Experimental and theoretical investigations on fullerene (C₆₀) induced compact CH₃NH₃PbI₃ perovskite thin films

Abstract

In the present work, pure and fullerene (C60)-doped methylammonium lead halide (CH3NH3PbI3) perovskite thin films were fabricated on glass substrates by spin coating method at different concentrations of fullerene (C60). The structural, morphological, and optical characteristics of as-prepared thin films were further analysed using experimental and computational methods. The X-ray diffraction studies of the samples confirm that perovskite films have a tetragonal structure with a preferred orientation along the (110) plane. The surface morphology of these films suggests that the incorporation of fullerene (C60) into perovskite films increased the grain size and supports the compact and pinhole-free growth of perovskite films. Also, geometrical, electronic, and optical properties were studied by using the first-principles DFT computational method. Optical properties have been studied experimentally and verified computationally .All the perovskite thin-film samples exhibit a direct band-gap which is suitable for solar cells applications.

Photoactive Properties of Transport Sol-Gel Layers Based on Strontium Titanate for Perovskite Solar Cells

“…In this study, we used a Cl-doped mixed-halide CH 3 NH 3 PbI 3−x Cl x perovskite as an active photoabsorber, which is characterized by low production cost, good stability, and relatively low toxicity [1][2][3][4]. The perovskite layer was deposited by the vacuum coevaporation technique in a VUP-4 chamber using inorganic lead iodide (PbI 2 ) and organic methylammonium chloride (CH 3 NH 3 Cl or MACl) as the raw precursors.…”

“…High-efficiency solid-state sensitized photovoltaic technology is emerging as a promising and cost-effective contender for harvesting solar power as a renewable source of energy. Recently, organic-inorganic hybrid perovskites, CH 3 NH 3 PbX 3 (X is iodine or a mixture of iodine and chlorine), have been intensively pursued as solid-state sensitizers for the traditional dye-sensitized solar cells to planar-heterojunction solar cells [1][2][3]. This class of materials possesses several advantages, such as a direct band gap of approximately 1.55 eV, a high absorption coefficient, high electron mobility, and solution processability.…”

Optical Properties of the Crystalline Silicon-black Silicon-perovskite Tandem Solar Cells

“…In Refs. [9][10][11][12][13][14], various PVK materials and the dependence of the band-gap energy on the refractive index were studied. A simple empirical relationship between the band-gap energy and refractive index for PVK was developed and proposed.…”

Microstructural, Optical, and Work Function Tuning of Fullerene (C60) Modified Zinc Oxide Films for Optoelectronic Devices

“…18 In our earlier work, we modified C 60 into lead iodide to fabricate methyl ammonium lead iodide perovskite films and demonstrated that C 60 modulated perovskite films show improved charge transport, better surface coverage, and optical properties than unmodified perovskite films. 19,20 Perovskite solar cells fabricated on modified lead iodide films show excellent photovoltaic performance than unmodified ones. The insertion of C 60 and their derivatives into the ZnO matrix may also improve their optoelectronic properties due to their excellent charge transport properties, as discussed above.…”