High-efficiency high-quality street lighting with colloidal quantum dot nanophosphors

Date

2015-01-01

Author

ERDEM, TALHA
Keleştemur, Yusuf
Soran-Erdem, Zeliha
Ji, Yun
Demir, Hilmi Volkan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

128
views

0
downloads

We present the fIrst photometric study of white light-emitting diodes (WLEDs) employing colloidal quantum dots specifically for street lighting. These WLEDs exhibit the largest mesopic luminance 35% higher than conventional sources, consuming 29% less energy.

URI

https://hdl.handle.net/11511/92651

DOI

https://doi.org/10.1109/ipcon.2015.7323588

Conference Name

IEEE Photonics Conference

Collections

Department of Metallurgical and Materials Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Energy-saving quality road lighting with colloidal quantum dot nanophosphors Erdem, Talha; Keleştemur, Yusuf; SORAN ERDEM, ZELİHA; Ji, Yun; Demir, Hilmi Volkan (2014-12-01) Here the first photometric study of road-lighting white light-emitting diodes (WLEDs) integrated with semiconductor colloidal quantum dots (QDs) is reported enabling higher luminance than conventional light sources, specifically in mesopic vision regimes essential to street lighting. Investigating over 100 million designs uncovers that quality road-lighting QD-WLEDs, with a color quality scale and color rendering index >= 85, enables 13-35% higher mesopic luminance than the sources commonly used in street l...
Highly Stable Multicrown Heterostructures of Type-II Nanoplatelets for Ultralow Threshold Optical Gain Dede, Didem; Taghipour, Nima; Quliyeva, Ulviyya; Sak, Mustafa; Keleştemur, Yusuf; Gungor, Kivanc; Demir, Hilmi Volkan (2019-03-01) Solution-processed type-II quantum wells exhibit outstanding optical properties, which make them promising candidates for light-generating applications including lasers and LEDs. However, they may suffer from poor colloidal stability under ambient conditions and show strong tendency to assemble into face-to-face stacks. In this work, to resolve the colloidal stability and uncontrolled stacking issues, we proposed and synthesized CdSe/CdSe1-xTex/CdS core/multicrown hetero-nanoplatelets (NPLs), controlling th...
High performance focal plane array technologies from short to long wavelength infrared bands Arslan, Yetkin; Beşikci, Cengiz; Department of Electrical and Electronics Engineering (2014) This thesis work covers the development of three different state of the art infrared sensor technologies: quantum well infrared photodetectors (QWIPs), HgCdTe sensors and extended InGaAs photodetectors. QWIP is the leading member of the quantum structure infrared photodetector family providing excellent uniformity and stability with field proven performance. The utilization of the InP/In0.48Ga0.52As multi-quantum well structure (instead of the standard AlGaAs/GaAs material system) for the implementation of ...
Nonlinear optical properties of low temperature annealed silicon-rich oxide and silicon-rich nitride materials for silicon photonics Minissale, S.; Yerci, Selçuk; Dal Negro, L. (2012-01-09) We investigate the nonlinear optical properties of Si-rich silicon oxide (SRO) and Si-rich silicon nitride (SRN) samples as a function of silicon content, annealing temperature, and excitation wavelength. Using the Z-scan technique, we measure the non-linear refractive index n(2) and the nonlinear absorption coefficient beta for a large number of samples fabricated by reactive co-sputtering. Moreover, we characterize the nonlinear optical parameters of SRN in the broad spectral region 1100-1500 nm and show ...
Magnetic Fe3O4-chitosan micro- and nanoparticles for wastewater treatment ŞAHBAZ, DENİZ AKIN; YAKAR, ARZU; Gündüz, Ufuk (2019-08-18) In this study, first, magnetic nanoparticles (MNP) were synthesized using a coprecipitation method and the synthesized particles were characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), dynamic light scattering (DLS), and vibrating sample magnetometry (VSM). According to DLS and VSM analyses results, it was seen that the size of the MNP was smaller than 10 nm and they exhibited superparamagnetic properties, respectively. Then, magnetic Fe3O4-chitosan micro/n...

Citation Formats

T. ERDEM, Y. Keleştemur, Z. Soran-Erdem, Y. Ji, and H. V. Demir, “High-efficiency high-quality street lighting with colloidal quantum dot nanophosphors,” presented at the IEEE Photonics Conference, Preston, İngiltere, 2015, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/92651.