scholarly journals The Role of Sodium in Stabilizing Tin-Lead (Sn-Pb) Alloyed Perovskite Quantum Dots

2021 ◽  
Author(s):  
Junke Jiang ◽  
Feng Liu ◽  
Qing Shen ◽  
Shuxia Tao
Keyword(s):  
Quantum Dots ◽  
Phase Stability ◽  
Band Gaps ◽  
Great Promise ◽  
Narrow Bandgap ◽  
Perovskite Quantum Dots ◽  
Optoelectronic Applications

Narrow-bandgap CsSnxPb1-xI3 perovskite quantum dots (QDs) show great promise for optoelectronic applications owing to their reduced use of toxic Pb, improved phase stability, and tunable band gaps in the visible...

Poly(Vinylidene Fluoride)-Passivated CsPbBr3 Perovskite Quantum Dots with Near-Unity Photoluminescence Quantum Yield and Superior Stability

2021 ◽  
Author(s):  
Lin Yang ◽  
Bowen Fu ◽  
Xu Li ◽  
Hao Chen ◽  
Lili Li
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Vinylidene Fluoride ◽  
Excellent Performance ◽  
Inorganic Perovskite ◽  
Photoluminescence Quantum Yield ◽  
Poly Vinylidene Fluoride ◽  
Perovskite Quantum Dots ◽  
Optoelectronic Applications ◽  
Pl Quenching

All inorganic perovskite quantum dots (QDs) have received great attention owing to their excellent performance in optoelectronic applications. However, they often suffer from the defect-related photoluminescence (PL) quenching and phase...

Critical role of metal ions in surface engineering toward brightly luminescent and stable cesium lead bromide perovskite quantum dots

Nanoscale ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 2602-2607 ◽  
Author(s):  
Congyang Zhang ◽  
Bo Wang ◽  
Qun Wan ◽  
Long Kong ◽  
Weilin Zheng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Metal Ions ◽  
Surface Engineering ◽  
Critical Role ◽  
Stable Cesium ◽  
Photoluminescence Quantum Yield ◽  
Lead Bromide ◽  
Perovskite Quantum Dots ◽  
Engineering Strategy

A facile metal ions-assistant ligand surface engineering strategy to synchronously boost photoluminescence quantum yield and stability of CsPbBr3 PQDs.

scholarly journals Ultrasensitive and ultrathin phototransistors and photonic synapses using perovskite quantum dots grown from graphene lattice

2020 ◽  
Vol 6 (7) ◽  
pp. eaay5225 ◽  
Author(s):  
Basudev Pradhan ◽  
Sonali Das ◽  
Jinxin Li ◽  
Farzana Chowdhury ◽  
Jayesh Cherusseri ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optoelectronic Devices ◽  
Generation Efficiency ◽  
Charge Generation ◽  
Graphene Lattice ◽  
New Directions ◽  
Perovskite Quantum Dots ◽  
Efficient Charge ◽  
Halide Perovskite ◽  
Optoelectronic Applications

Organic-inorganic halide perovskite quantum dots (PQDs) constitute an attractive class of materials for many optoelectronic applications. However, their charge transport properties are inferior to materials like graphene. On the other hand, the charge generation efficiency of graphene is too low to be used in many optoelectronic applications. Here, we demonstrate the development of ultrathin phototransistors and photonic synapses using a graphene-PQD (G-PQD) superstructure prepared by growing PQDs directly from a graphene lattice. We show that the G-PQDs superstructure synchronizes efficient charge generation and transport on a single platform. G-PQD phototransistors exhibit excellent responsivity of 1.4 × 108 AW–1 and specific detectivity of 4.72 × 1015 Jones at 430 nm. Moreover, the light-assisted memory effect of these superstructures enables photonic synaptic behavior, where neuromorphic computing is demonstrated by facial recognition with the assistance of machine learning. We anticipate that the G-PQD superstructures will bolster new directions in the development of highly efficient optoelectronic devices.

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.

