Design of Biomimetic Leaf-type Hierarchical Nanostructure for Enhancing the Solar Energy Harvesting of Ultra-thin Perovskite Solar Cells

Abstract

Ultra-thin perovskite solar cell had the advantages of low cost, high efficiency and flexibility, which had significant potential in application. However, a severe optical loss was often observed in the ultra-thin perovskite solar cell due to the insufficient light absorption. In this study, inspired by the efficient light harvesting of hierarchical structure in leaf, a biomimetic leaf-type hierarchical nanostructure was introduced for designing highly efficient ultra-thin perovskite solar cell. In detail, three layers of hexagonal arrays of silica nanoparticles with different radius constructed the biomimetic leaf-type hierarchical structure. The biomimetic leaf-type hierarchical nanostructure was optimized by finite-difference time-domain method combined with particle swarm optimization algorithm to reduce the light reflection and increase the light absorption of the ultra-thin perovskite solar cell. The results indicated that biomimetic leaf-type hierarchical nanostructure could enhance the light absorption of ultra-thin perovskite solar cell by maximum 39% at the long wavelength. The photocurrent of the perovskite solar cell with biomimetic leaf-type hierarchical nanostructure was 8.4% higher than that of perovskite solar cell without biomimetic

Toughening shape-memory epoxy resins via sacrificial hydrogen bonds

“…Noncovalent interactions are considered to be promising methods to dissipate energy since the process of bond breakage and recombination is reversible without the requirement of external energy. 15,16 Recently, significant breakthroughs have been made in the introduction of noncovalent interactions such as hydrogen bonds, 17,18 metal coordination [19][20][21][22] and host-guest interactions 23 to solve the dilemma of toughening polymers. In 2017, inspired by marine mussel byssi, Filippidi et al 1 introduced iron-catechol coordination bonds in a dry, loosely permanent covalent network, resulting in a load-bearing elastomer with both good extensibility and stiffness.…”

Fast-Response Bioinspired Near-Infrared Light-Driven Soft Robot Based on Two-Stage Deformation

“…can be doped to achieve photothermal conversion, promote thermal conduction, and ultimately expand thermally triggered deformation. Additionally, structural designs such as biomimetic leaf-type hierarchical nanostructures have also been proved to be an effective way to improve light absorption efficiency . But this is still not enough to circumvent the restriction on the twisting of the LCE molecular chains introduced by the surrounding solid space.…”

“…Additionally, structural designs 43 such as biomimetic leaf-type hierarchical nanostructures have also been proved to be an effective way to improve light absorption efficiency. 54 But this is still not enough to circumvent the restriction on the twisting of the LCE molecular chains introduced by the surrounding solid space. Therefore, it remains a formidable challenge to achieve an accurate, fast, efficient, and reversible actuation using LCE-based materials that can exhibit effective light-to-heat conversion to induce To meet these challenges, a liquid crystal elastomer/high elastic form-stable phase change polymer/multiwalled carbon nanotube (LCE/HEPCP/MWCNT, LHM) nanocomposite with two-stage deformation is judiciously designed to fabricate a high-sensitivity photocontrollable soft robot.…”

Optimization Design of a Multilayer Structure for Broadband and Direction-Selective Emissivity

“…Afterward, investigations on the manipulation of radiation characteristic via micro-structures began to raise broad concerns. In recent years, tremendous micro-/nano-structures, including multilayer slabs, [11][12][13][14][15] nanoparticle/nanowire-doped coatings, [16][17][18][19][20] micro-nano humps, holes and rods, [21][22][23][24][25] and their combined photonic crystals, [26][27][28][29][30] have been prepared for spectral-selective emission of a thermal surface.…”