Proceedings of nanoGe September Meeting 2015 (NFM15)
Publication date: 8th June 2015
White color emission is important in both lighting and display applications, and it can be realized by electroluminescence (EL) and photoluminescence (PL). White color emission is achieved by direct emission from light emissive materials in EL, while short light source such as blue or UV is converted into green and red in PL. Colloidal semiconducting QDs have been recognized for their narrow color emission, high quantum yield (QY) and solution process-ability. Futhermore, the color quaility is eaily controlled compare to other materials with regard to CRI, color temp and color gamut as well as efficiency. In this work, white color control using quantum dot in both EL and PL application are investigated. The first approach is to control white color emission with quantum dot based single compounds in QD EL devices. White-light emitting single compounds were synthesized by grafting blue-emission fluorescent molecules onto yellow emitting CdSe/ZnS core/shell quantum dots (QDs) and white LED were demonstrated. The easy controllability of color temperature was also demonstrated from warm white (4,902 K) to cool white (10,769 K) by adjusting the weight ratio of QD to grafted molecules and QD size. Second approach is to control white color emission by converting blue emission to orange and red emission. White emission was achieved using CuInS2/ZnS QD-embedded polymer nanofibers for color conversion films on GaN blue LEDs. High CRI (>90) was achieved through QD-embedded color conversion films.Finally, short wavelength emission to long wavelength emission, Förster resonance energy transfer, is prevented by mixing two different types of QD blended polymers. 91% of Rec. 2020 color gamut was achieved by applying the blended films on the GaN blue LED which can be potentially used for ultra-high definition (UHD) displays backlights.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.