The influence of dopant concentration on temperature dependent emission spectra in LiLa1−x−yEuxTbyP4O12 nanocrystals: toward rational design of highly-sensitive luminescent nanothermometers

2016 ◽  
Vol 18 (23) ◽  
pp. 15584-15592 ◽  
Author(s):  
L. Marciniak ◽  
A. Bednarkiewicz
Keyword(s):  
Temperature Sensitivity ◽  
Rational Design ◽  
Dopant Concentration ◽  
Emission Spectra ◽  
Temperature Dependent ◽  
Sensing Range ◽  
Highly Sensitive

Luminescence nanothermometry is gaining great interest, and different excitation and readout schemes have been sought to improve temperature sensitivity and sensing range, or to simplify the readout.

Temperature-Dependent Photoluminescence Spectra of PbSe Quantum Dots for Temperature Markers

2012 ◽  
Vol 482-484 ◽  
pp. 2547-2550
Author(s):  
Peng Fei Gu ◽  
Ya Nan Wang ◽  
Jia Jia Cao ◽  
Yu Yan ◽  
Tie Qiang Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Temperature Sensitivity ◽  
Peak Position ◽  
Strong Temperature Dependence ◽  
Photoluminescence Spectra ◽  
Temperature Dependent ◽  
Temperature Variations ◽  
Temperature Changes ◽  
Optical Readout ◽  
Temperature Dependent Photoluminescence

We here report the temperature effect on photoluminescence(PL) spectra of PbSe quantum dots (QDs), which exhibit a strong temperature dependence on their spectra position and intensity. They potentially act as the temperature marker, sensing temperature variations and reporting temperature changes remotely through optical readout. In addition, the temperature sensitivity characterized by peak position of PbSe QDs was found to be 0.39nm/°C in a range of 10-100 °C.

scholarly journals Light Emission by Nanoporous GaN Produced by a Top-Down, Nonlithographical Nanopatterning

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
E. Kheirandish ◽  
N. A. Kouklin ◽  
J. Liang
Keyword(s):  
Light Emission ◽  
Electronic Devices ◽  
Emission Spectra ◽  
Temperature Dependent ◽  
Physical Mechanisms ◽  
Spectral Shifts ◽  
Nanopore Arrays ◽  
Bulk Gan ◽  
Pl Emission ◽  
Temperature Dependent Photoluminescence

Temperature-dependent photoluminescence (PL) spectroscopy is carried out to probe radiative recombination and related light emission processes in two-dimensional periodic close-packed nanopore arrays in gallium nitride (np-GaN). The arrays were produced by nonlithographic nanopatterning of wurtzite GaN followed by a dry etching. The results of Raman spectroscopy point to a small relaxation of the compressive stress of ~0.24 GPa in nanoporous vs. bulk GaN. At ~300 K, the PL emission is induced by excitons and not free-carrier interband radiative recombinations. An evolution of the emission spectra with T is confirmed to be mainly a result of a decay of nonexcitonic PL emission and less of spectral shifts of the underlying PL bands. A switching of excitonic PL regime observed experimentally was analyzed within the exciton recombination-generation framework. The study provides new insights into the behaviors and physical mechanisms regulating light emission processes in np-GaN, critical to the development of nano-opto-electronic devices based on mesoscopic GaN.

Temperature Dependent Vibronic Structures in the Emission Spectra of Poly( p -Phenylene Vinylene)

2002 ◽  
Vol 374 ◽  
pp. 427-432 ◽  
Author(s):  
C. A. M. Borges ◽  
A. Marletta ◽  
R. M. Faria ◽  
F. E. G. Guimaraes
Keyword(s):  
Emission Spectra ◽  
Phenylene Vinylene ◽  
Temperature Dependent

Synthesis and luminescent properties of La1−xNdxP5O14 nanocrystals

2014 ◽  
Vol 16 (33) ◽  
pp. 18004-18009 ◽  
Author(s):  
L. Marciniak ◽  
W. Strek ◽  
Y. Guyot ◽  
D. Hreniak
Keyword(s):  
Dopant Concentration ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Spectroscopic Properties ◽  
Branching Ratios ◽  
Luminescence Decay ◽  
The Impact

The impact of dopant concentration on spectroscopic properties of La1−xNdxP5O12 nanocrystals: the luminescence decay profiles – (a); emission spectra – (b); and luminescence branching ratios – (c).

scholarly journals Random terpolymer based on thiophene-thiazolothiazole unit enabling efficient non-fullerene organic solar cells

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Jingnan Wu ◽  
Guangwei Li ◽  
Jin Fang ◽  
Xia Guo ◽  
Lei Zhu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Temperature Dependent ◽  
Polymer Backbone ◽  
Positive Effects ◽  
Highly Sensitive ◽  
Aggregation Property ◽  
Reduced Temperature

Abstract Developing a high-performance donor polymer is critical for achieving efficient non-fullerene organic solar cells (OSCs). Currently, most high-efficiency OSCs are based on a donor polymer named PM6, unfortunately, whose performance is highly sensitive to its molecular weight and thus has significant batch-to-batch variations. Here we report a donor polymer (named PM1) based on a random ternary polymerization strategy that enables highly efficient non-fullerene OSCs with efficiencies reaching 17.6%. Importantly, the PM1 polymer exhibits excellent batch-to-batch reproducibility. By including 20% of a weak electron-withdrawing thiophene-thiazolothiazole (TTz) into the PM6 polymer backbone, the resulting polymer (PM1) can maintain the positive effects (such as downshifted energy level and reduced miscibility) while minimize the negative ones (including reduced temperature-dependent aggregation property). With higher performance and greater synthesis reproducibility, the PM1 polymer has the promise to become the work-horse material for the non-fullerene OSC community.

scholarly journals Correction: Cubic mesoporous Pd–WO3 loaded graphitic carbon nitride (g-CN) nanohybrids: highly sensitive and temperature dependent VOC sensors

2020 ◽  
Vol 8 (38) ◽  
pp. 20185-20186
Author(s):  
Ritu Malik ◽  
Vijay K. Tomer
Keyword(s):  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Temperature Dependent ◽  
Highly Sensitive ◽  
Cubic Mesoporous

Correction for ‘Cubic mesoporous Pd–WO3 loaded graphitic carbon nitride (g-CN) nanohybrids: highly sensitive and temperature dependent VOC sensors’ by Ritu Malik et al., J. Mater. Chem. A, 2018, 6, 10718–10730, DOI: 10.1039/C8TA02702A.

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