Comparative investigation on temperature-dependent photoluminescence of CH3NH3PbBr3and CH(NH2)2PbBr3microstructures

2016 ◽  
Vol 4 (20) ◽  
pp. 4408-4413 ◽  
Author(s):  
Jun Dai ◽  
Hongge Zheng ◽  
Can Zhu ◽  
Junfeng Lu ◽  
Chunxiang Xu
Keyword(s):  
Phase Transition ◽  
Room Temperature ◽  
Comparative Investigation ◽  
Emission Peak ◽  
Red Shift ◽  
Photoluminescence Spectra ◽  
Temperature Dependent ◽  
Exciton Emission ◽  
Temperature Dependent Photoluminescence

Temperature-dependent photoluminescence spectra of CH3NH3PbBr3show that the exciton emission peak continuously blue shifts with the increase in temperature from 10 K to room temperature. CH(NH2)2PbBr3shows a sudden red shift near 150 K due to phase transition.

Growth and Optical Properties of ZnO Low-Dimensional Nanostructures

2008 ◽  
Vol 8 (3) ◽  
pp. 1101-1109 ◽  
Author(s):  
Yichun Liu ◽  
Yanhong Tong
Keyword(s):  
Optical Properties ◽  
Room Temperature ◽  
Two Dimensions ◽  
Zno Nanostructures ◽  
Photoluminescence Spectra ◽  
Temperature Dependent ◽  
Room Temperature Photoluminescence ◽  
Low Dimensional ◽  
Low Temperature Photoluminescence ◽  
Temperature Dependent Photoluminescence

Recent studies on the growth of ZnO nanostructures and their optical properties were reviewed. Using different methods, a variety of ZnO nanostructures, including quantum dots nanotowers, nanotubes, nanorods, nanowires, and nanosheets, displaying zero, one, and two dimensions, have been synthesized. The growth of ZnO low-dimensional nanostructures has been demonstrated. Their optical properties have been studied by means of room-temperature photoluminescence spectra, low-temperature photoluminescence spectra, temperature-dependent photoluminescence spectra, and pressure-dependent photoluminescence spectra. The optical properties can be adjusted by the surface features of ZnO low-dimensional nanostructures. The strong exciton emission has been observed in some nanostructures, showing promising potential in nanodevice applications.

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 Temperature-dependent photoluminescence properties of porous fluorescent SiC

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Weifang Lu ◽  
Abebe T. Tarekegne ◽  
Yiyu Ou ◽  
Satoshi Kamiyama ◽  
Haiyan Ou
Keyword(s):  
Surface Passivation ◽  
Surface States ◽  
Atomic Layer ◽  
Emission Peak ◽  
Photoelectron Spectra ◽  
Porous Structures ◽  
Temperature Dependent ◽  
Time Resolved ◽  
Pl Emission ◽  
Temperature Dependent Photoluminescence

Abstract A comprehensive study of surface passivation effect on porous fluorescent silicon carbide (SiC) was carried out to elucidate the luminescence properties by temperature dependent photoluminescence (PL) measurement. The porous structures were prepared using an anodic oxidation etching method and passivated by atomic layer deposited (ALD) Al2O3 films. An impressive enhancement of PL intensity was observed in porous SiC with ALD Al2O3, especially at low temperatures. At temperatures below 150 K, two prominent PL emission peaks located at 517 nm and 650 nm were observed. The broad emission peak at 517 nm was attributed to originate from the surface states in the porous structures, which was supported by X-ray photoelectron spectra characterization. The emission peak at 650 nm is due to donor-acceptor-pairs (DAP) recombination via nitrogen donors and boron-related double D-centers in fluorescent SiC substrates. The results of the present work suggest that the ALD Al2O3 films can effectively suppress the non-radiative recombination for the porous structures on fluorescent SiC. In addition, we provide the evidence based on the low-temperature time-resolved PL that the mechanism behind the PL emission in porous structures is mainly related to the transitions via surface states.

Observation of unusual temperature-dependent stripes in LiTaO3and LiTaxNb1−xO3crystals with near-zero birefringence

2010 ◽  
Vol 43 (6) ◽  
pp. 1305-1313 ◽  
Author(s):  
A. M. Glazer ◽  
Nan Zhang ◽  
Ausrine Bartasyte ◽  
D. S. Keeble ◽  
S. Huband ◽  
...  
Keyword(s):  
Phase Transition ◽  
Room Temperature ◽  
Paraelectric Phase ◽  
Microscopy Study ◽  
Vapour Transport ◽  
Temperature Dependent ◽  
Paraelectric Phase Transition ◽  
Optical Birefringence ◽  
Self Organized ◽  
Li Content

