Processing and characterization of monodisperse phosphine-free CdSe colloidal quantum dots

2014 ◽  
Author(s):  
Hadi Maghsoudi ◽  
Melika Mahboub ◽  
Sirous Asgari
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots

Quantum Dots Clusters as Self-Assembled Antennae with Phycocyanine and Phycobilisomes as Energy Acceptors

2021 ◽  
Author(s):  
Joanna M. Grzyb ◽  
Katarzyna Walczewska-Szewc ◽  
Jakub Sławski ◽  
Martyna Trojnar
Keyword(s):  
Quantum Dots ◽  
Monte Carlo ◽  
Colloidal Quantum Dots ◽  
Self Assembled

In this study, we investigated an experimental and Monte-Carlo computational characterization of self-assembled antennae built of CdTe colloidal quantum dots (QDs). These clusters provide efficient excitation of phycocyanine (PC) or...

PbSe/CdSe Thin-Shell Colloidal Quantum Dots

2015 ◽  
Vol 229 (1-2) ◽  
Author(s):  
Gary Zaiats ◽  
Diana Yanover ◽  
Roman Vaxenburg ◽  
Arthur Shapiro ◽  
Aron Safran ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cation Exchange ◽  
Thin Shell ◽  
Optical Characterization ◽  
Colloidal Quantum Dots

AbstractThe present work describes the structural and optical characterization of PbSe and PbSe/CdSe colloidal quantum dots (CQDs), the latter being produced by cation exchange of Pb

Synthesis and Characterization of Large PbSe Colloidal Quantum Dots

2021 ◽  
pp. 2000285
Author(s):  
Witold Palosz ◽  
Sudhir Trivedi ◽  
Eric DeCuir ◽  
Priyalal S. Wijewarnasuriya ◽  
Susanna M. Thon ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Synthesis And Characterization

scholarly journals Nonlinear Optical Characterization of InP@ZnS Core-Shell Colloidal Quantum Dots Using 532 nm, 10 ns Pulses

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1366
Author(s):  
Rashid A. Ganeev ◽  
Andrey I. Zvyagin ◽  
Ivan A. Shuklov ◽  
Maksim G. Spirin ◽  
Oleg V. Ovchinnikov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nonlinear Refraction ◽  
Colloidal Quantum Dots ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Core Shell ◽  
Nonlinear Scattering ◽  
532 Nm

InP@ZnS core-shell colloidal quantum dots (CQDs) were synthesized and characterized using the z-scan technique. The nonlinear refraction and nonlinear absorption coefficients (γ = −2 × 10−12 cm2 W−1, β = 4 × 10−8 cm W−1) of these CQDs were determined using 10 ns, 532 nm pulses. The saturable absorption (β = −1.4 × 10−9 cm W−1, Isat = 3.7 × 108 W cm−2) in the 3.5 nm CQDs dominated at small intensities of the probe pulses (I ≤ 7 × 107 W cm−2) followed by reverse saturable absorption at higher laser intensities. We report the optical limiting studies using these CQDs showing the suppression of propagated nanosecond radiation in the intensity range of 8 × 107–2 × 109 W cm−2. The role of nonlinear scattering is considered using off-axis z-scan scheme, which demonstrated the insignificant role of this process along the whole range of used intensities of 532 nm pulses. We discuss the thermal nature of the negative nonlinear refraction in the studied species.

Synthesis and characterization of InP and InN colloidal quantum dots

2005 ◽  
Author(s):  
Melissa R. Greenberg ◽  
Weiliang Chen ◽  
Ben N. Pulford ◽  
Gennady A. Smolyakov ◽  
Ying-Bing Jiang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Synthesis And Characterization

A Short Analysis on the Morphological Characterization of Colloidal Quantum Dots for Photovoltaic Applications

2020 ◽  
Vol 16 (4) ◽  
pp. 544-555
Author(s):  
Mansoor Ani Najeeb ◽  
Zubair Ahmad ◽  
Sarkarainadar Balamurugan ◽  
Khaulah Sulaiman ◽  
R.A. Shakoor
Keyword(s):  
Quantum Dots ◽  
Low Cost ◽  
Quantum Confinement Effect ◽  
Solar Spectrum ◽  
Morphological Characterization ◽  
Colloidal Quantum Dots ◽  
Morphological Studies ◽  
Photovoltaic Applications ◽  
Future Work

Due to its various advantages, colloidal quantum dots (CQDs) carry a prodigious deal of interest in low-cost photovoltaics. The possibility of tailored band gaps via quantum confinement effect facilitates photovoltaic devices to be tuned to allow their optical absorption bandwidths to match with the solar spectrum. Size, shape, and material composition are some of the significant factors which affect the optical and electronic properties of QDs. Scanning Electron Microscope (SEM), Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM) are some of the most resourceful methods available for the microstructural characteristics of solid materials. These techniques can provide useful information about the structural, morphological and compositional properties of the specimen. In this focused review, we analyze the several types of QDs, their synthesis and characterization, exclusively morphological studies carried out on quantum dots for solar cell applications. Despite various advantages and techniques used for morphological characterization of QDs, very few reviews are reported in the past years. In this review, we have compiled the important and latest findings published on morphological analysis of QDs for photovoltaic applications which can provide the guideline for the research for the future work in the field.

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