Optical characterizations of Carmine micro-stain thin films and photovoltaic properties of Carbon/Carmine-μ/p-Si/Al for analog–digital conversion applications

This experimental work introduces the fast processing of Carmine µ-stain/p-Si(111) Organic/Inorganic interfaces for light-harvesting and photovoltaic applications. The optical constants of Spin-coated Carmine µ-stain films were investigated using various film thicknesses (from 95 to 237 nm). The characteristic transition of the fabricated films is indirect, with EgOp~1.68 eV and fundamental bandgap ~ 3.67 eV. The fabricated films depicted a dispersive disposal trend with a conservative peak position and distribution. The estimated rate d[Tanδ]/d[hυ] for the dissipation factor reveals two triggering values in the visible region at hυ ~ 1.94 and 5.1 eV, with transparency ~ 50% in the range visible and IR-regions with high absorption coefficient. The spin-coated Carmine µ-stain films showed excellent experimental Carmine µ-stain films/p-Si(111) organic/Inorganic interface with a stable repeatability characteristic rectification ratio and ideality factor ~ 1428 and 3.7, respectively. In application, the fabricated Carmine µ-stain/p-Si(111)/Al devices are coated with a small conductive carbon past (as a collecting electrode) to examine the current–voltage behaviors in dark and illuminating environments. The fabricated devices revealed a photovoltaic effect with an open voltage of 0.1 to 0.32 V. The monitored I_SC is increased from 24 nA to 0.1 µA as the incident radiant varies from 10 to 30 mW/cm², respectively. The extracted microelectronic parameters, such as the SNR and LDR photodetector ratios, revealed a linear stable response with the applied reversed voltage.