A birefringence imaging microscopy study of LiTaO3and some mixed LiTaxNb1−xO3crystals is reported. The initially congruent LiTaO3crystals have been subject to vapour transport equilibration in order to increase the Li content and at the same time to reduce the optical birefringence close to zero at room temperature. In both types of crystal, the presence of unusual periodic self-organized stripes, existing over large distances, has been observed, which correlate with the well documented cleavage and twin planes in this material. Furthermore, the stripes become narrower as the temperature is changed away from the zero-birefringence temperature, but become temperature-independent above the ferroelectric–paraelectric phase-transition temperature.

scholarly journals Temperature-Dependent Photoluminescence of Manganese Halide with Tetrahedron Structure in Anti-Perovskites

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3310
Author(s):  
Yijie Xia ◽  
Shuaishuai Du ◽  
Pengju Huang ◽  
Luchao Wu ◽  
Siyu Yan ◽  
...  
Keyword(s):  
Energy Level ◽  
Recombination Rate ◽  
Radiative Recombination ◽  
Room Temperature ◽  
Energy Levels ◽  
Radiative Recombination Rate ◽  
Temperature Dependent ◽  
Recombination Rates ◽  
Increasing Temperature ◽  
Temperature Dependent Photoluminescence

The temperature-dependent photoluminescence (PL) properties of an anti-perovskite [MnBr4]BrCs3 sample in the temperature range of 78–500 K are studied in the present work. This material exhibits unique performance which is different from a typical perovskite. Experiments showed that from room temperature to 78 K, the luminous intensity increased as the temperature decreased. From room temperature to 500 K, the photoluminescence intensity gradually decreased with increasing temperature. Experiments with varying temperatures repeatedly showed that the emission wavelength was very stable. Based on the above-mentioned phenomenon of the changing photoluminescence under different temperatures, the mechanism is deduced from the temperature-dependent characteristics of excitons, and the experimental results are explained on the basis of the types of excitons with different energy levels and different recombination rates involved in the steady-state PL process. The results show that in the measured temperature range of 78–500 K, the steady-state PL of [MnBr4]BrCs3 had three excitons with different energy levels and recombination rates participating. The involved excitons with the highest energy level not only had a high radiative recombination rate, but a high non-radiative recombination rate as well. The excitons at the second-highest energy level had a similar radiative recombination rate to the lowest energy level excitons and a had high non-radiative recombination rate. These excitons made the photoluminescence gradually decrease with increasing temperature. This may be the reason for this material’s high photoluminescence efficiency and low electroluminescence efficiency.

Temperature-dependent phase transition and comparative investigation on enhanced magnetic and optical properties between sillenite and perovskite bismuth ferrite-rGO nanocomposites

2017 ◽  
Vol 122 (8) ◽  
pp. 084902 ◽  
Author(s):  
M. A. Jalil ◽  
Sayeed Shafayet Chowdhury ◽  
Mashnoon Alam Sakib ◽  
S. M. Enamul Hoque Yousuf ◽  
Emran Khan Ashik ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Bismuth Ferrite ◽  
Comparative Investigation ◽  
Temperature Dependent

Temperature-dependent photoluminescence spectra of GaN epitaxial layer grown on Si (111) substrate

2015 ◽  
Vol 24 (10) ◽  
pp. 108101 ◽  
Author(s):  
Dan-Mei Zhao ◽  
De-Gang Zhao ◽  
De-Sheng Jiang ◽  
Zong-Shun Liu ◽  
Jian-Jun Zhu ◽  
...  
Keyword(s):  
Epitaxial Layer ◽  
Photoluminescence Spectra ◽  
Temperature Dependent ◽  
Temperature Dependent Photoluminescence

Room temperature synthesis of Mn-doped Cs3Pb6.48Cl16 perovskite nanocrystals with pure dopant emission and temperature-dependent photoluminescence

CrystEngComm ◽  
2019 ◽  
Vol 21 (23) ◽  
pp. 3568-3575 ◽  
Author(s):  
Kun Bai ◽  
Rihui Tan ◽  
Bao Ke ◽  
Xiaogang Xue ◽  
Jialong Zhao ◽  
...  
Keyword(s):  
Room Temperature ◽  
Temperature Dependent ◽  
Temperature Synthesis ◽  
Perovskite Nanocrystals ◽  
Room Temperature Synthesis ◽  
Mn Doped ◽  
Temperature Dependent Photoluminescence

We report Mn-doped Cs3Pb6.48Cl16 nanocrystals with pure dopant emission synthesized at room temperature.

Influence of mixed organic cations on the structural and optical properties of lead tri-iodide perovskites

Nanoscale ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 5215-5221 ◽  
Author(s):  
Guotao Pang ◽  
Xiaoqi Lan ◽  
Ruxue Li ◽  
Zhubing He ◽  
Rui Chen
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Organic Cation ◽  
Organic Cations ◽  
Temperature Dependent ◽  
Structural And Optical Properties ◽  
Transition Range ◽  
Phase Transition Range ◽  
Temperature Dependent Photoluminescence

Temperature-dependent photoluminescence in the phase transition range shows that mixed-organic-cation perovskites are more stable than their pure counterparts.

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