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000825970 037__ $$aFZJ-2017-00242
000825970 1001_ $$0P:(DE-HGF)0$$aReed, Graham T.$$b0$$eEditor
000825970 1112_ $$aSPIE Photonics West OPTO$$cSan Francisco$$d2016-02-13 - 2016-02-18$$wCalifornia
000825970 245__ $$aDirect bandgap GeSn light emitting diodes for short-wave infrared applications grown on Si
000825970 260__ $$c2016
000825970 300__ $$a97520C-1
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000825970 520__ $$aThe experimental demonstration of fundamental direct bandgap, group IV GeSn alloys has constituted an important step towards realization of the last missing ingredient for electronic-photonic integrated circuits, i.e. the efficient group IV laser source. In this contribution, we present electroluminescence studies of reduced-pressure CVD grown, direct bandgap GeSn light emitting diodes (LEDs) with Sn contents up to 11 at.%. Besides homojunction GeSn LEDs, complex heterojunction structures, such as GeSn/Ge multi quantum wells (MQWs) have been studied. Structural and compositional investigations confirm high crystalline quality, abrupt interfaces and tailored strain of the grown structures. While also being suitable for light absorption applications, all devices show light emission in a narrow short-wave infrared (SWIR) range. Temperature dependent electroluminescence (EL) clearly indicates a fundamentally direct bandgap in the 11 at.% Sn sample, with room temperature emission at around 0.55 eV (2.25 µm). We have, however, identified some limitations of the GeSn/Ge MQW approach regarding emission efficiency, which can be overcome by introducing SiGeSn ternary alloys as quantum confinement barriers. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
000825970 536__ $$0G:(DE-HGF)POF3-521$$a521 - Controlling Electron Charge-Based Phenomena (POF3-521)$$cPOF3-521$$fPOF III$$x0
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000825970 7001_ $$0P:(DE-HGF)0$$aKnights, Andrew P.$$b1$$eEditor
000825970 7001_ $$0P:(DE-Juel1)161247$$avon den Driesch, Nils$$b2$$eCorresponding author
000825970 7001_ $$0P:(DE-Juel1)161180$$aStange, Daniela$$b3
000825970 7001_ $$0P:(DE-HGF)0$$aWirths, Stephan$$b4
000825970 7001_ $$0P:(DE-Juel1)166341$$aRainko, Denis$$b5
000825970 7001_ $$0P:(DE-Juel1)128617$$aMussler, Gregor$$b6
000825970 7001_ $$0P:(DE-HGF)0$$aStoica, Toma$$b7
000825970 7001_ $$0P:(DE-HGF)0$$aIkonic, Zoran$$b8
000825970 7001_ $$0P:(DE-HGF)0$$aHartmann, Jean-Michel$$b9
000825970 7001_ $$0P:(DE-Juel1)125588$$aGrützmacher, Detlev$$b10
000825970 7001_ $$0P:(DE-Juel1)128609$$aMantl, Siegfried$$b11
000825970 7001_ $$0P:(DE-Juel1)125569$$aBuca, Dan Mihai$$b12
000825970 773__ $$a10.1117/12.2211641
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