White light-emitting diodes based on a single InGaN emission layer

Wang, X. H.; Jia, Haiqiang; Li, Guo; Xing, Z. G.; Wang, Y.; Pei, X. J.; Zhou, Jianjun; Chen, H.

doi:10.1063/1.2800797

Cited by 57 publications

(47 citation statements)

References 27 publications

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“…The three modes of heteroepitaxy, however, are of great importance not only for Electronics but for Optics as well. Today the SK mode is widely used in the theory and practices of the formation of quantum dots (Figure 3a) [9] and the FM mode-in the quantum wells ( Figure 3b) [10]. A typical example is [11] where the authors evaluate the wetting layer and its temperature dependence in order to determine the optimal conditions for self-assembly of InAs/GaAs quantum dots.…”

Section: The Growth Modes Of Heteroepitaxymentioning

confidence: 99%

“…A typical example is [11] where the authors evaluate the wetting layer and its temperature dependence in order to determine the optimal conditions for self-assembly of InAs/GaAs quantum dots. Transmission electron microscopy (TEM) images of: (a) InGaN quantum dots [9] formed within a GaN structure and (b) AlGaN/AlN quantum wells [10], both within an AlN structure. (Reproduced from [9,10] with the permission of AIP Publishing).…”

Section: The Growth Modes Of Heteroepitaxymentioning

confidence: 99%

“…This rotation reduces the AlN/sapphire lattice mismatch from 33% to 13.3% so AlN grows on sapphire. Transmission electron microscopy (TEM) images of: (a) InGaN quantum dots [9] formed within a GaN structure and (b) AlGaN/AlN quantum wells [10], both within an AlN structure. (Reproduced from [9,10] with the permission of AIP Publishing).…”

Section: Heteroepitaxy Of Iii-nitridesmentioning

confidence: 99%

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Heteroepitaxy, an Amazing Contribution of Crystal Growth to the World of Optics and Electronics

Tassev

2017

Crystals

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Advances in Electronics and Optics are often preceded by discoveries in Crystal Growth theory and practice. This article represents in retrospect some of the most significant contributions of heteroepitaxy in these and some other areas-the strong impact of the three modes of heteroepitaxy on microelectronics and quantum optics, the big "push" of PENDEO epitaxy in development of Light Emitting Diodes, etc. A large part of the text is dedicated to heteroepitaxy of nonlinear optical materials grown on orientation-patterned templates and used in the development of new quasi-phase-matching frequency conversion laser sources. By achieving new frequency ranges such sources will result in a wide variety of applications in areas such as defense, security, industry, medicine, and science. Interesting facts from the scientific life of major contributors in the field are mixed in the text with fine details from growth experiments, chemical equations, results from material characterizations and some optical and crystallographic considerations-all these presented in a popular way but without neglecting their scientific importance and depth. The truth is that often heteroepitaxy is not just the better but the only available option. The truth is that delays in device development are usually due to gaps in materials research. In all this, miscommunication between different scientific communities always costs vain efforts, uncertainty, and years of going in a wrong scientific direction. With this article we aim to stimulate a constructive dialog that could lead to solutions of important interdisciplinary scientific and technical issues.

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Section: The Growth Modes Of Heteroepitaxymentioning

confidence: 99%

Section: The Growth Modes Of Heteroepitaxymentioning

confidence: 99%

Section: Heteroepitaxy Of Iii-nitridesmentioning

confidence: 99%

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Heteroepitaxy, an Amazing Contribution of Crystal Growth to the World of Optics and Electronics

Tassev

2017

Crystals

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“…There are a variety of ways by which white light LEDs are fabricated, among which the colour mixing method and the phosphor down-conversion method are the most commercially viable (ODIA, 2001;IESN TM-16-05, 2005;Schubert & Kim, 2005;Wang et al, 2007;Zhu & Narendran, 2007). In the colour mixing approach to white light, three separate red, green and blue LEDs are combined to form white light.…”

Section: White Light Conversion Efficiencymentioning

confidence: 99%

A Review of Solid State White Light Emitting Diode and Its Potentials for Replacing Conventional Lighting Technologies in Developing Countries

Ahemen¹,

De²,

Amah³

2014

APR

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Lighting is an indispensable energy end use of man. A significant number people in developing countries live without electric lighting and depend on oil-based lamps. Globally, lighting consumes substantial amount of energy and is a major contributor to green house emissions. Conventional electric lighting systems such as incandescent lamps are highly inefficient and waste energy while the fluorescent/CFL lamps contain toxic chemicals like mercury. Incandescent lamps with short lifespan as well as the fluorescent/CFL lamps pose environmental waste disposal problems (e.g.). The use of renewable energy resource such as solar and wind power systems for example as sources of power for the most efficient and long life lighting source such as high-brightness light emitting diodes (LEDs) (also known as solid state lighting) would reduce global energy consumption for lighting by half, with corresponding reduction in green house emissions. In developing countries solar powered solid state lighting (SPSSL) would ensure access to electric lighting by the disperse population who may not be connected to the national grid in the near feature. In this article we elaborately review the upcoming solid state lighting technology. The physics and principles of operation of LEDs are also reviewed. The impact of this new lighting technology on developing countries in the areas of commerce, education, health and environmental impacts in comparison to conventional lighting technologies is the main thrust of this review.

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“…There are broadly two methods of obtaining white light from LEDs; the colour mixing approach where a blue, green and red LEDs are combined either side by side or in a vertically stacked geometry to obtain white light with high colour rendition index and the phosphor down-conversion method, where a blue or ultraviolet (UV) InGaN LED is used to excite phosphors to produce white light (IESN TM-16-05, 2005;Schubert & Kim, 2005;Brittenham & Vittitow, 2006;Wang, et al 2007;Zhu & Narendran, 2007;Azevedo, 2009). …”

Section: Led Lightingmentioning

confidence: 99%

The Efficacy of Light Emitting Diode (LED) Lamps Used in Rural Communities of Nigeria

Ahemen

Richard²,

Amah³

2012

EER

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This work is focused on the efficacy of regulated LED lamps for effective lighting of rural community households in Nigeria. The result shows that most Nigerian household that were poorly lit by kerosene wick lamp are gradually adapting the light emitting diodes (LED) based lamps. However, since the power supply to this LED lamps are not regulated, the LED lamps suffer illumination looses at faster rate thereby discouraging users. Regulated LED lamps have been shown in this work to provide more stable and long lasting illumination levels for the user.

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White light-emitting diodes based on a single InGaN emission layer

Cited by 57 publications

References 27 publications

Heteroepitaxy, an Amazing Contribution of Crystal Growth to the World of Optics and Electronics

Heteroepitaxy, an Amazing Contribution of Crystal Growth to the World of Optics and Electronics

A Review of Solid State White Light Emitting Diode and Its Potentials for Replacing Conventional Lighting Technologies in Developing Countries

The Efficacy of Light Emitting Diode (LED) Lamps Used in Rural Communities of Nigeria

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