Escalating opportunities in the field of lighting

Chitnis, Dipti; Kalyani, N. Thejo; Swart, H.C.; Dhoble, S.J.

doi:10.1016/j.rser.2016.06.041

Cited by 46 publications

(23 citation statements)

References 92 publications

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“…Glares from lighting fixtures, by changing lateral angles, may also be physically corrected. However, by using LED lighting, this trial and error method can be avoided [53]. Glares are unnecessary lighting characteristics in a healthcare setup, as they can prevent medical practitioners from making an accurate diagnosis.…”

Section: Visual Glare Reduction In Led Lightingmentioning

confidence: 99%

Addressing Visual Comfort Issues in Healthcare Facilities Using LED Lighting Technology - A Review on Daylighting Importance, Impact of Correlated Colour Temperature, Human Responses and Other Visual Comfort Parameters

Perumal

Baharum

Nawi

2021

ARFMTS

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In the field of lighting technology, the choice of lighting has shifted from conventional incandescent and fluorescent to LED (Light Emitting Dode) lighting. Many businesses have yet to take full advantage of LED lighting technologies to address visual comfort problems for occupants. The current focus of installations and retrofitting jobs is only on dollar returns and energy-saving measures. By defining a range of vulnerabilities and discrepancies, this paper reviews the typical criteria affecting occupant visual comfort and shifts gear into those that are fundamental to healthcare setup. Issues such as the importance of daylight introduction into hospital wards and the benefits of choosing correct correlated colour temperature are discussed, among others discomforts. LED lighting technology has advanced immensely by offering flexibility to build a lighting system that meets the environmental requirements of the end-user. Lighting technology and approach are shifting to a new paradigm by focusing not only on vision but also human psychophysical wellbeing in interior spaces. A balance must exist between energy efficiency and visual comfort factors.

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Section: Visual Glare Reduction In Led Lightingmentioning

confidence: 99%

Addressing Visual Comfort Issues in Healthcare Facilities Using LED Lighting Technology - A Review on Daylighting Importance, Impact of Correlated Colour Temperature, Human Responses and Other Visual Comfort Parameters

Perumal

Baharum

Nawi

2021

ARFMTS

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“…The reduction of the light source in wLEDs has specifically limited the amount of materials required as well as the size of the optical system. It took only a few more years to improve the quality of their emission and lifetime, while drastically lowering their price [3][4][5], which resulted in the recognition of their technological and environmental superiority [6]. Recent studies on the implementation of dimmable wLED luminaires have shown a 26% reduction in energy consumption for indoor lighting [7], as well as a 31-60 % reduction by replacing high-pressure sodium for outdoor lighting, which has mainly been attributed to the ease of dimming control including static and dynamic modes [8].…”

Section: Introductionmentioning

confidence: 99%

Potential substitutes for critical materials in white LEDs: Technological challenges and market opportunities

Gaffuri¹,

Stolyarova²,

Llerena³

et al. 2021

Renewable and Sustainable Energy Reviews

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…The advantages that organic light-emitting diode (OLED)-based technologies offer in terms of brightness, viewing angle, contrast ratio, production cost, opportunity for flexible displays, etc. are not rivaled by liquid crystal-based displays [ 1 , 2 , 3 ]. It is well established that multilayer devices comprising hole transport layer (HTL), electron transport layer, and emissive layer are necessary for efficient light emission [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

New Electroactive Polymers with Electronically Isolated 4,7-Diarylfluorene Chromophores as Positive Charge Transporting Layer Materials for OLEDs

et al. 2021

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A group of polyethers containing electroactive pendent 4,7-diarylfluorene chromophores have been prepared by the multi-step synthetic route. Full characterization of their structures has been presented. The polymeric materials represent derivatives of high thermal stability with initial thermal degradation temperatures in a range of 392–397 °C. Glass transition temperatures of the amorphous polymers range from 28 °C to 63 °C and depend on structures of the 4,7-diarylfluorene chromophores. Electron photoemission spectra of thin layers of the electroactive derivatives showed ionization potentials in the range of 5.8–6.0 eV. Hole injecting/transporting properties of the prepared polymeric materials were confirmed during formation of organic light-emitting diodes with tris(quinolin-8-olato)aluminium (Alq3) as a green emitter, which also serves as an electron transporting layer. The device using hole-transporting polymer with electronically isolated 2,7-di(4-biphenyl)fluorene chromophores demonstrated the best overall performance with low turn on voltage of 3 V, high current efficiency exceeding 1.7 cd/A, and with maximum brightness over 200 cd/m2. The organic light-emitting diode (OLED) characteristics were measured in non-optimized test devices. The efficiencies could be further improved by an optimization of device structure, formation conditions, and encapsulation of the devices.

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Escalating opportunities in the field of lighting

Cited by 46 publications

References 92 publications

Addressing Visual Comfort Issues in Healthcare Facilities Using LED Lighting Technology - A Review on Daylighting Importance, Impact of Correlated Colour Temperature, Human Responses and Other Visual Comfort Parameters

Addressing Visual Comfort Issues in Healthcare Facilities Using LED Lighting Technology - A Review on Daylighting Importance, Impact of Correlated Colour Temperature, Human Responses and Other Visual Comfort Parameters

Potential substitutes for critical materials in white LEDs: Technological challenges and market opportunities

New Electroactive Polymers with Electronically Isolated 4,7-Diarylfluorene Chromophores as Positive Charge Transporting Layer Materials for OLEDs

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