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000890300 1001_ $$0P:(DE-Juel1)128613$$aMikulics, M.$$b0$$eCorresponding author
000890300 245__ $$aConditioning nano-LEDs in arrays by laser-micro-annealing: The key to their performance improvement
000890300 260__ $$aMelville, NY$$bAmerican Inst. of Physics$$c2021
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000890300 520__ $$aA local so-called laser-micro-annealing (LMA) conditioning technology, which is suitable for the fabrication of a large range of hybrid nano-optoelectronic devices, was applied to III-nitride-based nano-light emitting diodes (LEDs). The LEDs with a diameter of ∼100 nm were fabricated in large area arrays and designed for hybrid optoelectronic applications. The LMA process was developed for the precise local conditioning of LED nano-structures. Photoluminescence measurements reveal the enhancement of nano-LED properties, which is in very good agreement with a simple model introduced based on the reduction of the defect layer depth by the LMA process. The experimental data confirm the reduction of the defect layer depth from ∼17 nm to ∼5 nm determined. In consequence, an increase in work currents up to 40 nA at 5 V bias after the LMA procedure as well as high electroluminescence (EL) and output optical power up to 150 nW in the ∼440–445 nm emission wavelength range corresponding to ∼75% wall-plug efficiency were achieved. Additionally, the LEDs' electroluminescence intensities reach the desired values by conditioning the contact/annealed regions of individual LEDs accordingly. Furthermore, the LMA process affects the long-term stability of the electroluminescence (EL) intensity of single nano-LED devices. A study of the EL during 5000 h in the continuous wave operation testing mode revealed a moderate ∼15% decrease in the intensity in comparison to ∼50% for their non-LMA counterparts. Finally, Raman measurements indicate that the “work” temperature for nano-LED conditioned structures decreases.
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000890300 7001_ $$0P:(DE-HGF)0$$aKordoš, P.$$b1
000890300 7001_ $$0P:(DE-HGF)0$$aGregušová, D.$$b2
000890300 7001_ $$0P:(DE-HGF)0$$aSofer, Z.$$b3
000890300 7001_ $$0P:(DE-HGF)0$$aWinden, A.$$b4
000890300 7001_ $$0P:(DE-Juel1)128856$$aTrellenkamp, Stefan$$b5
000890300 7001_ $$0P:(DE-Juel1)128616$$aMoers, Jürgen$$b6
000890300 7001_ $$0P:(DE-Juel1)130824$$aMayer, Joachim$$b7$$ufzj
000890300 7001_ $$0P:(DE-Juel1)125593$$aHardtdegen, H.$$b8$$eCorresponding author
000890300 773__ $$0PERI:(DE-600)1469436-0$$a10.1063/5.0038070$$gVol. 118, no. 4, p. 043101 -$$n4$$p043101 -$$tApplied physics letters$$v118$$x1077-3118$$y2021
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