A comprehensive study on impact of active layer band gap and light illumination on the device performance has been analyzed for the FTO/TiO2/Cs2TiX6/CuSCN/Ag based Perovskite Solar Cell (PSC) using the Solar Cell Capacitance Simulator -1 Dimension (SCAPS-1D) simulator. The present design strategy of the device for optimizing the short circuit current (JSC, mA/cm 2 ), power conversion efficiency (PCE, %) through the absorbing layer band gap variation, and light illumination spectrum has been studied at the optimal thickness, device temperature, and defect density. The value of the different parameters used in the device simulation has been taken from the previous work. From this study, it was revealed that Cs2TiBr6, and Cs2TiF6 absorbing layer based PSC device has recorded maximum PCE at the 1.80 eV band gap, whereas, for the Cs2TiI6, Cs2TiCl6 absorbing layer based PSC device has achieved maximum PCE at the 1.60 eV band gap. On the other side, optimum PCE can be achieved at 400 nm wavelength on the light illumination for the Cs2TiBr6, Cs2TiI6, and Cs2TiF6 absorbing layer based PSC. The Cs2TiCl6 absorbing layer based PSC device has recorded maximum PCE at 450 nm wavelength on the different light illumination.

This paper deals with the Measurement of heart rate and oxygen saturation. The developed real-time pulse monitoring system has a pair of light-emitting diodes (LEDs), one LED has a wavelength in red and other is in infrared region. The light is detected by a photodiode. The LEDs and photodiode are packed in Velcro strip such that it faces the patient's fingertip. The pulse data is calculated by Atmega16 microcontroller unit. Pulse data is read every second and stored in microcontroller. The Measured Parameters were displayed in the LCD Module.

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