Effect of Surface Ligand on Charge Separation and Recombination at CsPbI3 Perovskite Quantum Dot/TiO2 Interfaces

2019 ◽  
Vol 123 (35) ◽  
pp. 21415-21421 ◽  
Author(s):  
Qiongyi Shang ◽  
Brandon D. Piercy ◽  
Mark D. Losego ◽  
Tianquan Lian
Keyword(s):  
Quantum Dot ◽  
Charge Separation ◽  
Surface Ligand ◽  
Effect Of Surface

The direct observation of charge separation dynamics in CdSe quantum dots/cobaloxime hybrids

2016 ◽  
Vol 18 (6) ◽  
pp. 4300-4303 ◽  
Author(s):  
J. Huang ◽  
Y. Tang ◽  
K. L. Mulfort ◽  
X. Zhang
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Charge Separation ◽  
Cdse Quantum Dots ◽  
X Ray ◽  
Molecular Catalyst ◽  
Cdse Quantum Dot ◽  
Photoinduced Charge Separation ◽  
X Ray Absorption ◽  
Photoinduced Charge

In this work, we investigated photoinduced charge separation dynamics in a CdSe quantum dot/cobaloxime molecular catalyst hybrid using the combination of transient optical (OTA) and X-ray absorption (XTA) spectroscopy.

KONDO EFFECT AND SPIN-CHARGE SEPARATION IN QUANTUM DOTS

2001 ◽  
Vol 15 (10n11) ◽  
pp. 1426-1442
Author(s):  
L. I. GLAZMAN ◽  
F. W. J. HEKKING ◽  
A. I. LARKIN
Keyword(s):  
Quantum Dot ◽  
Charge Separation ◽  
Coulomb Blockade ◽  
Kondo Effect ◽  
Broad Band ◽  
Single Mode ◽  
Kondo Temperature ◽  
Average Charge ◽  
Opposite Case ◽  
Anderson Impurity Model

The Kondo effect in a quantum dot is discussed. In the standard Coulomb blockade setting, tunneling between the dot and the leads is weak, the number of electrons in the dot is well-defined and discrete; the Kondo effect may be considered in the framework of the conventional one-level Anderson impurity model. It turns out however, that the Kondo temperature TK in the case of weak tunneling is extremely low. In the opposite case of almost reflectionless single-mode junctions connecting the dot to the leads, the average charge of the dot is not discrete. Surprisingly, its spin may remain quantized: s=1/2 or s=0, depending (periodically) on the gate voltage. Such a "spin-charge separation" occurs because, unlike an Anderson impurity, a quantum dot carries a broad-band, dense spectrum of discrete levels. In the doublet state, the Kondo effect develops with a significantly enhanced TK. Like in the weak-tunneling regime, the enhanced TK exhibits strong mesoscopic fluctuations. The statistics of the fluctuations is universal, and related to the Porter-Thomas statistics of the wave function fluctuations.

Ultrastable CsPbBr 3 Perovskite Quantum Dot and Their Enhanced Amplified Spontaneous Emission by Surface Ligand Modification

Small ◽  
2019 ◽  
pp. 1901173 ◽  
Author(s):  
Dongdong Yan ◽  
Tongchao Shi ◽  
Zhigang Zang ◽  
Tingwei Zhou ◽  
Zhengzheng Liu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Spontaneous Emission ◽  
Amplified Spontaneous Emission ◽  
Ligand Modification ◽  
Surface Ligand

Electron accepting naphthalene bisimide ligand architectures for modulation of π–π stacking in nanocrystal hybrid materials

2020 ◽  
Vol 5 (11) ◽  
pp. 1509-1514
Author(s):  
Katherine C. Elbert ◽  
Mohammad M. Taheri ◽  
Natalie Gogotsi ◽  
Jungmi Park ◽  
Jason B. Baxter ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Quantum Dot ◽  
Hybrid Materials ◽  
Π Stacking ◽  
Surface Ligand

Quantum dot surface ligand configuration effects on electron transfer.

scholarly journals Perovskite quantum dot solar cells: Mapping interfacial energetics for improving charge separation

Nano Energy ◽  
2020 ◽  
Vol 78 ◽  
pp. 105319
Author(s):  
Chuanxiao Xiao ◽  
Qian Zhao ◽  
Chun-Sheng Jiang ◽  
Yinong Sun ◽  
Mowafak M. Al-Jassim ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Charge Separation ◽  
Quantum Dot Solar Cells ◽  
Interfacial Energetics

Enhancement of the Yield of Photoinduced Charge Separation in Zinc Porphyrin–Quantum Dot Complexes by a Bis(dithiocarbamate) Linkage

2015 ◽  
Vol 119 (9) ◽  
pp. 5195-5202 ◽  
Author(s):  
Shengye Jin ◽  
Mario Tagliazucchi ◽  
Ho-Jin Son ◽  
Rachel D. Harris ◽  
Kenneth O. Aruda ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Charge Separation ◽  
Zinc Porphyrin ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

Effect of surface coating composition on quantum dot mobility in porous media

2013 ◽  
Vol 15 (8) ◽  
Author(s):  
Yonggang Wang ◽  
Huiguang Zhu ◽  
Matthew D. Becker ◽  
Jessica Englehart ◽  
Linda M. Abriola ◽  
...  
Keyword(s):  
Porous Media ◽  
Quantum Dot ◽  
Surface Coating ◽  
Coating Composition ◽  
Effect Of Surface

Influence of the surface ligand molecules length on the optical properties and photoconductivity of PbS quantum dot condensates

2017 ◽  
Vol 43 (10) ◽  
pp. 879-881 ◽  
Author(s):  
M. A. Zvaigzne ◽  
A. E. Aleksandrov ◽  
P. S. Samokhvalov ◽  
I. L. Martynov ◽  
D. A. Lypenko ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Dot ◽  
Surface Ligand ◽  
Pbs Quantum Dot
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