Photoabsorbers with Hybrid Organic-Inorganic Structures for Optoelectronics and Solar Cells

Hybrid organic-inorganic structures are explored here for their use in optoelectronics and toward solar cell platforms. In the first study, graphene quantum dots (GQDs) are studied once they are integrated with inorganic two-dimensional (2D) MoS2. This hybrid structure displays exciting optoelectronics properties, exceeding the limitations of the bare MoS2 photodetectors, where the GQDs enhance optical absorption properties into the near-UV regime. Raman and photoluminescence (PL) spectroscopy analysis, along with atomic forcemicroscopy, were used to characterize the GQDs and MoS2 films. In the second study, hybrid structures comprising of organo-halide perovskites are analysed, where similar such optoelectronic properties were examined. Here, solution-processed 2D (CH3(CH2)(3)NH3)(2)(CH3NH3)(n-1)PbnI3n+1 (n = 4) organo-halide layered perovskites were inspected in terms of their photoluminescence behaviour and optical absorption spectra, and the photo response of spin-coated films was studied as a function of incoming laserwavelength of the optical excitation toward future solar cell platforms.