Browsing by Keywords "Colloidal quantum wells"
Now showing items 1-20 of 24
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Colloidal optoelectronics of self-assembled quantum well superstructures
(Bilkent University, 2020-06)Advances in the colloidal nanocrystal synthesis enabled creation of quasi twodimensional colloidal quantum wells (CQWs) in the last decade. These CQWs possess similar properties to those of epitaxially grown quantum wells ... -
Colloidal synthesis and doping of semiconductor nanocrystals
(Bilkent University, 2015-07)Colloidal semiconductor nanocrystals have drawn great interest for application areas in photonics and optoelectronics thanks to their superior optical properties including strong bandgap emission and tunability. Also, ... -
Emerging fields of colloidal nanophotonics for quality lighting to versatile lasing
(Springer Verlag, 2018)Solution-processed semiconductor nanocrystals have attracted increasingly greater interest in optoelectronics including color conversion and enrichment in quality lighting and display backlighting. Optical properties of ... -
Giant modal gain coefficients in colloidal II–VI nanoplatelets
(American Chemical Society, 2019)Modal gain coefficient is a key figure of merit for a laser material. Previously, net modal gain coefficients larger than a few thousand cm–1 were achieved in II–VI and III–V semiconductor gain media, but this required ... -
High-efficiency optical gain in type-II semiconductor nanocrystals of alloyed colloidal quantum wells
(American Chemical Society, 2017)Colloidal nanocrystals having controlled size, tailored shape, and tuned composition have been explored for optical gain and lasing. Among these, nanocrystals having Type-II electronic structure have been introduced toward ... -
Lateral size-dependent spontaneous and stimulated emission properties in colloidal CdSe nanoplatelets
(American Chemical Society, 2015)Here, we systematically investigated the spontaneous and stimulated emission performances of solution-processed atomically flat quasi-2D nanoplatelets (NPLs) as a function of their lateral size using colloidal CdSe core ... -
Light-Emitting diodes with Cu-Doped colloidal quantum wells: from ultrapure green, tunable dual-emission to white light
(WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2019)Copper‐doped colloidal quantum wells (Cu‐CQWs) are considered a new class of optoelectronic materials. To date, the electroluminescence (EL) property of Cu‐CQWs has not been revealed. Additionally, it is desirable to achieve ... -
Low-threshold lasing from copper-doped CdSe colloidal quantum wells
(Wiley, 2021-05-04)Transition metal doped colloidal nanomaterials (TMDCNMs) have recently attracted attention as promising nano-emitters due to dopant-induced properties. However, despite ample investigations on the steady-state and dynamic ... -
Low-threshold optical gain and lasing of colloidal nanoplatelets
(IEEE, 2014-10)Semiconductor nanocrystals, which are also known as colloidal quantum dots (CQDs), are highly attractive materials for high performance optoelectronic device applications such as lasers. With their size, shape and composition ... -
Modulating emission properties in a host–guest colloidal quantum well superlattice
(Wiley-VCH Verlag GmbH & Co. KGaA, 2021-12-19)Self-assembly of colloidal nanocrystals into ordered superlattices is a powerful approach to enable novel collective properties which are not available in individual colloids. However, to date, it remains a major challenge ... -
Near-Infrared-Emitting five-monolayer thick copper-doped CdSe nanoplatelets
(WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2019)Doped nanocrystals are instrumental to the high‐performance luminescent solar concentrators (LSCs) and the color conversion devices. Recently, copper (Cu)‐doped three and four monolayer (ML) thick CdSe nanoplatelets (NPLs) ... -
Near-unity emitting copper-doped colloidal semiconductor quantum wells for luminescent solar concentrators
(Wiley-VCH Verlag, 2017)Doping of bulk semiconductors has revealed widespread success in optoelectronic applications. In the past few decades, substantial effort has been engaged for doping at the nanoscale. Recently, doped colloidal quantum dots ... -
Nonradiative energy transfer in colloidal CdSe nanoplatelet films
(Royal Society of Chemistry, 2015)Nonradiative energy transfer (NRET) has been extensively studied in colloidal nanocrystal (quantum dots) and nanorod (quantum wires) assemblies. In this work, we present the first account of spectroscopic evidence of NRET ... -
Optical gain in ultrathin self‐assembled bi‐layers of colloidal quantum wells enabled by the mode confinement in their high‐index dielectric waveguides
(Wiley-VCH Verlag, 2020)This study demonstrates an ultra‐thin colloidal gain medium consisting of bi‐layers of colloidal quantum wells (CQWs) with a total film thickness of 14 nm integrated with high‐index dielectrics. To achieve optical gain ... -
Physics of nonradiative energy transfer in the complex media of 0D, 2D and 3D materials
(Bilkent University, 2016-07)Quantum-confined colloidal nanostructures with strong excitonic properties have emerged as promising light harvesting components in photonics and optoelectronics over the past 20 years. With their favorable photophysical ... -
Record high external quantum efficiency of 19.2% achieved in light-emitting diodes of colloidal quantum wells enabled by hot-Injection shell growth
(WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2020)Colloidal quantum wells (CQWs) are regarded as a highly promising class of optoelectronic materials, thanks to their unique excitonic characteristics of high extinction coefficients and ultranarrow emission bandwidths. ... -
Self-resonant microlasers of colloidal quantum wells constructed by direct deep patterning
(American Chemical Society, 2021-06-09)Here, the first account of self-resonant fully colloidal μ-lasers made from colloidal quantum well (CQW) solution is reported. A deep patterning technique is developed to fabricate well-defined high aspect-ratio on-chip ... -
Semiconductor nanoplatelet heterostructures enhanced via combinations of colloidal atomic layer deposition and hot injection shell growths
(Bilkent University, 2019-07)One of the most promising families of semiconductor nanocrystals in colloidal optoelectronics and nanophotonics is considered to be colloidal quantum wells, also commonly referred to as nanoplatelets (NPLs). Possessing ... -
Stacking in colloidal nanoplatelets: tuning excitonic properties
(American Chemical Society, 2014)Colloidal semiconductor quantum wells, also commonly known as nanoplatelets (NPLs), have arisen among the most promising materials for light generation and harvesting applications. Recently, NPLs have been found to assemble ... -
Strong plasmon-wannier mott exciton interaction with high aspect ratio colloidal quantum wells
(Cell Press, 2020)The strong interaction between excitons and plasmons, manifested as Rabi splitting of the eigen energies, is of fundamental interest for manipulating photons in nanoscale devices. Thanks to their enhanced photostability ...
