Upconversion of low-energy photons in semiconductor nanostructures for solar energy harvesting

Chen, Eric Y.; Milleville, Christopher C.; Zide, Joshua M. O.; Doty, Matthew F.; Zhang, Jing

doi:10.1557/mre.2018.15

Cited by 20 publications

(18 citation statements)

References 92 publications

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“…TiO 2 , ZnO, etc.) is upconversion (Chen et al, 2018). This is a type of anti-stoke process in which emission of higher energy photons is achieved by the absorption of two or more low-energy photons (Naik et al, 2017).…”

Section: Photoactive Species For Pec Biosensorsmentioning

confidence: 99%

Affinity-Based Detection of Biomolecules Using Photo-Electrochemical Readout

et al. 2019

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Detection and quantification of biologically-relevant analytes using handheld platforms are important for point-of-care diagnostics, real-time health monitoring, and treatment monitoring. Among the various signal transduction methods used in portable biosensors, photoelectrochemcial (PEC) readout has emerged as a promising approach due to its low limit-of-detection and high sensitivity. For this readout method to be applicable to analyzing native samples, performance requirements beyond sensitivity such as specificity, stability, and ease of operation are critical. These performance requirements are governed by the properties of the photoactive materials and signal transduction mechanisms that are used in PEC biosensing. In this review, we categorize PEC biosensors into five areas based on their signal transduction strategy: (a) introduction of photoactive species, (b) generation of electron/hole donors, (c) use of steric hinderance, (d) in situ induction of light, and (e) resonance energy transfer. We discuss the combination of strengths and weaknesses that these signal transduction systems and their material building blocks offer by reviewing the recent progress in this area. Developing the appropriate PEC biosensor starts with defining the application case followed by choosing the materials and signal transduction strategies that meet the application-based specifications.

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Section: Photoactive Species For Pec Biosensorsmentioning

confidence: 99%

Affinity-Based Detection of Biomolecules Using Photo-Electrochemical Readout

et al. 2019

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“…In parallel, starting around 2010, reviews about the possibility of using triplet–triplet annihilation upconversion (TTA-UC) started appearing . The key advantage of this organic UC process was that it required significantly lower excitation power densities compared to Ln 3+ -based UC, however, the materials were extremely sensitive to oxygen quenching, could only operate in the visible region of the solar spectrum, and typically performed better when in the liquid state rather than in the solid state. , Two very insightful UC review articles for PV are those by Goldschmidt and Fischer in 2015 and Chen et al in 2018. The latter also focused heavily on UC based on semiconducting nanostructures, a topic that lies somewhat outside the direct scope of this review but is covered briefly in the Outlook section.…”

Section: Introductionmentioning

confidence: 99%

Photon Upconversion for Photovoltaics and Photocatalysis: A Critical Review

et al. 2021

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Opportunities for enhancing solar energy harvesting using photon upconversion are reviewed. The increasing prominence of bifacial solar cells is an enabling factor for the implementation of upconversion, however, when the realistic constraints of current best-performing silicon devices are considered, many challenges remain before silicon photovoltaics operating under nonconcentrated sunlight can be enhanced via lanthanide-based upconversion. A photophysical model reveals that >1–2 orders of magnitude increase in the intermediate state lifetime, energy transfer rate, or generation rate would be needed before such solar upconversion could start to become efficient. Methods to increase the generation rate such as the use of cosensitizers to expand the absorption range and the use of plasmonics or photonic structures are reviewed. The opportunities and challenges for these approaches (or combinations thereof) to achieve efficient solar upconversion are discussed. The opportunity for enhancing the performance of technologies such as luminescent solar concentrators by combining upconversion together with micro-optics is also reviewed. Triplet–triplet annihilation-based upconversion is progressing steadily toward being relevant to lower-bandgap solar cells. Looking toward photocatalysis, photophysical modeling indicates that current blue-to-ultraviolet lanthanide upconversion systems are very inefficient. However, hope remains in this direction for organic upconversion enhancing the performance of visible-light-active photocatalysts.

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“…In many industries where toxic dyestuffs are intensively used such as textile and paper, considerable amount of polluted water effluents are produced and released into the environment. These dye molecules endanger the aquatic life [1][2][3]. Semiconductors are useful materials for the eliminating process of these materials in an environmentally friendly way.…”

Section: Introductionmentioning

confidence: 99%

A low cost flexible photocatalyst based on silver decorated Cu2O nanowires

Polat

2020

SN Appl. Sci.

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In this study a low cost photocatalyst design was introduced based on the silver nanoparticle decorated Cu 2 O nanowires that were grown on flexible copper substrate. Photocatalyst was characterized by using scanning electron microscope, energy dispersive X-ray scattering (EDS), UV-vis diffuse reflectance spectroscopy and X-ray diffractometer. Band gap energy values for Cu 2 O and Ag decorated Cu 2 O were determined as 2.37 eV and 2.17 eV respectively. Photocatalytic activity was tested against methylene blue (MB) degradation at three different pH values. Although no noticeable difference was observed, pH 5.3 was faster. Decreasing methylene blue concentration was followed up by UV-vis spectroscopy. Visible light adsorption increased by decorating the Cu 2 O nanowires with silver nanoparticles. Kinetics of degradation was found to be first order with a R-squared value of 0.99. Nearly total MB was degraded at 300 min. Degradation was verified by high pressure liquid chromatography. Absence of initial MB retention peaks showed a successfully degradation under 100 W LED light illumination. Flexible copper support under the nanowire arrays presents an advantage of easy removal for the photocatalyst. After the end of the reaction, no photocatalyst residue is left when compared to the powder photocatalyst systems eliminating the heavy filtration processes.

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Upconversion of low-energy photons in semiconductor nanostructures for solar energy harvesting

Abstract: ABSTRACT

Cited by 20 publications

References 92 publications

Affinity-Based Detection of Biomolecules Using Photo-Electrochemical Readout

Affinity-Based Detection of Biomolecules Using Photo-Electrochemical Readout

Photon Upconversion for Photovoltaics and Photocatalysis: A Critical Review

A low cost flexible photocatalyst based on silver decorated Cu2O nanowires

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