On the determination of absorption cross section of colloidal lead halide perovskite quantum dots

2019 ◽  
Vol 151 (15) ◽  
pp. 154706 ◽  
Author(s):  
Joseph Puthenpurayil ◽  
Oscar Hsu-Cheng Cheng ◽  
Tian Qiao ◽  
Daniel Rossi ◽  
Dong Hee Son
Keyword(s):  
Quantum Dots ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Absorption Cross ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite ◽  
Colloidal Lead ◽  
Lead Halide

Polysalt ligands achieve higher quantum yield and improved colloidal stability for CsPbBr3 quantum dots

Nanoscale ◽  
2021 ◽  
Author(s):  
Sisi Wang ◽  
Liang Du ◽  
Selin Donmez ◽  
Yan Xin ◽  
Hedi Mattoussi
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Colloidal Stability ◽  
Semiconductor Nanocrystals ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite ◽  
Colloidal Lead ◽  
Optoelectronic Applications ◽  
Cspbbr3 Quantum Dots ◽  
Lead Halide

Colloidal lead halide perovskite quantum dots (PQDs) are relatively new semiconductor nanocrystals with great potential for use in optoelectronic applications.

scholarly journals Coherent single-photon emission from colloidal lead halide perovskite quantum dots

Science ◽  
2019 ◽  
Vol 363 (6431) ◽  
pp. 1068-1072 ◽  
Author(s):  
Hendrik Utzat ◽  
Weiwei Sun ◽  
Alexander E. K. Kaplan ◽  
Franziska Krieg ◽  
Matthias Ginterseder ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Single Photon ◽  
Photon Emission ◽  
Building Blocks ◽  
Single Photon Emission ◽  
Starting Point ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite ◽  
Colloidal Lead ◽  
Lead Halide

Chemically made colloidal semiconductor quantum dots have long been proposed as scalable and color-tunable single emitters in quantum optics, but they have typically suffered from prohibitively incoherent emission. We now demonstrate that individual colloidal lead halide perovskite quantum dots (PQDs) display highly efficient single-photon emission with optical coherence times as long as 80 picoseconds, an appreciable fraction of their 210-picosecond radiative lifetimes. These measurements suggest that PQDs should be explored as building blocks in sources of indistinguishable single photons and entangled photon pairs. Our results present a starting point for the rational design of lead halide perovskite–based quantum emitters that have fast emission, wide spectral tunability, and scalable production and that benefit from the hybrid integration with nanophotonic components that has been demonstrated for colloidal materials.

Size- and Wavelength-Dependent Two-Photon Absorption Cross-Section of CsPbBr3 Perovskite Quantum Dots

2017 ◽  
Vol 8 (10) ◽  
pp. 2316-2321 ◽  
Author(s):  
Junsheng Chen ◽  
Karel Žídek ◽  
Pavel Chábera ◽  
Dongzhou Liu ◽  
Pengfei Cheng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Perovskite Quantum Dots

Burstein-Moss shift of lead halide perovskite quantum dots induced by electron injection from graphene oxide

2021 ◽  
Vol 545 ◽  
pp. 149003
Author(s):  
Shengnan Ni ◽  
Haijun Qin ◽  
Jianfeng Wen ◽  
Xinyu Li ◽  
Ming Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Electron Injection ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite ◽  
Lead Halide

Heterogeneous Post-Passivation of Inorganic Cesium Lead Halide Perovskite Quantum Dots for Efficient Electroluminescent Devices

2021 ◽  
Author(s):  
Xuefei Li ◽  
Qingqing Yang ◽  
Liuqing Yang ◽  
Shumeng Wang ◽  
Junqiao Ding ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electroluminescent Devices ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite ◽  
Lead Halide

A heterogeneous post-passivation has been demonstrated by using formamidiniu bromide (FABr) to compensate the surface bromo vacancy of inorganic cesium lead halide perovskite quantum dots (QDs). Benefitting from its limited...

Thermally Stable Copper(II)-Doped Cesium Lead Halide Perovskite Quantum Dots with Strong Blue Emission

2019 ◽  
Vol 10 (5) ◽  
pp. 943-952 ◽  
Author(s):  
Chenghao Bi ◽  
Shixun Wang ◽  
Qiang Li ◽  
Stephen V. Kershaw ◽  
Jianjun Tian ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Blue Emission ◽  
Thermally Stable ◽  
Perovskite Quantum Dots ◽  
Strong Blue Emission ◽  
Halide Perovskite ◽  
Lead Halide

Amine-Free Synthesis of Cesium Lead Halide Perovskite Quantum Dots for Efficient Light-Emitting Diodes

2016 ◽  
Vol 26 (47) ◽  
pp. 8757-8763 ◽  
Author(s):  
Emre Yassitepe ◽  
Zhenyu Yang ◽  
Oleksandr Voznyy ◽  
Younghoon Kim ◽  
Grant Walters ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite ◽  
Lead Halide

scholarly journals Experimental Determination of the Absorption Cross-Section and Molar Extinction Coefficient of Colloidal CdSe Nanoplatelets

2015 ◽  
Vol 119 (47) ◽  
pp. 26768-26775 ◽  
Author(s):  
Aydan Yeltik ◽  
Savas Delikanli ◽  
Murat Olutas ◽  
Yusuf Kelestemur ◽  
Burak Guzelturk ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Cross Section ◽  
Extinction Coefficient ◽  
Absorption Cross Section ◽  
Molar Extinction Coefficient ◽  
Absorption Cross

scholarly journals Determination of the absorption cross-sections of higher order iodine oxides at 355 nm and 532 nm

2020 ◽  
Author(s):  
Thomas R. Lewis ◽  
Juan Carlos Gómez Martin ◽  
Mark A. Blitz ◽  
Carlos A. Cuevas ◽  
John M. C. Plane ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Atmospheric Chemistry ◽  
Absorption Cross Section ◽  
Absorption Cross ◽  
Time Resolved ◽  
Flight Mass Spectrometry ◽  
Iodine Oxides ◽  
Photo Ionization

Abstract. Iodine oxides (IxOy) play an important role in the atmospheric chemistry of iodine. They are initiators of new particle formation events in the coastal and polar boundary layer and act as iodine reservoirs in tropospheric ozone-depleting chemical cycles. Despite the importance of the aforementioned processes, the photochemistry of these molecules has not been studied in detail previously. Here, we report the first determination of the absorption cross sections of IxOy, x = 2, 3, 5, y = 1–12 at λ = 355 nm by combining pulsed laser photolysis of I2/O3 gas mixtures in air with time-resolved photo-ionization time-of-flight mass spectrometry, using NO2 actinometry for signal calibration. The oxides selected for absorption cross section determinations are those presenting the strongest signals in the mass spectra, where signals containing 4 iodine atoms are absent. The method is validated by measuring the absorption cross section of IO at 355 nm, σ355 nm, IO = (1.2 ± 0.1) ×  10–18 cm2, which is found to be in good agreement with the most recent literature. The results obtained are: σ355 nm, I2O3 

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