Broadband and omnidirectional light harvesting enhancement in photovoltaic devices with aperiodic TiO2 nanotube photonic crystal

Guo, Min; Su, Haijun; Zhang, Jun; Liu, Lin; Fu, Nianqing; Yong, Zheng; Huang, Haitao; Xie, Keyu

doi:10.1016/j.jpowsour.2017.01.123

Cited by 16 publications

(7 citation statements)

References 38 publications

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“…Photonic crystals (PCs) are micro-/nanostructures that play important roles in light-driven applications, including photocatalysis, − photovoltaics, − optics, and biosensing . The rational design of the PC’s structure amplifies light–matter interactions by controlling, modulating, and trapping the propagation of electromagnetic waves across its structure via Bragg diffraction, multiple scattering, and the “slow photon” effect. − Bragg diffraction forbids light from propagating across the PC’s structure due to its characteristic photonic stopband (PSB).…”

Section: Introductionmentioning

confidence: 99%

“…Anodization is an industrially scalable, ecofriendly, highly controllable, and low-cost electrochemical process broadly used in metal finishing industry to modify the properties of metals such as color, brightness, wettability, and corrosion protection. The generation of nanoporous PCs by anodization is a versatile approach that enables the development of PC systems with precisely engineered optical properties for different applications, including optical sensing and biosensing, − light filtering, , energy harvesting, − and photocatalysis. ,− NAA produced by anodization of aluminum is an excellent platform material to develop PC structures due to its highly versatile and controllable nanoporous structure. However, NAA has a wide energy bandgap (i.e., 7.0–9.5 eV) that prevents the direct use of NAA-PCs in photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

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Rational Management of Photons for Enhanced Photocatalysis in Structurally-Colored Nanoporous Anodic Alumina Photonic Crystals

Lim

Law

Marković

et al. 2019

ACS Appl. Energy Mater.

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A comprehensive study on the engineering of titanium dioxide-functionalized nanoporous anodic alumina distributed Bragg reflectors (TiO 2-NAA-DBRs) for photocatalysis enhanced by the "slow photon" effect is presented. The photocatalytic performance of these composite photonic crystals (PCs) is assessed by monitoring photodegradation of a variety of organic molecules with absorbance bands across the spectral regions. This study demonstrates that photocatalytic performance of TiO 2-NAA-DBRs is enhanced by the "slow photon" effect when the edges of the PC's photonic stopband (PSB) fall within the absorbance band of the organic molecules. The photocatalytic performance is significantly enhanced when the PSB's red edge is in close proximity to the absorbance band of the organic molecules. Overall photocatalytic degradation is also dependent on the total pore length of the PC structure, charge of the organic molecules, percentage of vis-NIR irradiation and matrix complexity (i.e. interfering ions and molecules) when the PC's PSB is partially or entirely misaligned with respect to the absorbance band of the organic molecules. Finally, the real-life application of TiO 2-NAA-DBRs to degrade pollutants such as pesticides in environmental matrices is

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rational Management of Photons for Enhanced Photocatalysis in Structurally-Colored Nanoporous Anodic Alumina Photonic Crystals

Lim

Law

Marković

et al. 2019

ACS Appl. Energy Mater.

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“…Similar experimental works have been studied later by other groups. [150][151][152][153] Last, we present a QD-based LSC coupled with 3D microporous PC to improve photon collection and concentrating efficiency. [23] By coating PC on the top and bottom of the device, both EQE and the ratio of the output and the input photon flus densities were enhanced significantly (Figure 6d).…”

Section: Photonic Crystal Cavitymentioning

confidence: 99%

Optical Resonator Enhanced Photovoltaics and Photocatalysis: Fundamental and Recent Progress

Yuan

Chen

2021

Laser & Photonics Reviews

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Solar light is recognized as one of the most valuable sustainable energy sources of the future. Finding solutions to enhance energy-conversion efficiency is of paramount significance for realizing more efficient photovoltaic and photocatalytic devices. Remarkable development in chemical and physical strategies has been explored to increase the optical-absorption coefficients, extend the spectral range, and optimize the light-harvesting and conversion efficiency. Optical resonators, which play a ubiquitous role in modern optics, possess the unique ability to provide strong optical confinement and enormous light-matter interactions. Such features have attracted tremendous attention in photoelectric enhancement and applications in photovoltaic, photocatalysis, and even light-emitting devices recently. This review presents theoretical as well as experimental progress on enhanced photovoltaic and photocatalysis by exploiting optical resonators. Fundamentals of various optical cavities are discussed according to confinement and photoelectric enhancing mechanism, including Fabry-Perot, whispering gallery mode, photonic crystal, plasmonics, and hybrid cavities. Finally, the application prospects of cavity-enhanced photoelectric effect, including strong coupling, cavity design, and challenges are discussed. It is envisioned that the successful implementation of optical resonators in photoenergy applications may open a promising avenue for a broad spectrum of light-energy-conversion technologies.

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“…With light as the main medium of solar cells, the light reflection loss at the interface between high and low refractive index is inevitable, which is one of the main reasons for the low efficiency of solar cells at present. Nanostructured solar cells with advantages of high local electric field [ 8 , 40 ], wide operating wavelength [ 24 , 41 ], and omnidirectionality [ 24 , 41 ] have been expected as an ideal solution in recent years. Therefore, a thin film solar cell model was built to further study the light-trapping performance of the CSNP.…”

Section: Introductionmentioning

confidence: 99%

High Anti-Reflection Large-Scale Cup-Shaped Nano-Pillar Arrays via Thin Film Anodic Aluminum Oxide Replication

et al. 2022

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Surface anti-reflection (AR) with nanometer-scaled texture has shown excellent light trapping performance involving optical devices. In this work, we developed a simple and lithography-free structure replication process to obtain large scale surface cup-shaped nano-pillar (CSNP) arrays for the first time. A method of depositing was used for pattern transfer based on PMMA pre-coated through-hole anodic aluminum oxide (AAO) thin film (~500 nm), and eventually, the uniformity of the transferred nanostructures was guaranteed. From the spectrum (250 nm~2000 nm) dependent measurements, the CSNP nanostructured Si showed excellent AR performance when compared with that of the single-polished Si. Moreover, the CSNP was found to be polarization insensitive and less dependent on incidence angles (≤80°) over the whole spectrum. To further prove the excellent antireflective properties of the CSNP structure, thin film solar cell models were built and studied. The maximum value of Jph for CSNP solar cells shows obvious improvement comparing with that of the cylinder, cone and parabola structured ones. Specifically, in comparison with the optimized Si3N4 thin film solar cell, an increment of 54.64% has been achieved for the CSNP thin film solar cell.

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Broadband and omnidirectional light harvesting enhancement in photovoltaic devices with aperiodic TiO2 nanotube photonic crystal

Cited by 16 publications

References 38 publications

Rational Management of Photons for Enhanced Photocatalysis in Structurally-Colored Nanoporous Anodic Alumina Photonic Crystals

Rational Management of Photons for Enhanced Photocatalysis in Structurally-Colored Nanoporous Anodic Alumina Photonic Crystals

Optical Resonator Enhanced Photovoltaics and Photocatalysis: Fundamental and Recent Progress

High Anti-Reflection Large-Scale Cup-Shaped Nano-Pillar Arrays via Thin Film Anodic Aluminum Oxide Replication

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