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Mn2+-doped CdSe/CdS core/multishell colloidal quantum wells enabling tunable carrier-dopant exchange interactions

Delikanlı, S.; Akgül, M. Z.; Murphy, J. R.; Barman, B.; Tsai, Y.; Scrace, T.; Zhang, P.; Bozok, B.; Hernández-Martínez, P.L.; Christodoulides, J.; Cartwright, A. N.; Petrou, A.; Demir, Hilmi Volkan (American Chemical Society, 2015)

In this work, we report the manifestations of carrier-dopant exchange interactions in colloidal Mn2+-doped CdSe/CdS core/multishell quantum wells. The carrier-magnetic ion exchange interaction effects are tunable through ...

High-efficiency light-emitting diodes of organometal halide perovskite amorphous nanoparticles

Xing, J.; Yan, F.; Zhao Y.; Chen, S.; Yu, H.; Zhang, Q.; Zeng, R.; Demir, Hilmi Volkan; Sun, X.; Huan, A.; Xiong, Q. (American Chemical Society, 2016)

Organometal halide perovskite has recently emerged as a very promising family of materials with augmented performance in electronic and optoelectronic applications including photovoltaic devices, photodetectors, and ...

Colloidal nanoplatelet/conducting polymer hybrids: excitonic and material properties

Guzelturk, B.; Menk, F.; Philipps, K.; Kelestemur Y.; Olutas M.; Zentel, R.; Demir, Hilmi Volkan (American Chemical Society, 2016)

Here we present the first account of conductive polymer/colloidal nanoplatelet hybrids. For this, we developed DEH-PPV-based polymers with two different anchor groups (sulfide and amine) acting as surfactants for CdSe ...

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 ...

Time-resolved photoluminescence study of CdSe/CdMnS/CdS core/multi-shell nanoplatelets

Murphy, J. R.; Delikanli S.; Scrace, T.; Zhang, P.; Norden, T.; Thomay, T.; Cartwright, A. N.; Demir, Hilmi Volkan; Petrou, A. (American Institute of Physics Inc., 2016)

We used photoluminescence spectroscopy to resolve two emission features in CdSe/CdMnS/CdS and CdSe/CdS core/multi-shell nanoplatelet heterostructures. The photoluminescence from the magnetic sample has a positive circular ...

Electric field dependent radiative decay kinetics of polar InGaN/GaN quantum heterostructures at low fields

Sari, E.; Nizamoglu, S.; Lee, I. H.; Baek, J. H.; Demir, Hilmi Volkan (American Institute of Physics, 2009-05-29)

Electric field dependent photoluminescence decay kinetics and its radiative component are studied in polar InGaN/GaN quantum heterostructures at low fields. Under externally applied electric field lower than polarization ...

Multi-material specific, targeted self-assembly of nanocrystal emitters using genetically engineered peptides on optoelectronic microchips

Zengin, Güliş; Şeker, U. O. S.; Koç, Aslı; Mutlugün, Evren; Akyüz, Özgün; Sarı, Emre; Sarıkaya, M.; Tamerler, C.; Demir, Hilmi Volkan (IEEE, 2008-11)

We demonstrated material-specific binding of the quantum dot emitters hybridized with GEPI on multi-material patterned microchips. These proof-of-concept results open up new opportunities in nanophotonics, allowing for ...

High-quality InP/ZnS nanocrystals with high photometric performance and their application to white quantum dot light-emitting diodes

Yang, X.; Tan, S. T.; Demir, Hilmi Volkan; Sun, X. W. (IEEE, 2012)

Full visible range covering InP/ZnS core-shell nanocrystals with high photometric performance have been prepared. Making use of these nanocrystals, we demonstrate a white quantum dot LED with a high color rendering index ...

InGaN/GaN based LEDs with electroluminescence in violet, blue, and green tuned by epitaxial growth temperature

Sarı, Emre; Nizamoğlu, Sedat; Özel, Tuncay; Demir, Hilmi Volkan; İnal, Ayşe; Ülker, Erkin; Özbay, Ekmel; Dikme, Y.; Heuken, M. (IEEE, 2007)

In this work, we present a full set of InGaN LEDs based on a single optimal InGaN/GaN quantum design with emission wavelengths spanning from green to blue to violet by tuning the active layer growth temperature to precisely ...

Photonic devices and systems embedded with nanocyrstals

Demir, Hilmi Volkan; Soğancı, Ibrahim Murat; Mutlugun, Evren; Tek, Sümeyra; Huyal, Ilkem Ozge (SPIE, 2006)

We review our research work on the development of photonic devices and systems embedded with nanocyrstals for new functionality within EU Phoremost Network of Excellence on nanophotonics. Here we report on CdSe/ZnS ...