scholarly journals Programmable Invisible Photonic Patterns with Rapid Response Based on Two-Dimensional Colloidal Crystals

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1926
Author(s):  
Naiyu Liu ◽  
Zhikun Zheng ◽  
Dingshan Yu ◽  
Wei Hong ◽  
Hailu Liu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Colloidal Crystals ◽  
Environmentally Friendly ◽  
Rapid Response ◽  
Swelling Kinetics ◽  
Two Dimensional ◽  
Optical Encryption ◽  
Wetting Behavior ◽  
Structural Colors ◽  
Printed Patterns

The development of invisible patterns via programmable patterning can lead to promising applications in optical encryption. This study reports a facile method for building responsive photonic crystal patterns. Commercially printed patterns were used as a mask to induce invisible patterns revealed by wetting. The masked areas exhibit different swelling kinetics, leading to strong structural colors in the masked area and transparent features in the unmasked area. The contrast could disappear through different wetting behavior, providing a unique and reversible wetting feature. This programmable printing is expected to become an environmentally friendly technique for scalable invisible optical anti-counterfeiting technology.

All nanoparticle-based P(MMA–AA)/TiO2 one-dimensional photonic crystal films with tunable structural colors

2017 ◽  
Vol 5 (32) ◽  
pp. 8266-8272 ◽  
Author(s):  
Lin Wang ◽  
Shufen Zhang ◽  
Jodie L. Lutkenhaus ◽  
Lin Chu ◽  
Bingtao Tang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Environmentally Friendly ◽  
One Dimensional ◽  
Dimensional Photonic Crystal ◽  
Structural Colors ◽  
Crystal Films

All nanoparticle-based P(MMA–AA)/TiO2 1DPCs with functional structural colors were fabricated using an aqueous-based and environmentally friendly spin-assisted LbL process.

scholarly journals Dynamic Colloidal Photonic Crystal Hydrogels with Self-Recovery and Injectability

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Yue Ma ◽  
Peiyan He ◽  
Wanli Xie ◽  
Qiang Zhang ◽  
Weiling Yin ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Dynamic Characteristics ◽  
Colloidal Crystals ◽  
Self Healing ◽  
Proof Of Concept ◽  
Ordered Structure ◽  
Physical Damage ◽  
Periodic Nanostructures ◽  
Structural Colors ◽  
New Strategy

Simulation of self-recovery and diversity of natural photonic crystal (PC) structures remain great challenges for artificial PC materials. Motivated by the dynamic characteristics of PC nanostructures, here, we present a new strategy for the design of hydrogel-based artificial PC materials with reversible interactions in the periodic nanostructures. The dynamic PC hydrogels, derived from self-assembled microgel colloidal crystals, were tactfully constructed by reversible crosslinking of adjacent microgels in the ordered structure via phenylboronate covalent chemistry. As proof of concept, three types of dynamic colloidal PC hydrogels with different structural colors were prepared. All the hydrogels showed perfect self-healing ability against physical damage. Moreover, dynamic crosslinking within the microgel crystals enabled shear-thinning injection of the PC hydrogels through a syringe (indicating injectability or printability), followed by rapid recovery of the structural colors. In short, in addition to the great significance in biomimicry of self-healing function of natural PC materials, our work provides a facile strategy for the construction of diversified artificial PC materials for different applications such as chem-/biosensing, counterfeit prevention, optical display, and energy conversion.

Improving efficiency and stability of colorful perovskite solar cells with two-dimensional photonic crystals

Nanoscale ◽  
2020 ◽  
Vol 12 (15) ◽  
pp. 8425-8431 ◽  
Author(s):  
Zhou Liu ◽  
Longlong Wu ◽  
Xiao Wang ◽  
Qiaofei Xu ◽  
Youdi Hu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Photonic Crystal ◽  
Electron Transport ◽  
Photonic Crystals ◽  
Crystal Structures ◽  
Perovskite Solar Cells ◽  
Two Dimensional ◽  
Dimensional Photonic Crystal ◽  
Structural Colors ◽  
Two Dimensional Photonic Crystal

The electron transport layers for perovskite solar cells show two-dimensional photonic crystal structures and vivid structural colors.

scholarly journals Rational Design and Simulation of Two-Dimensional Perovskite Photonic Crystal Absorption Layers Enabling Improved Light Absorption Efficiency for Solar Cells

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2460
Author(s):  
Jian Zou ◽  
Mengnan Liu ◽  
Shuyu Tan ◽  
Zhijie Bi ◽  
Yong Wan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solar Cells ◽  
Photonic Crystal ◽  
Incident Light ◽  
Absorption Efficiency ◽  
Utilization Efficiency ◽  
Photonic Crystal Structure ◽  
Two Dimensional ◽  
Photoelectric Conversion ◽  
Absorption Layer

A two-dimensional perovskite photonic crystal structure of Methylamine lead iodide (CH3NH3PbI3, MAPbI3) is rationally designed as the absorption layer for solar cells. The photonic crystal (PC) structure possesses the distinct “slow light” and band gap effect, leading to the increased absorption efficiency of the absorption layer, and thus the increased photoelectric conversion efficiency of the battery. Simulation results indicate that the best absorption efficiency can be achieved when the scattering element of indium arsenide (InAs) cylinder is arranged in the absorption layer in the form of tetragonal lattice with the height of 0.6 μm, the diameter of 0.24 μm, and the lattice constant of 0.4 μm. In the wide wavelength range of 400–1200 nm, the absorption efficiency can be reached up to 82.5%, which is 70.1% higher than that of the absorption layer without the photonic crystal structure. In addition, the absorption layer with photonic crystal structure has good adaptability to the incident light angle, presenting the stable absorption efficiency of 80% in the wide incident range of 0–80°. The results demonstrate that the absorption layer with photonic crystal structure can realize the wide spectrum, wide angle, and high absorption of incident light, resulting in the increased utilization efficiency of solar energy.

Optical spectra of two-dimensional photonic crystal bars based on macroporous Si

2011 ◽  
Author(s):  
Sergey A. Dyakov ◽  
Ekaterina V. Astrova ◽  
Tatiana S. Perova ◽  
Vladimir A. Tolmachev ◽  
Galina V. Fedulova ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Spectra ◽  
Two Dimensional ◽  
Dimensional Photonic Crystal ◽  
Two Dimensional Photonic Crystal
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