Cascade luminescence as a way to increase the energy efficiency of cathodoluminophores

Ozol, Dmitry I.

doi:10.1109/ivnc.2016.7551487

Cited by 3 publications

(1 citation statement)

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“…This coefficient is the ratio between the average energy required to create one electron-hole pair and the band gap energy, and is generally taken as β 3 [1], which sets an upper limit of 33% to the WPE. It has been shown that β3 for direct-band-gap materials where the effective masses of electron (m e ) and hole (m h ) are approximately equal, but theoretical calculations predict lower values β 1.5-2 in wide band gap materials with m h > m e [12,13].…”

Section: Efficiencymentioning

confidence: 99%

Electron beam pumped light emitting devices

Cuesta¹,

Harikumar²,

Monroy³

2022

J. Phys. D: Appl. Phys.

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Electron beam pumping is a promising technique to fabricate compact and efficient light emitters (lamps or lasers) in those spectral ranges where electrical injection is problematic due doping, transport and contacting issues. Interest in this technology has increased in recent years, particularly driven by the demand for ultraviolet sources and the difficulties in developing efficient AlGaN devices to cover the spectral range of 220-350 nm. The use of a highly energetic electron beam enables the semiconductor structure to be pumped without the need for doping or contacting. The active volume is defined by the accelerating voltage, which allows the homogeneous excitation of a large active volume. The efficiency of cathodoluminescent lamps can compete and even outperform LEDs in the deep ultraviolet window, and lasers can deliver high optical power (up to around 100 W). Here, we analyze the advantages and challenges of this technology platform, and discuss its potential applications.

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Section: Efficiencymentioning

confidence: 99%