Role of Cation-Anion Organic Ligands for Optical Properties of Fully Inorganic Perovskite Quantum Dots

MRS Advances ◽  
2018 ◽  
Vol 3 (55) ◽  
pp. 3255-3261 ◽  
Author(s):  
Aaron Forde ◽  
Talgat Inerbaev ◽  
Dmitri Kilin
Keyword(s):  
Quantum Dots ◽  
Surface Passivation ◽  
Binding Energies ◽  
Organic Ligands ◽  
Trap States ◽  
Light Emitting ◽  
Inorganic Perovskite ◽  
Perovskite Quantum Dots ◽  
Reasonable Choice

ABSTRACTApplication of lead-halide perovskite nanostructures for photovoltaic and light emitting applications depends on fashion of the surface termination. The reasonable choice of surface ligands for perovskite nanostructures prevent formation of trap states and contribute to chemical stability, wide opening of the bandgap, and intensity of absorption and photoluminescence of perovskite nanostructures. This work provides atomistic arguments for dual ligand protocol of surface passivation of fully inorganic perovskite quantum dots with fully organic ligands being a mix of cations (ethyl-ammonium) and anions (acetic) in nearly equal proportions. Computed binding energies of either individual ligands or anion-cation pairs demonstrate high stability in comparison to thermal energy and are concluded to be favourable choice in synthesis of colloidal perovskite quantum dots for light emitting applications.

Enhancing the light-emitting performance and stability in CsPbBr3 perovskite quantum dots via simultaneous doping and surface passivation

2020 ◽  
Vol 8 (41) ◽  
pp. 14439-14445 ◽  
Author(s):  
Hengxiang Yang ◽  
Wenxu Yin ◽  
Wei Dong ◽  
Long Gao ◽  
Ching-Hong Tan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Passivation ◽  
Color Purity ◽  
Promising Candidate ◽  
Light Emitting ◽  
Inorganic Perovskite ◽  
Perovskite Quantum Dots ◽  
Optoelectronic Applications ◽  
Simultaneous Doping ◽  
Narrow Emission

Inorganic perovskite CsPbBr3 quantum dots (QDs) have emerged as a promising candidate for optoelectronic applications due to their narrow emission and color purity, among other things.

Efficient and stable CsPbI3 perovskite quantum dots enabled by in situ ytterbium doping for photovoltaic applications

2019 ◽  
Vol 7 (36) ◽  
pp. 20936-20944 ◽  
Author(s):  
Junwei Shi ◽  
Fangchao Li ◽  
Jianyu Yuan ◽  
Xufeng Ling ◽  
Sijie Zhou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Perovskite Nanocrystals ◽  
Photovoltaic Applications ◽  
Perovskite Quantum Dots ◽  
Optoelectronic Applications ◽  
Ytterbium Doping

Colloidal perovskite nanocrystals, or quantum dots (QDs), have quickly emerged and exhibited unique opportunities for optoelectronic applications.

Quantum Dot Based Solar Cells: Role of Nanoarchitectures, Perovskite Quantum Dots, and Charge‐Transporting Layers

ChemSusChem ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4724-4753 ◽  
Author(s):  
Jasmin S. Shaikh ◽  
Navajsharif S. Shaikh ◽  
Sawanta S. Mali ◽  
Jyoti V. Patil ◽  
Sonali A. Beknalkar ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Perovskite Quantum Dots

Improved stability of CsPbBr3 perovskite quantum dots achieved by suppressing interligand proton transfer and applying a polystyrene coating

Nanoscale ◽  
2018 ◽  
Vol 10 (45) ◽  
pp. 21441-21450 ◽  
Author(s):  
Yuting Cai ◽  
Le Wang ◽  
Tianliang Zhou ◽  
Peng Zheng ◽  
Ye Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electrical Properties ◽  
Proton Transfer ◽  
Great Promise ◽  
Optical And Electrical Properties ◽  
Inorganic Lead ◽  
Perovskite Quantum Dots ◽  
Improved Stability ◽  
Halide Perovskite ◽  
Lead Halide

All-inorganic lead halide perovskite quantum dots (PQDs) have shown great promise for optoelectronic applications due to their unique optical and electrical properties.

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