Highly emitting perovskite quantum dots are finally available in water

2018 ◽  
Vol 9 (01) ◽  
pp. 1-2 ◽  
Author(s):  
Guocan Jiang ◽  
Nikolai Gaponik
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Scale Up ◽  
Quantum Yields ◽  
Aqueous Environment ◽  
Aqueous Synthesis ◽  
Perovskite Nanocrystals ◽  
Perovskite Quantum Dots ◽  
Perovskite Nanoparticles

The interest on strongly emitting colloidal perovskite nanoparticles has been arisen explosively since several years. The versatility of the synthesis and the resulting scale-up, as well as high performance in terms of photoluminescence quantum yields and narrow spectra make these nanocrystals extremely attractive in optoelectronics. However, commonly known instability of these nanoparticles in aqueous environment is an important issue limiting their applications. This letter highlights a recent report by Geng et al. presenting direct aqueous synthesis of strongly emitting perovskite nanocrystals. One can foresee extrapolation of these results toward other perovskites including those based on Pb-free materials.

Room-temperature and gram-scale synthesis of CsPbX3 (X = Cl, Br, I) perovskite nanocrystals with 50–85% photoluminescence quantum yields

2016 ◽  
Vol 52 (45) ◽  
pp. 7265-7268 ◽  
Author(s):  
Song Wei ◽  
Yanchun Yang ◽  
Xiaojiao Kang ◽  
Lan Wang ◽  
Lijian Huang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Quantum Yields ◽  
Perovskite Nanocrystals ◽  
Perovskite Quantum Dots

CsPbX3 perovskite quantum dots with 50–85% photoluminescence quantum yields have been successfully synthesized at room temperature in open air.

scholarly journals Flexible and efficient perovskite quantum dot solar cells via hybrid interfacial architecture

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Long Hu ◽  
Qian Zhao ◽  
Shujuan Huang ◽  
Jianghui Zheng ◽  
Xinwei Guan ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
High Performance ◽  
Mechanical Stability ◽  
Mechanical Adhesion ◽  
Perovskite Quantum Dots ◽  
Efficient Charge ◽  
Photovoltaic Technologies

AbstractAll-inorganic CsPbI3 perovskite quantum dots have received substantial research interest for photovoltaic applications because of higher efficiency compared to solar cells using other quantum dots materials and the various exciting properties that perovskites have to offer. These quantum dot devices also exhibit good mechanical stability amongst various thin-film photovoltaic technologies. We demonstrate higher mechanical endurance of quantum dot films compared to bulk thin film and highlight the importance of further research on high-performance and flexible optoelectronic devices using nanoscale grains as an advantage. Specifically, we develop a hybrid interfacial architecture consisting of CsPbI3 quantum dot/PCBM heterojunction, enabling an energy cascade for efficient charge transfer and mechanical adhesion. The champion CsPbI3 quantum dot solar cell has an efficiency of 15.1% (stabilized power output of 14.61%), which is among the highest report to date. Building on this strategy, we further demonstrate a highest efficiency of 12.3% in flexible quantum dot photovoltaics.

In Situ Ligand Bonding Management of CsPbI 3 Perovskite Quantum Dots Enables High‐Performance Photovoltaics and Red Light‐Emitting Diodes

2020 ◽  
Vol 59 (49) ◽  
pp. 22230-22237 ◽  
Author(s):  
Junwei Shi ◽  
Fangchao Li ◽  
Yan Jin ◽  
Cheng Liu ◽  
Ben Cohen‐Kleinstein ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Light Emitting ◽  
Perovskite Quantum Dots

Promoting photoluminescence quantum yields of glass-stabilized CsPbX3 (X = Cl, Br, I) perovskite quantum dots through fluorine doping

Nanoscale ◽  
2019 ◽  
Vol 11 (37) ◽  
pp. 17216-17221 ◽  
Author(s):  
Daqin Chen ◽  
Yue Liu ◽  
Changbin Yang ◽  
Jiasong Zhong ◽  
Su Zhou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yields ◽  
Fluorine Doping ◽  
Glass Crystallization ◽  
Perovskite Quantum Dots

Highly luminescent glass-stabilized CsPbX3 (X = Cl, Br, I) perovskite QDs are fabricated via an in situ glass crystallization strategy and fluorine doping.

Effect of Cores on Photoluminescence of Hybrid SiO2-Coated CdTe Quantum Dots

2020 ◽  
Vol 20 (9) ◽  
pp. 5478-5485
Author(s):  
Cong Xie ◽  
Yubin Zhao ◽  
Yuxiang Song ◽  
Yingjie Liu ◽  
Yaya Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Stability ◽  
Sol Gel ◽  
Quantum Yields ◽  
Core Shell ◽  
Aqueous Synthesis ◽  
Pl Spectra ◽  
Cdte Qds ◽  
Sol Gel Process ◽  
20 Nm

Compared with conventional semiconductor quantum dots, hybrid SiO2 coated CdTe QDs exhibited high stability, long fluorescent lifetime, high photoluminescence quantum yields, and well biocompatibility. In this paper, CdTe QDs with tunable PL from green to red emitting were prepared by an aqueous synthesis. A sol–gel process resulted in CdTe QDs coated with a hybrid SiO2 shell contained CdS-like clusters to obtain red-shifted PL spectra, increased PL efficiency and high stability. The clusters were formed by the reaction of Cd2+ and S2− ions generated via the decomposition of thioglycolic acid. The clusters around CdTe cores created a core–shell structure which is very similar with traditional semiconductor core–shell QDs. After being coated with a hybrid SiO2 shell, the PL of green-emitting naked CdTe QDs was red-shifted largely (~30 nm) while the PL of yellowemitting CdTe QDs revealed a small red-shifted (~20 nm). Furthermore, The PL of red-emitting naked CdTe QDs was red-shifted much small (less than 10 nm). This phenomenon is ascribed to the change of band gap of CdTe cores with sizes. The red-shift of PL spectra is attributed to the CdS-like clusters around the core rather than the thickness of the hybrid SiO2 shell.

Solution processed high performance perovskite quantum dots/ZnO phototransistors

Nano Research ◽  
2021 ◽  
Author(s):  
Md Mehedi Hasan ◽  
Eric Moyen ◽  
Jewel Kumer Saha ◽  
Md Mobaidul Islam ◽  
Arqum Ali ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Solution Processed ◽  
Perovskite Quantum Dots

Recent advances toward practical use of halide perovskite nanocrystals

2018 ◽  
Vol 6 (44) ◽  
pp. 21729-21746 ◽  
Author(s):  
Yuanyuan Dong ◽  
Yizhou Zhao ◽  
Siyu Zhang ◽  
Yi Dai ◽  
Lang Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yields ◽  
Perovskite Nanocrystals ◽  
Recent Advances ◽  
Optical Bandgaps ◽  
Halide Perovskite

Halide perovskite nanocrystals (NCs) and quantum dots (QDs) have received considerable attention, due to their superior photoluminescence quantum yields close to unity, variable morphologies, and tunable optical bandgaps achieved by modifying their composition, size and dimensionality.

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