Výsledky vyhledávání - "Hyeonghwa Yu"

Significant enhancement in quantum-dot light emitting device stability via a ZnO:polyethylenimine mixture in the electron transport layer

Autor: Tyler Davidson-Hall, Fatemeh Samaeifar, Peter Chun, Hyeonghwa Yu, Hany Aziz, Giovanni Cotella, Quan Lyu, Dong Seob Chung

Publikováno v: Nanoscale Advances. 3:5900-5907

The effect of adding polyethylenimine (PEI) into the ZnO electron transport layer (ETL) of inverted quantum dot (QD) light emitting devices (QDLEDs) to form a blended ZnO:PEI ETL instead of using it in a separate layer in a bilayer ZnO/PEI ETL is inv

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::45f7dbfa2ef23d71aabd5a0ae2618440
https://doi.org/10.1039/d1na00561h

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Differences in Photoluminescence Stability and Host-to-Guest Energy Transfer in Solution-Coated Versus Vacuum-Deposited Electroluminescent Host:Guest Small-Molecule Materials

Autor: Hany Aziz, Hyeonghwa Yu

Publikováno v: The Journal of Physical Chemistry C. 124:11701-11707

The root causes of the lower stability of electroluminescent host:guest (H:G) small-molecule materials commonly used in organic light-emitting devices (OLEDs), when made by solution-coating, are in...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1bc7e6cc161f92c17cc66e245a58baba
https://doi.org/10.1021/acs.jpcc.0c01968

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Significant enhancement in quantum-dot light emitting device stability

Autor: Dong Seob, Chung, Tyler, Davidson-Hall, Hyeonghwa, Yu, Fatemeh, Samaeifar, Peter, Chun, Quan, Lyu, Giovanni, Cotella, Hany, Aziz

Publikováno v: Nanoscale advances. 3(20)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::b19be133450826de835d7e50d13085c6
https://pubmed.ncbi.nlm.nih.gov/36132666

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Direct Observation of Exciton-Induced Molecular Aggregation in Organic Small-Molecule Electroluminescent Materials

Autor: Hany Aziz, Hyeonghwa Yu

Publikováno v: The Journal of Physical Chemistry C. 123:16424-16429

Recent studies have suggested that exciton stress can lead to molecular aggregation in organic luminescent materials and that the phenomenon plays a leading role in the deterioration in organic lig...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2283bdd8b62c46e07c0b435a4497bb13
https://doi.org/10.1021/acs.jpcc.9b03364

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Photonics made to order: reverse micelle templating as a universal approach to functional nanoparticles

Autor: Kunyu Liang, HyeongHwa Yu, Greg Hanta, Matt Bumstead, Pedro Oliveria, Lok Shu Hui, Ayse Turak, Amr Awad Ibrahim, Muhammad Bilal Munir, Ramis Arbi

Publikováno v: 2021 Photonics North (PN).

A brief overview of reverse micelle templating as a universal route to solution processed nanoparticles for optical, optoelectronic and photonic applications. Understanding salt complexation, micellar stability, and nanoparticle spatial distribution

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0fc8486be8a35af5a8e47f2e64e3680a
https://doi.org/10.1109/pn52152.2021.9597948

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Multifunctional Dithiadiazolyl Radicals: Fluorescence, Electroluminescence, and Photoconducting Behavior in Pyren-1′-yl-dithiadiazolyl

Autor: Christos P. Constantinides, Daiki Tonouchi, Hany Aziz, Keitaro Eguchi, Yassine Beldjoudi, Jeremy M. Rawson, Mitchell A. Nascimento, Michio M. Matsushita, Hyeonghwa Yu, Igor O. Osorio-Román, Yong Joo Cho, Kunio Awaga

Publikováno v: Journal of the American Chemical Society. 140:6260-6270

The pyren-1′-yl-functionalized dithiadiazolyl (DTDA) radical, C16H9CNSSN (1), is monomeric in solution and exhibits fluorescence in the deep-blue region of the visible spectrum (440 nm) upon excitation at 241 nm. The salt [1][GaCl4] exhibits simila

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::894b71f9ab35517c1640d0b6270a9f53
https://doi.org/10.1021/jacs.7b12592

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Exciton-Induced Degradation of Carbazole-Based Host Materials and Its Role in the Electroluminescence Spectral Changes in Phosphorescent Organic Light Emitting Devices with Electrical Aging

Autor: Hany Aziz, Yingjie Zhang, Yong Joo Cho, Hyeonghwa Yu

Publikováno v: ACS Applied Materials & Interfaces. 9:14145-14152

We investigate the origins of the long-wavelength bands that appear in the emission spectra of carbazole-based host materials and play a role in the electroluminescence (EL) spectral changes of phosphorescent organic light emitting devices (PhOLEDs)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c58e0e99d13d20784f619478c7e10f6
https://doi.org/10.1021/acsami.7b01432

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Influence of deposition rate on hole transport layer morphology and its effect on the electroluminescence stability of phosphorescent organic light emitting devices

Autor: Hany Aziz, Hyeonghwa Yu

Publikováno v: Organic and Hybrid Light Emitting Materials and Devices XXIII.

Material deposition rate during device fabrication is known to influence film morphology. Using the archetypical phosphorescent organic light-emitting devices (PhOLED) hole transport material 4,4′-Bis(carbazol-9-yl)biphenyl, the influence of the de

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8686b8be1063b5be2d1ce0b0fd7f7bd7
https://doi.org/10.1117/12.2529653

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