Browsing by Author "Gao, Y."

Observation of polarized gain from aligned colloidal nanorods

Gao, Y.; Ta, V. D.; Zhao, X.; Wang Y.; Chen R.; Mutlugün, E.; Fong, K. E.; Tan S.T.; Dang C.; Sun, X. W.; Sun, H.; Demir, Hilmi Volkan (Royal Society of Chemistry, 2015)

In recent years, colloidal semiconductor nanorods have attracted great interest for polarized spontaneous emission. However, their polarized gain has not been possible to achieve so far. In this work we show the highly ...

Quantum dot light-emitting diode with quantum dots inside the hole transporting layers

Leck K.S.; Divayana, Y.; Zhao, D.; Young, X.; Abiyasa, A. P.; Mutlugun, E.; Gao, Y.; Liu, S.; Tan S.T.; Sun, X. W.; Demir, Hilmi Volkan (American Chemical Society, 2013)

We report a hybrid, quantum dot (QD)-based, organic light-emitting diode architecture using a noninverted structure with the QDs sandwiched between hole transporting layers (HTLs) outperforming the reference device structure ...

Quantum dots on vertically aligned gold nanorod monolayer: plasmon enhanced fluorescence

Peng, B.; Li, Z.; Mutlugun, E.; Martinez, P. L. H.; Li, D.; Zhang, Q.; Gao, Y.; Demir, Hilmi Volkan; Xiong, Q. (Royal Society of Chemistry, 2014)

CTAB-coated Au nanorods were directly self-assembled into a vertically aligned monolayer with highly uniform hot spots through a simple but robust approach. By coupling with CdSe/ZnS quantum dots, a maximum enhancement of ...

Solution Processed Tungsten Oxide Interfacial Layer for Efficient Hole-Injection in Quantum Dot Light-Emitting Diodes

Yang, X.; Mutlugun, E.; Zhao, Y.; Gao, Y.; Leck, K. S.; Ma, Y.; Ke, L.; Tan, S. T.; Demir, Hilmi Volkan; Sun, X. W. (Wiley-VCH Verlag, 2014)

A highly efficient and stable QLED using an inorganic WO3 nanoparticle film as a hole injection layer is demonstrated.The resulting WO3 nanoparticle-based QLEDs also exhibit superior performance compared to that of the ...

Stimulated emission and lasing from CdSe/CdS/ZnS core-multi-shell quantum dots by simultaneous three-photon absorption

Wang Y.; Ta, V. D.; Gao, Y.; He, T. C.; Chen R.; Mutlugun, E.; Demir, Hilmi Volkan; Sun, H. D. (Wiley - V C H Verlag GmbH, 2014)

Three-photon pumped stimulated emission and coherent random lasing from colloidal CdSe/CdS/ZnS core-multishell quantum dots are achieved for the first time. These results can offer new possibilities in biology and photonics, ...

Transition metal oxides on organic semiconductors

Zhao Y.; Zhang, J.; Liu, S.; Gao, Y.; Yang, X.; Leck K.S.; Abiyasa, A. P.; Divayana, Y.; Mutlugun, E.; Tan S.T.; Xiong, Q.; Demir, Hilmi Volkan; Sun, X. W. (Elsevier BV, 2014-04)

Transition metal oxides (TMOs) on organic semiconductors (OSs) structure has been widely used in inverted organic optoelectronic devices, including inverted organic light-emitting diodes (OLEDs) and inverted organic solar ...

Unraveling the ultralow threshold stimulated emission from CdZnS/ZnS quantum dot and enabling high ‐ Q microlasers

Wang Y.; Fong, K. E.; Yang, S.; Ta, V.; Gao, Y.; Wang, Z.; Nalla, V.; Demir, Hilmi Volkan; Sun, H. (Wiley-VCH Verlag, 2015)

The newly engineered ternary CdZnS/ZnS colloidal quantum dots (CQDs) are found to exhibit remarkably high photoluminescence quantum yield and excellent optical gain properties. However, the underlying mechanisms, which ...

Unusual fluorescent properties of stilbene units and cdzns/zns quantum dots nanocomposites: white-light emission in solution versus light-harvesting in films

He T.; Gao, Y.; Gao, y.; Lin, X.; Chen R.; Hu, W.; Zhao, X.; Wang Y.; Demir, Hilmi Volkan; Fan, Q.; Grimsdale, A. C.; Sun, H. (Wiley - V C H Verlag GmbH & Co. KGaA, 2016)

Nanocomposites with organic–inorganic properties represent a new fi eld of basic research and offer prospects for many novel applications in extremely diverse fi elds, due to their remarkable emerging new properties and ...

A variable structure control approach to active queue management for TCP with ECN

Yan, P.; Gao, Y.; Özbay, Hitay (Institute of Electrical and Electronics Engineers, 2005)

It has been shown that the transmission control protocol (TCP) connections through the congested routers can be modeled as a feedback dynamic system. In this paper we design a variable structure (VS) based control scheme ...

Variable structure control in active queue management for TCP with ECN

Yan, P.; Gao, Y.; Özbay, Hitay (IEEE, 2003)

It has been shown that the TCP connections through the congested routers can be modeled as a feedback dynamic system. In this paper, we design a variable structure (VS) based control scheme in active queue management (AQM) ...