Near-IR Light-Tunable Omnidirectional Broadband Terahertz Wave Antireflection Based on a PEDOT:PSS/Graphene Hybrid Coating

Lai, Weien; Liu, Gen; Gou, Hanguang; Wu, Huizhen; Rahimi‐Iman, Arash

doi:10.1021/acsami.2c10186

Cited by 4 publications

(1 citation statement)

References 51 publications

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“…After depositing the PEDOT:PSS-graphene-pentacoordinated organotin(IV) hybrid films by spin coating, AFM was performed in order to determine both the topography and homogeneity of the hybrid films. Film surface roughness is one of the most important parameters for optoelectronic devices, since roughness causes an increase in film resistance and a decrease in operational performance [ 58 , 59 ]. Table 4 shows the root-mean-square (RMS) roughness; the average roughness (R a ) and AFM images of the surface topography in a 5 × 5 μm area are shown in Figure 5 .…”

Section: Resultsmentioning

confidence: 99%

Pentacoordinated Organotin(IV) Complexes as an Alternative in the Design of Highly Efficient Optoelectronic and Photovoltaic Devices: Synthesis and Photophysical Characterization

Sánchez-Vergara

Gómez

Dircio

et al. 2023

IJMS

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The synthesis of four pentacoordinated organotin(IV) complexes prepared in a one-pot reaction from 2-hydroxy-1-naphthaldehyde, 2-amino-3-hydroxypyridine and organotin oxides is reported. The complexes were characterized by UV-Vis, IR, MS, 1H, 13C and 119Sn NMR techniques. The compound based on 2,2-diphenyl-6-aza-1,3-dioxa-2-stannanaphtho[1,2-h]pyrido[3,2-d]cyclononene revealed the formation of a monomeric complex with a distorted five-coordinated molecular geometry intermediate between the trigonal bipyramidal and square pyramidal. In order to find possible applications in photovoltaic devices, hybrid films of organotin(IV) complexes embedded in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) with graphene were deposited. The topographic and mechanical properties were examined. The film with the complex integrated into the cyclohexyl substituent has high plastic deformation, with a maximum stress of 1.69 × 107 Pa and a Knoop hardness of 0.061. The lowest values of 1.85 eV for the onset gap and 3.53 eV for the energy gap were obtained for the heterostructure having the complex with the phenyl substituent. Bulk heterojunction devices were fabricated; these devices showed ohmic behavior at low voltages and a space-charge-limited current (SCLC) conduction mechanism at higher voltages. A value of 0.02 A was found for the maximum carried current. The SCLC mechanism suggests hole mobility values of between 2.62 × 10−2 and 3.63 cm2/V.s and concentrations of thermally excited holes between 2.96 × 1018 and 4.38 × 1018 m−3.

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Section: Resultsmentioning

confidence: 99%

Pentacoordinated Organotin(IV) Complexes as an Alternative in the Design of Highly Efficient Optoelectronic and Photovoltaic Devices: Synthesis and Photophysical Characterization

Sánchez-Vergara

Gómez

Dircio

et al. 2023

IJMS

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Highly conductive and elastic multi-responsive phase change smart fiber and textile

He,

Liu,

Tian

et al. 2023

Composites Communications

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Reconfigurable wide-angle broadband terahertz wave antireflection using a non-volatile phase-change material

Lai,

Gou,

Huang

et al. 2024

Opt. Lett.

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Actively wide-angle broadband terahertz (THz) antireflection (AR) coatings with a flexible reconfigurability have a great potential for the development of next-generation versatile THz components and systems with high performance. Here, we present a reconfigurable wide-angle broadband THz AR coating using a phase change material Ge2Sb2Te5 (GST) film, which is based on the impedance matching method. The performance of GST-based AR coating can be effectively achieved by a thermal excitation, exhibiting the complete suppression of unwanted THz-wave reflections for incidence angles from 0∘ to 50∘ in the broad frequency range of 0.1–3.0 THz. Simulation and experimental results show that the GST-based AR coating can efficiently eliminate Fabry–Perot interference caused by unwanted THz-wave reflections from the substrate, thereby significantly improving the performances of THz devices. Moreover, the active AR mechanism of the GST-based coating is investigated, which elucidates the essential role of the phase transition between the amorphous and crystalline phases in changing the conductivity of the film to achieve an impedance matching condition under thermal excitation. Additionally, the non-volatile properties of GST can enable the AR coating to retain a long-term stability for optimal wave-impedance matching without power holding requirements. Our work provides a new, to the best of our knowledge, and promising way for realizing high-performance integrated THz components and systems in the future.

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Near-IR Light-Tunable Omnidirectional Broadband Terahertz Wave Antireflection Based on a PEDOT:PSS/Graphene Hybrid Coating

Cited by 4 publications

References 51 publications

Pentacoordinated Organotin(IV) Complexes as an Alternative in the Design of Highly Efficient Optoelectronic and Photovoltaic Devices: Synthesis and Photophysical Characterization

Pentacoordinated Organotin(IV) Complexes as an Alternative in the Design of Highly Efficient Optoelectronic and Photovoltaic Devices: Synthesis and Photophysical Characterization

Highly conductive and elastic multi-responsive phase change smart fiber and textile

Reconfigurable wide-angle broadband terahertz wave antireflection using a non-volatile phase-change material

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