2014
DOI: 10.1109/lpt.2014.2329857
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Internal Quantum Efficiency Enhancement by Relieving Compressive Stress of GaN-Based LED

Abstract: By die-attaching GaN-based light-emitting diodes (LEDs) on Si substrates with eutectic AuSn solder, the external quantum efficiency of the LEDs was enhanced by 3.5% at a current input of 120 A/cm 2 . The enhancement of the external quantum efficiency of the die-attached LED chips is attributed to a reduction in compressive stress and piezoelectric fields in quantum wells after eutectic AuSn die-attachment. Raman and photoluminescence analyses were used to estimate the reduction in compressive stress and piezoe… Show more

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Cited by 8 publications
(2 citation statements)
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“…Moreover, GaN has gained much attention due to its potential applications in series of devices such as LEDs, short wavelength emitters or detectors, high power and high frequency electronic devices [47][48][49]. GaN based LEDs are widely applied in color displays, traffic lights, and solid state lighting [50][51][52]. GaN based semiconductors are highly promising for the fabrication of electronic devices including high electron mobility transistors [53], heterojunction bipolar transistors [54], UV Schottky barrier photodetectors (PDs) [55], and metal semiconductor metal (MSM) PD [56].…”
Section: Gan Propertiesmentioning
confidence: 99%
“…Moreover, GaN has gained much attention due to its potential applications in series of devices such as LEDs, short wavelength emitters or detectors, high power and high frequency electronic devices [47][48][49]. GaN based LEDs are widely applied in color displays, traffic lights, and solid state lighting [50][51][52]. GaN based semiconductors are highly promising for the fabrication of electronic devices including high electron mobility transistors [53], heterojunction bipolar transistors [54], UV Schottky barrier photodetectors (PDs) [55], and metal semiconductor metal (MSM) PD [56].…”
Section: Gan Propertiesmentioning
confidence: 99%
“…Later in 1991, Nakamura [6,7] used the Two-flow Metalorganic Chemical Vapor Deposition (TF-MOCVD) growth method to substantially increase the quality of MBE crystals, and successfully produced the first blue LED with a luminance of 1000 mcd in 1993 [8]. This breakthrough pushed the value of GaN to a new level [9,10]. Not only does GaN have the advantage of being a direct band gap material, it can be used with InN (2.0 eV) and AlN (6.2 eV) to form ternary and quaternary compounds and extend its direct band gap range to 1.95 -6.2 eV with the corresponding wavelength extensions from the green frequency range to that of ultraviolet frequencies, allowing it to be used for expanded applications.…”
Section: Introductionmentioning
confidence: 99%