Near-Unity Photoluminescence Quantum Yield and Highly Suppressed Blinking in a Toxic-Metal-Free Quantum Dot

2021 ◽  
Vol 12 (5) ◽  
pp. 1426-1431
Author(s):  
Swarnali Ghosh ◽  
Saptarshi Mandal ◽  
Soumen Mukherjee ◽  
Chayan K. De ◽  
Tridib Samanta ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Quantum Dot ◽  
Toxic Metal ◽  
Metal Free ◽  
Photoluminescence Quantum Yield

Thin-shell CdSe/ZnCdS core/shell quantum dots and their electroluminescent device application

2018 ◽  
Vol 6 (41) ◽  
pp. 11104-11110 ◽  
Author(s):  
Song Wei ◽  
Yue Liu ◽  
Mingyue Ma ◽  
Yao Wu ◽  
Lijian Huang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Quantum Dot ◽  
Current Efficiency ◽  
Thin Shell ◽  
Light Emitting Diode ◽  
Core Shell ◽  
Light Emitting ◽  
Photoluminescence Quantum Yield ◽  
A Current

Thin-shell CdSe/2CdS0.5Zn0.5S core/shell quantum dots with a photoluminescence quantum yield of 82% were synthesized. A quantum dot light emitting diode with a current efficiency of 12.5 cd A−1was fabricated.

scholarly journals Engineering Sr-doping for enabling long-term stable FAPb1−xSrxI3 quantum dots with 100% photoluminescence quantum yield

2021 ◽  
Vol 9 (5) ◽  
pp. 1555-1566
Author(s):  
Andrés F. Gualdrón-Reyes ◽  
David F. Macias-Pinilla ◽  
Sofia Masi ◽  
Carlos Echeverría-Arrondo ◽  
Said Agouram ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Toxic Metals ◽  
Environmentally Friendly ◽  
Photoluminescence Quantum Yield ◽  
Improved Performance ◽  
Pb Substitution

The Pb substitution in quantum dots (PQDs) with lesser toxic metals has been widely searched to be environmentally friendly, and be of comparable or improved performance compared to the lead-perovskite.

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...

Blue-Violet Emission with Near-Unity Photoluminescence Quantum Yield from Cu(I)-Doped Rb3InCl6 Single Crystals

2021 ◽  
pp. 7928-7934
Author(s):  
Chao Zhang ◽  
Xuezhen Feng ◽  
Qilin Song ◽  
Chaocheng Zhou ◽  
Lin Peng ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Single Crystals ◽  
Violet Emission ◽  
Photoluminescence Quantum Yield

Room temperature synthesis of Sn2+ doped highly luminescent CsPbBr3 quantum dots for high CRI white light-emitting diodes

Nanoscale ◽  
2021 ◽  
Author(s):  
Dongdong Yan ◽  
Qionghua Mo ◽  
Shuangyi Zhao ◽  
Wensi Cai ◽  
Zhigang Zang
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
White Light ◽  
Room Temperature ◽  
Temperature Synthesis ◽  
Light Emitting ◽  
Photoluminescence Quantum Yield ◽  
Hot Injection ◽  
White Light Emitting Diodes ◽  
Cspbbr3 Quantum Dots

With a high photoluminescence quantum yield (PLQY) being able to exceed 90% for those prepared by hot injection method, CsPbBr3 quantum dots (QDs) have attracted intensive attentions for white light-emitting...

scholarly journals Air stable and highly efficient Bi3+-doped Cs2SnCl6 for blue light-emitting diodes

RSC Advances ◽  
2021 ◽  
Vol 11 (42) ◽  
pp. 26415-26420
Author(s):  
Yue Yao ◽  
Si-Wei Zhang ◽  
Zijian Liu ◽  
Chun-Yun Wang ◽  
Ping Liu ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Coordinates ◽  
Blue Led ◽  
Highly Efficient ◽  
Photoluminescence Quantum Yield ◽  
Long Life

A Bi3+-doped Cs2SnCl6 exhibits photoluminescence at around 456 nm and a photoluminescence quantum yield of 31%. The blue LED based on the Bi3+-doped Cs2SnCl6 phosphor exhibits a long life of 120 hours and a CIE color coordinates of (0.14, 0.11).

scholarly journals Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐Aggregates

2021 ◽  
pp. 1903080
Author(s):  
Surendra B. Anantharaman ◽  
Joachim Kohlbrecher ◽  
Gabriele Rainò ◽  
Sergii Yakunin ◽  
Thilo Stöferle ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Room Temperature ◽  
Room Temperature Photoluminescence ◽  
Photoluminescence Quantum Yield ◽  
J Aggregates

scholarly journals Impact of Pretreatment of the Bulk Starting Material on the Efficiency of Liquid Phase Exfoliation of WS2

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1072
Author(s):  
Steffen Ott ◽  
Melanie Lakmann ◽  
Claudia Backes
Keyword(s):  
Liquid Phase ◽  
Quantum Yield ◽  
Aspect Ratio ◽  
Optical Quality ◽  
Starting Material ◽  
Binding Strength ◽  
Photoluminescence Quantum Yield ◽  
Out Of Plane ◽  
Liquid Phase Exfoliation ◽  
Pretreatment Conditions

Liquid phase exfoliation (LPE) is widely used to produce colloidal dispersions of nanomaterials, in particular two-dimensional nanosheets. The degree of exfoliation, i.e., the length to thickness aspect ratio was shown to be intrinsically limited by the ratio of in-plane to out-of-plane binding strength. In this work, we investigate whether simple pretreatment of the starting material can be used to change the in-plane to out-of-plane binding strength through mild intercalation to improve the sample quality in sonication-assisted LPE. Five different pretreatment conditions of WS2 were tested and the dispersions size-selected through centrifugation. From optical spectroscopy (extinction, Raman, photoluminescence), information on nanosheet dimension (average lateral size, layer number, monolayer size) and optical quality (relative photoluminescence quantum yield) was extracted. We find that the pretreatment has a minor impact on the length/thickness aspect ratio, but that photoluminescence quantum yield can be increased in particular using mild sonication conditions. We attribute this to the successful exfoliation of nanosheets with a lower degree of basal plane defectiveness. This work emphasizes the complexity of the exfoliation process and suggests that the role of defects has to be considered for a comprehensive picture.

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