of fluorescence detection for various biomedical applications such as oximeter sensors, cancer detection, monitoring of protein-DNA interactions, heart stroke detection, etc. has been on the rise which was first introduced by Heyduk and Lee in 1990. The integration of organic light emitting diode and organic photodiode (OPD) is well suited for these kinds of health-care detections. In this article, a methodology is proposed for Covid-19 detection which consists of a highly flexible blue organic LED (OLED), an OPD, and a human saliva sample. An in-depth investigation is being performed on both the OLED and OPD devices to make these devices suitable for the detection of the SARS-COV-2 virus inside human saliva samples. The presented methodology is based on fluorescence detection. Herein, the OLED emits an excitation wavelength of 470 nm and OPD produces two different currents 63.5 and 37.2 mA corresponding to the emission wavelengths of 490 and 525 nm, correspondingly. It is concluded here that if the OPD produces 63.5 mA current, the person is infected by Covid-19 and if it produces 37.2 mA current, the person is healthy. This article also compares the proposed methodology with some other researcher’s work. The proposed OLED-OPD integration may be utilized for other sensing applications such as environmental monitoring, multispectral sensing, optical sensing, IoT devices, etc.