Optical amplification of the cutoff mode in planar asymmetric polymer waveguides

Pauchard, Marc; Vehse, Martin; Swensen, James S.; Moses, D.; Heeger, Alan J.; Perzon, Eric; Andersson, Mats R.

doi:10.1063/1.1627477

Cited by 20 publications

(16 citation statements)

References 16 publications

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“…[27] It is because the recombination-produced emission was confined inside the crystal and effectively waveguided parallel to the device substrate. With respect to this, Pauchard et al [28] remarked that losses introduced by the metal electrodes could be reduced by modifying the FET structure, since the transport direction of the injected charge carriers is perpendicular to the optical confinement. Moreover, variations of the channel width, which correspond to the acting waveguide length, may increase the photon density of the edge emission.…”

Section: Self-waveguided Edge Emissionmentioning

confidence: 99%

High Mobility and Luminescent Efficiency in Organic Single‐Crystal Light‐Emitting Transistors

Bisri

Takenobu

Yomogida

et al. 2009

Adv Funct Materials

249

302

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A high‐performance ambipolar light‐emitting transistor (LET) that has high hole and electron mobilities and excellent luminescence characteristics is described. By using this device, a conspicuous light‐confined edge emission and current‐density‐dependent spectral evolution are observed. These findings will result in broader utilization of device potential and they provide a promising route for realizing electrically driven organic lasers.

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Section: Self-waveguided Edge Emissionmentioning

confidence: 99%

High Mobility and Luminescent Efficiency in Organic Single‐Crystal Light‐Emitting Transistors

Bisri

Takenobu

Yomogida

et al. 2009

Adv Funct Materials

249

302

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“…Pauchard et al 11 described an irregular mode that is confined at the polymer/SiO 2 interface in a multilayer fieldeffect transistor structure, with a propagation loss of only 9 cm −1 , thus leading to a considerably reduced optical gain threshold compared to the regular guided mode. Recently, an optically pumped irregular waveguide mode with a narrowed spectrum was identified and characterized through grazingangle edge emission measurements.…”

Section: Spectrally Narrowed Edge Emission From Organic Light-emittinmentioning

confidence: 99%

Spectrally narrowed edge emission from organic light-emitting diodes

Tian

Gan

Zhou

et al. 2007

Applied Physics Letters

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A dramatic spectrally narrowed edge emission (SNEE) from small molecular organic light-emitting diodes at room temperature, with a full width at half maximum of 5–10nm, is described. The results show that this emission is due to irregular waveguide modes that leak from the indium tin oxide anode to the glass substrate at a grazing angle. Measurements of variable stripe length devices exhibit an apparent weak optical gain, but there is no observable threshold bias associated with this SNEE. Hence this apparent “optical gain” is suspected to result from misalignment of the propagating leaky waveguide mode and the collecting optics.

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“…The emitted photons have an isotropic angular distribution; those that satisfy the condition of total internal reflection (TIR) at the boundaries of the LSC slab are trapped in guided modes of the structure. Photons that do not meet this TIR condition can be also captured, though less effectively, by coupling into leaky modes 10,11 . In a typical arrangement, strips of solar cells mount on the edges of an LSC structure to collect emergent radiation.…”

mentioning

confidence: 99%

Flexible concentrator photovoltaics based on microscale silicon solar cells embedded in luminescent waveguides

et al. 2011

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unconventional methods to exploit monocrystalline silicon and other established materials in photovoltaic (PV) systems can create new engineering opportunities, device capabilities and cost structures. Here we show a type of composite luminescent concentrator PV system that embeds large scale, interconnected arrays of microscale silicon solar cells in thin matrix layers doped with luminophores. Photons that strike cells directly generate power in the usual manner; those incident on the matrix launch wavelength-downconverted photons that reflect and waveguide into the sides and bottom surfaces of the cells to increase further their power output, by more than 300% in examples reported here. unlike conventional luminescent photovoltaics, this unusual design can be implemented in ultrathin, mechanically bendable formats. Detailed studies of design considerations and fabrication aspects for such devices, using both experimental and computational approaches, provide quantitative descriptions of the underlying materials science and optics.

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Optical amplification of the cutoff mode in planar asymmetric polymer waveguides

Cited by 20 publications

References 16 publications

High Mobility and Luminescent Efficiency in Organic Single‐Crystal Light‐Emitting Transistors

High Mobility and Luminescent Efficiency in Organic Single‐Crystal Light‐Emitting Transistors

Spectrally narrowed edge emission from organic light-emitting diodes

Flexible concentrator photovoltaics based on microscale silicon solar cells embedded in luminescent waveguides

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