&lt;title&gt;Photon recycling semiconductor light-emitting diode&lt;/title&gt;

Guo, Xiaoyun; Graff, J. W.; Schubert, E. Fred; Karlicek, R. F.

doi:10.1117/12.382814

Cited by 26 publications

(7 citation statements)

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“…An alternative downconversion material is another semiconductor itself [26]. In this case the phosphor is replaced by a second semiconductor active region, which absorbs some of the emission from the first (shorter-wavelength) semiconductor and subsequently re-emits a photon of longer wavelength.…”

Section: Photon Recycling Semiconductorsmentioning

confidence: 99%

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Research challenges to ultra‐efficient inorganic solid‐state lighting

Phillips¹,

Coltrin

Crawford

et al. 2007

Laser & Photonics Reviews

377

268

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Solid-state lighting is a rapidly evolving, emerging technology whose efficiency of conversion of electricity to visible white light is likely to approach 50% within the next several years. This efficiency is significantly higher than that of traditional lighting technologies, giving solid-state lighting the potential to enable significant reduction in the rate of world energy consumption. Further, there is no fundamental physical reason why efficiencies well beyond 50% could not be achieved, which could enable even more significant reduction in world energy usage. In this article, we discuss in some detail: (a) the several approaches to inorganic solid-state lighting that could conceivably achieve "ultra-high," 70% or greater, efficiency, and (b) the significant research questions and challenges that would need to be addressed if one or more of these approaches were to be realized.

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Section: Photon Recycling Semiconductorsmentioning

confidence: 99%

“…The two semiconductor active regions were brought into close contact by an adhesion process. A portion of the 470 nm emission from the InGaN active region was absorbed by the second active region and was re-emitted as 630 nm photons [26].…”

Section: Photon Recycling Semiconductorsmentioning

confidence: 99%

Research challenges to ultra‐efficient inorganic solid‐state lighting

Phillips¹,

Coltrin

Crawford

et al. 2007

Laser & Photonics Reviews

377

268

View full text Add to dashboard Cite

show abstract

“…White light can also be generated by photon recycling method without phosphor by combining the electroluminescence ͑EL͒ lights from GaN LED with photoluminescence ͑PL͒ lights from AlGaInP MQWs through wafer-bonding. 8 Lately, a few groups have reported on the different method for white color generation demonstrating that white PL emission can be obtained from laterally connected MQWs on three dimensional GaN templates grown by epitaxial lateral overgrowth ͑ELOG͒. [9][10][11] The white color PL emission was achieved by mixing PL emissions from InGaN QWs grown on triangular ELOG GaN films 9 and MQWs grown on trapezoidal GaN.…”

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confidence: 99%

In Ga N ∕ Ga N multiple quantum wells grown on microfacets for white-light generation

Cho

Park

Kwon

et al. 2008

Applied Physics Letters

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We report the white color electroluminescence ͑EL͒ emission from InGaN / GaN multiple quantum wells ͑MQWs͒ grown on GaN microfacets. The white color was realized by combining EL emission from InGaN / GaN MQWs on c-plane ͑0001͒, semipolar ͕11− 22͖, and ͕1 − 101͖ microfacets of trapezoidal n-GaN arrays. The color of EL emission was changed from reddish to bluish color with injection current and showed a white color in the current range of 180-230 mA. The variation in the color of EL emission was attributed to differences in current injection and quantum efficiency of MQWs grown on c-plane ͑0001͒ and semipolar GaN microfacets.

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“…Furthermore, guided-wave structures guides light propagation direction effectively, then light is not emitted equally into all directions, but is mostly along a particular axis, therefore the low light extraction efficiency arising from internal reflection is no longer existing, WSLD can obtain nearly 100% light extraction efficiency. To increase light extraction efficiency, chips are usually shaped in special ways [8][9] , but in our design, light extraction can be much more efficient without going to the trouble of shaping the chip.…”

Section: Introductionmentioning

confidence: 99%

A novel semiconductor white light emitting diode

2005

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Semiconductor white sources used for illumination have attracted much attention because of the theoretical high electro-optical efficiency and potential huge application market. However the practical electro-optical efficiency for the white light-emitting diode (LED) is far from the theoretical predict. In this paper we propose a novel white light superluminescent diode (WSLD), which has two active layers, and double-wavelength reflection filter films are coated on the facets of the chip. With this design we can get superluminescent light emission at two peak-gain wavelengths, that is, blue light and green-yellow light, thus producing white light. It is shown that WSLD has much higher electro-optical efficiency and better performance than ordinary white LEDs. This novel WSLD will be a new way to realize high-flux and high-efficiency semiconductor white light source.

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<title>Photon recycling semiconductor light-emitting diode</title>

Cited by 26 publications

References 0 publications

Research challenges to ultra‐efficient inorganic solid‐state lighting

Research challenges to ultra‐efficient inorganic solid‐state lighting

In Ga N ∕ Ga N multiple quantum wells grown on microfacets for white-light generation

A novel semiconductor white light emitting diode

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