A Butterfly‐Inspired Hierarchical Light‐Trapping Structure towards a High‐Performance Polarization‐Sensitive Perovskite Photodetector

Abstract

Extensive applications for photodetectors have led to demand for high‐responsivity polarization‐sensitive light detection. Inspired by the elaborate architecture of butterfly Papilio paris, a 1D nanograting bonded porous 2D photonic crystal perovskite photodetector (G‐PC‐PD) using a commercial DVD master and 2D crystalline colloidal arrays template was fabricated. The coupling effect from grating diffraction and reflection of the PC stopband renders the enhanced light harvesting of G‐PC‐PD. The porous scaffold and nanoimprinting process afford a highly crystalline perovskite film. White light responsivity and detectivity of G‐PC‐PD are up to 12.67 A W−1 and 3.22×1013 Jones (6∼7 times that of a pristine perovskite photodetector). The highly ordered nanograting arrays of G‐PC‐PD enable polarization‐sensitive light detection with a rate of −0.72 nA deg−1. This hierarchical perovskite integrated nanograting and 2D PC architecture opens a new avenue to high‐performance optoelectronic devices.

Recent Progress of Heterojunction Ultraviolet Photodetectors: Materials, Integrations, and Applications

“…Worldwide researchers' attention has been paid on perovskites to producing broad applications of light‐emitting diodes (LEDs), optically pumped lasers, pholoelectrochemical (PEC) cells, and photodetectors 6. The direct bandgap nature, high light absorption ability, and wide‐range light absorption of perovskites make them suitable candidates for photodetectors with broadband photoresponse 8. The short conduction pathway for photogenerated charge carriers ensures the related photoelectric devices with fast response speed.…”

“…Presently, the researches on perovskites,6–11 graphene,12 and other materials2,13–16 are emerging in an endless stream and these materials with excellent properties can be used for heterojunction UV PDs. Perovskites are a good choice for optoelectronic devices because of their tunable bandgaps, large extinction coefficient, and so on.…”

Hierarchically Molecular Imprinted Porous Particles for Biomimetic Kidney Cleaning

“…[32][33][34][35][36] Moreover, the periodic pore structure of the inverse opal particles generated brilliant structural colors which enabled sensing and self-reporting of the adsorption state, as manifested by the reflection peak shift of the MIPIOPs. [37][38][39][40][41] It was demonstrated that the hierarchically structured MIPIOPs, integrated with the herringbone mixer, realized efficient cleaning of multiple targets both in water and in serum. Therefore, this novel platform offers great potential in clinical blood purification and artificial kidney construction.…”

Metal Halide Perovskites Functionalized by Patterning Technologies

“…Inspired by the hierarchical structures of the butterfly's black wings, hierarchical perovskite films, whose bottom was a porous 2D photonic crystal (PC) structure and top was a 1D nanograting structure, were fabricated by using spincoating with the monolayer polystyrene (PS) spheres and nanoimprinting with a DVD as presented in Figure 7g). [ 104 ] Optical characterizations and calculation of the field intensity distributions were performed, showing the unique structures endow the perovskite thin films with higher crystallinity and stronger light‐harvesting (Figure 7h). Therefore, the photodetector with 2D PC structures and 1D nanogratings exhibited high white‐light responsivity of 12.67 A W −1 and detectivity of 3.22 × 10 13 Jones, which is 6–7 times higher than that with planar perovskite films (Figure 7i).…”