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Optoelectronics deals with the design and development of electronic devices including photodetector (PD), solar cells and LEDs for light detection, generation and application for a variety of purposes. It includes X-rays, Gamma rays, Infrared, Ultraviolet and Visible light. In the current work, we developed a self-powered and efficient UV–Visible PD by sensitizing mesoporous TiO 2  powder with a natural sensitizer Ficus Benghalensis (Banyan) and Rubia Cordifolia (Manjishtha). Prominent enhancement of visible light absorption was noted due to sensitizers as compared to pure TiO 2  with the decrease in band gap from 3.13 eV to 3.01 eV. TiO 2  photoanodes fabricated with and without dye loading were characterized using XRD, FESEM and UV–Visible and FTIR spectroscopy and used to fabricate a PD device with an active area of 0. 25 cm 2 . At zero bias, the Banyan-loaded TiO 2  PD (B-TiO 2 ) demonstrates enhanced photo response by nearly three times than Manjishtha-loaded PD (M-TiO 2 ). At zero bias voltage, the PD (B-TiO 2 ) displayed very high photosensitivity (8665), Dark current density (126 nA), Photocurrent density (158 µA), Photoresponsivity (1.88 mA/W), Rise time (0.31S) and Decay time (0.35S), respectively. Therefore, the use of novel dye for electricity generation in this study opens new routes to design future optoelectronics devices.

Natural sensitizers-mesoporous TiO 2 hybrid nanomaterial for future optoelectronic applications