Photoactive organic-inorganic hybrid polymer waveguides for optical device technologies

Collins, Abigail R.; Southern, Thomas J. F.; Lyu, Guanpeng; Bennison, Michael J.; Evans, Rachel C.

doi:10.1117/12.2564510

Cited by 4 publications

(13 citation statements)

References 10 publications

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Section: How Can Fret Mitigate Energy Loss In Lscs?mentioning

confidence: 99%

“…However, the mechanical and optical properties can be easily tuned by changing the branching, molecular weight, or chemical composition of the polymer backbone. [ 71 ] The PL arises from a combination of two radiative processes, namely photoinduced proton transfer at the urea linkages and electron–hole recombination of localized oxygen defects in the siliceous nanodomains. [ 72a ] As such, the PL spectrum shows strong excitation wavelength dependence, due to the relative absorptivity of the two species at a particular spectral position.…”

Section: How Can Fret Mitigate Energy Loss In Lscs?mentioning

confidence: 99%

“…[ 71 ] The PLQY of ureasils varies approximately from 4% to 16% depending on the structure of the polymer precursor and the conditions used for the synthesis. [ 71,73 ]…”

Section: How Can Fret Mitigate Energy Loss In Lscs?mentioning

confidence: 99%

“…While ureasils are optically transparent under visible light, they exhibit blue photoluminescence under UV irradiation (365 nm). [71,72] The general ureasil structure comprises a siliceous backbone which is chemically grafted via urea bridges to poly(ethylene oxide)/poly(propylene oxide) chains (Figure 12b). However, the mechanical and optical properties can be easily tuned by changing the branching, molecular weight, or chemical composition of the polymer backbone.…”

Section: Photoactive Host Systemsmentioning

confidence: 99%

“…[72a] As such, the PL spectrum shows strong excitation wavelength dependence, due to the relative absorptivity of the two species at a particular spectral position. [71] The PLQY of ureasils varies approximately from 4% to 16% depending on the structure of the polymer precursor and the conditions used for the synthesis. [71,73] Due to their inherent photoluminescence, ureasils have been explored as active hosts for inorganic ions/complexes, [75] conjugated polymers, [48,72b,73b] and molecular dyes [74] in which the excitation wavelength dependence of the ureasil is exploited to modulate energy transfer between the host and dopant or expand the light-harvesting window.…”

Section: Photoactive Host Systemsmentioning

confidence: 99%

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Förster Resonance Energy Transfer in Luminescent Solar Concentrators

et al. 2022

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Luminescent solar concentrators (LSCs) are an emerging technology to collect and channel light from a large absorption area into a smaller one. They are a complementary technology for traditional solar photovoltaics (PV), particularly suitable for application in urban or indoor environments where their custom colors and form factors, and performance under diffuse light conditions may be advantageous. Förster resonance energy transfer (FRET) has emerged as a valuable approach to overcome some of the intrinsic limitations of conventional single lumophore LSCs, such as reabsorption or reduced quantum efficiency. This review outlines the potential of FRET to boost LSC performance, using highlights from the literature to illustrate the key criteria that must be considered when designing an FRET‐LSC, including both the photophysical requirements of the FRET lumophores and their interaction with the host material. Based on these criteria, a list of design guidelines intended to aid researchers when they approach the design of a new FRET‐LSC system is presented. By highlighting the unanswered questions in this field, the authors aim to demonstrate the potential of FRET‐LSCs for both conventional solar‐harvesting and emerging LSC‐inspired technologies and hope to encourage participation from a diverse researcher base to address this exciting challenge.

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Section: How Can Fret Mitigate Energy Loss In Lscs?mentioning

confidence: 99%

Section: How Can Fret Mitigate Energy Loss In Lscs?mentioning

confidence: 99%

“…[ 71 ] The PLQY of ureasils varies approximately from 4% to 16% depending on the structure of the polymer precursor and the conditions used for the synthesis. [ 71,73 ]…”

Section: How Can Fret Mitigate Energy Loss In Lscs?mentioning

confidence: 99%

Section: Photoactive Host Systemsmentioning

confidence: 99%

Section: Photoactive Host Systemsmentioning

confidence: 99%

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Förster Resonance Energy Transfer in Luminescent Solar Concentrators

et al. 2022

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Ultra‐Small Air‐Stable Triplet‐Triplet Annihilation Upconversion Nanoparticles for Anti‐Stokes Time‐Resolved Imaging

Zhang,

Richards,

Jones

et al. 2023

Angewandte Chemie

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Image contrast is often limited by background autofluorescence in steady‐state bioimaging microscopy. Upconversion bioimaging can overcome this by shifting the emission lifetime and wavelength beyond the autofluorescence window. Here we demonstrate the first example of triplet‐triplet annihilation upconversion (TTA‐UC) based lifetime imaging microscopy. A new class of ultra‐small nanoparticle (NP) probes based on TTA‐UC chromophores encapsulated in an organic–inorganic host has been synthesised. The NPs exhibit bright UC emission (400–500 nm) in aerated aqueous media with a UC lifetime of ≈1 μs, excellent colloidal stability and little cytotoxicity. Proof‐of‐concept demonstration of TTA‐UC lifetime imaging using these NPs shows that the long‐lived anti‐Stokes emission is easily discriminable from typical autofluorescence. Moreover, fluctuations in the UC lifetime can be used to map local oxygen diffusion across the subcellular structure. Our TTA‐UC NPs are highly promising stains for lifetime imaging microscopy, affording excellent image contrast and potential for oxygen mapping that is ripe for further exploitation.

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