A Flexible Conjugated Polymer Laser

Kallinger, C.; Hilmer, Martin; Haugeneder, A.; Perner, M.; Spirkl, W.; Lemmer, Uli; Feldmann, Jochen; Scherf, Ullrich; Müllen, Kläus; Gombert, Andreas; Wittwer, V.

doi:10.1002/(sici)1521-4095(199808)10:12<920::aid-adma920>3.3.co;2-z

Cited by 21 publications

(22 citation statements)

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“…[4][5][6][7] One of the most promising approaches toward an organic injection laser is the use of distributed feedback resonators realized with nanopatterned plastic substrates fabricated by conventional or novel soft lithography methods. 8,9 This strategy might lead to large area lasing devices of virtually any shape not possible with inorganic semiconductor materials. In order to achieve a further reduction of the laser threshold and to control the emission properties, it is crucial to reduce the number of lateral modes participating in the laser operation.…”

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confidence: 99%

A nearly diffraction limited surface emitting conjugated polymer laser utilizing a two-dimensional photonic band structure

Riechel

Kallinger

Lemmer

et al. 2000

Applied Physics Letters

198

117

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We have fabricated a mechanically flexible conjugated polymer laser utilizing distributed feedback due to a two-dimensional photonic band structure. An ultraviolet-embossing process is used for nanopatterning a plastic substrate. On top we spin-coat a ladder-type poly(p-phenylene) as the active laser medium. Upon optical pumping, we observe a low threshold and nearly diffraction limited monomode laser emission perpendicular to the surface. Our results are explained within a Laue formulation for the feedback mechanism in the two-dimensional organic photonic crystal.

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confidence: 99%

A nearly diffraction limited surface emitting conjugated polymer laser utilizing a two-dimensional photonic band structure

Riechel

Kallinger

Lemmer

et al. 2000

Applied Physics Letters

198

117

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“…This is more lasing and amplified spontaneous emission than four orders of magnitude higher than have been observed in a wide range of semi-mobilities in materials used in conventional conducting polymers, small molecules, and or-OLEDs (4,8,10). Tetracene also offers a ganic single crystals (1)(2)(3)(4)(5)(6)(7)(8)(9). Moreover, amor-reasonably high photoluminescence quantum phous or nearly amorphous organic and poly-yield, and electroluminescence has been remeric semiconductors have been very success-ported for single-crystal diodes (12).…”

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confidence: 99%

An Organic Solid State Injection Laser

Schön¹,

Kloc²,

Dodabalapur³

et al. 2000

Science

223

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We report on electrically driven amplified spontaneous emission and lasing in tetracene single crystals using field-effect electrodes for efficient electron and hole injection. For laser action, feedback is provided by reflections at the cleaved edges of the crystal resulting in a Fabry-Perot resonator. Increasing the injected current density above a certain threshold value results in the decreasing of the spectral width of the emission from 120 millielectron volts to less than 1 millielectron volt because of gain narrowing and eventually laser action. High electron and hole mobilities as well as balanced charge carrier injection lead to improved exciton generation in these gate-controlled devices. Moreover, the effect of charge-induced absorption is substantially reduced in high-quality single crystals compared with amorphous organic materials.

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“…Accordingly, LPPPs are promising materials to build electric-optical devices, e.g., light-emitting diodes ͑LEDs͒ 1,2 and flexible organic layers with lasing properties. 3 In addition, their high molecular weight causes excellent processibility and mechanical robustness, which is of high importance in LED and photoreceptor applications.…”

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confidence: 99%

Xerographic study on a ladder-type poly(para-phenylene)

Pan

Scherf

Schreiber

et al. 2000

The Journal of Chemical Physics

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Photogeneration of charge carriers in a methyl-substituted ladder-poly͑para-phenylene͒ ͑LPPP͒ has been investigated by xerographic experiments. The quantum efficiency of charge carrier generation was calculated by evaluating the photoinduced discharge curves ͑PIDCs͒ and found to be independent of both excitation wavelength and temperature. The results can be described by a modified Braun theory with a simple exponential distribution of radii of thermalized electrons. LPPP shows a very high primary quantum efficiency of 80%, a low residual potential, and a small dark decay. Thus, LPPP represents a promising material to build single component single-layer photoreceptors.

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A Flexible Conjugated Polymer Laser

Cited by 21 publications

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A nearly diffraction limited surface emitting conjugated polymer laser utilizing a two-dimensional photonic band structure

A nearly diffraction limited surface emitting conjugated polymer laser utilizing a two-dimensional photonic band structure

An Organic Solid State Injection Laser

Xerographic study on a ladder-type poly(para-phenylene)

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