Ultrathin optical design for organic photovoltaic cells

Man, Jiaxiu; Luo, Deying; Yu, Liang; Wang, D.K.; Liu, Z.; Lu, Zheng‐Hong

doi:10.1016/j.optcom.2014.12.029

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…Recently, a series of new materials that are potentially useful in the field of organic electronics as photonics, − sensors and actuators, − photovoltaic cells, − organic light-emitting diodes, − and photoswitching systems has been synthesized . Some of them are π-conjugated molecules, ,, such as the salicylidenes, which have interesting applications in material sciences, coordination chemistry, − catalysis, − supramolecular chemistry, ,− optical chemosensors, and photonics and in OLEDs as active layers and electron transport layers. − ,,, Salicylidenes have been widely used in coordination chemistry as ligands , that coordinate with certain metal atoms, including Al(III), Zn(II), , Ru(II), , Pt(II), Ni(II), and Cu(II). , …”

Section: Introductionmentioning

confidence: 99%

Dual Emissions of Salicylidene-5-chloroaminepyridine Due to Excited State Intramolecular Proton Transfer: Dynamic Photophysical and Theoretical Studies

et al. 2015

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In this study, the photophysical properties of N-salycilidene-5-chloroaminopyridine were evaluated. This molecule presented dual emission from the keto* and enol* species, depending on the solvent used (DMSO or methanol in the absence and presence of trifluoroacetic acid). This molecule was synthesized through a dehydration reaction of salicylaldehyde under sonication and characterized using FTIR, cyclic voltammetry, mass spectrometry, and single-crystal X-ray diffraction, yielding the molecular structure. Theoretical calculations were performed under the DFT framework and its time-dependent counterpart. Our results suggest the occurrence of excited state proton transfer, ESIPT, in the aprotic solvent, leading to a keto*–enol* balance, which is confirmed by the emission bands observed at 425 and 545 nm, respectively. However, in a protic environment (methanol or DMSO with trifluoroacetic acid), only the enol form is emissive due to the hydrogen bonding between the iminic group and the solvent. Molecules with double emissions are potentially useful for white light emitting diodes.

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Section: Introductionmentioning

confidence: 99%

Dual Emissions of Salicylidene-5-chloroaminepyridine Due to Excited State Intramolecular Proton Transfer: Dynamic Photophysical and Theoretical Studies

et al. 2015

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“…The ultra-thin-film mechanism also shows promise for organic photovoltaics (OPVs), which have thickness limitations due to exciton diffusion lengths that are on the order of 10 nm [68]. For example, a recent report showed that OPV films comprising P3HT:PCBM, a wellknown OPV bulk heterostructure composite, can be made as thin as 60 nm and still absorb as much as 90% of the incident light when backed by an Al substrate [69], with similar results for other OPV materials [70]. Though no overall efficiency records have been approached thus far, the ultra-thin film mechanism has been used to demonstrate a-Si photovoltaics that have large quantum efficiencies over relatively narrow wavelength ranges, and can have decorative qualities because of their structural colors in reflection [71] and transmission [42].…”

Section: Solar Energy Applicationsmentioning

confidence: 63%

Optical absorbers based on strong interference in ultra‐thin films

Kats

Capasso

2016

Laser & Photonics Reviews

213

189

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Optical absorbers find uses in a wide array of applications across the electromagnetic spectrum, including photovoltaic and photochemical cells, photodetectors, optical filters, stealth technology, and thermal light sources. Recent efforts have sought to reduce the footprint of optical absorbers, conventionally based on graded structures or Fabry-Perot-type cavities, by using emerging concepts in plasmonics, metamaterials, and metasurfaces. Unfortunately, these new absorber designs require patterning on subwavelength length scales, and are therefore impractical for many large-scale optical and optoelectronic devices. In this article, we summarize recent progress in the development of optical absorbers based on lossy films with thicknesses significantly smaller than the incident optical wavelength. These structures have a small footprint and require no nanoscale patterning. We outline the theoretical foundation of these absorbers based on "ultra-thin-film interference", including the concepts of loss-induced phase shifts and critical coupling, and then review several applications, including ultra-thin color coatings, decorative photovoltaics, highefficiency photochemical cells, and infrared scene generators.

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Colorful conducting polymers for vivid solar panels

Man

Chen

et al. 2021

Nano Energy

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Ultrathin optical design for organic photovoltaic cells

Cited by 4 publications

References 26 publications

Dual Emissions of Salicylidene-5-chloroaminepyridine Due to Excited State Intramolecular Proton Transfer: Dynamic Photophysical and Theoretical Studies

Dual Emissions of Salicylidene-5-chloroaminepyridine Due to Excited State Intramolecular Proton Transfer: Dynamic Photophysical and Theoretical Studies

Optical absorbers based on strong interference in ultra‐thin films

Colorful conducting polymers for vivid solar panels

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