scholarly journals Crystalline-Size Dependence of Dual Emission Peak on Hybrid Organic Lead-Iodide Perovskite Films at Low Temperatures

2018 ◽  
Vol 122 (39) ◽  
pp. 22717-22727 ◽  
Author(s):  
Raquel Chulia-Jordan ◽  
Elena Mas-Marzá ◽  
Alfredo Segura ◽  
Juan Bisquert ◽  
Juan P. Martínez-Pastor
Keyword(s):  
Low Temperatures ◽  
Size Dependence ◽  
Emission Peak ◽  
Crystalline Size ◽  
Lead Iodide ◽  
Dual Emission ◽  
Organic Lead

Effect of Thermal Annealing on the Photoluminescence Properties of a GaInNAs/GaAs Single Quantum Well

2000 ◽  
Vol 639 ◽  
Author(s):  
Laurent Grenouillet ◽  
Catherine Bru-Chevallier ◽  
Gérard Guillot ◽  
Philippe Gilet ◽  
Philippe Ballet ◽  
...  
Keyword(s):  
Quantum Well ◽  
Thermal Annealing ◽  
Low Temperatures ◽  
Blue Shift ◽  
Emission Peak ◽  
Single Quantum ◽  
Photoluminescence Properties ◽  
Single Quantum Well ◽  
Peak Energy ◽  
Strong Blue Shift

ABSTRACTWe report on the effect of thermal annealing on the photoluminescence properties of a Ga0.65In0.35N0.02As0.98/GaAs single quantum well. Thermal annealing is shown to decrease the strong nitrogen-induced localization effects observed at low temperatures and to reduce the full width at half maximum of the emission peak. It also induces a strong blue shift of the emission peak energy, which is thought not to arise from an In-Ga interdiffusion alone, as it is much larger than in a nitrogen-free reference single quantum well.

Shallow-defect photophysics of methylammonium/formamidinium lead iodide perovskite mixed crystals at low temperatures

2021 ◽  
Author(s):  
Alejandro R. Goñi ◽  
Adrián Francisco-López ◽  
Bethan Charles ◽  
Ma. Isabel Alonso ◽  
Miquel Garriga ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Mixed Crystals ◽  
Lead Iodide ◽  
Shallow Defect

scholarly journals Particle Size Dependence of the Magnetic Heat Capacity of Ni(OH)2Crystal at Low Temperatures

1968 ◽  
Vol 41 (2) ◽  
pp. 536-536 ◽  
Author(s):  
Michio Sorai ◽  
Akio Kosaki ◽  
Hiroshi Suga ◽  
Syûzô Seki
Keyword(s):  
Particle Size ◽  
Heat Capacity ◽  
Low Temperatures ◽  
Size Dependence

scholarly journals Investigation of the Electroluminescence Mechanism of GaN-Based Blue and Green Light-Emitting Diodes with Junction Temperature Range of 120–373 K

2020 ◽  
Vol 10 (2) ◽  
pp. 444 ◽  
Author(s):  
Sai Pan ◽  
Chenhong Sun ◽  
Yugang Zhou ◽  
Wei Chen ◽  
Rong Zhang ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Radiation Power ◽  
Emission Peak ◽  
Junction Temperature ◽  
Dynamic Resistance ◽  
Electron Blocking Layer ◽  
Light Emitting ◽  
Blue Led ◽  
Peak Energy ◽  
Green Led

Junction temperature (Tj) and current have important effects on light-emitting diode (LED) properties. Therefore, the electroluminescence (EL) spectra of blue and green LEDs were investigated in a Tj range of 120–373 K and in a current range of 80–240 mA based on accurate real-time measurements of Tj using an LED with a built-in sensor unit. Two maxima of the emission peak energy with changing Tj were observed for the green LED, while the blue LED showed one maximum. This was explained by the transition between the donor-bound excitons (DX) and free excitons A (FXA) in the green LED. At low temperatures, the emission peak energy, full width at half maximum (FWHM), and radiation power of the green LED increase rapidly with increasing current, while those of the blue LED increase slightly. This is because when the strong spatial potential fluctuation and low exciton mobility in the green LED is exhibited, with the current increasing, more bonded excitons are found in different potential valleys. With a shallower potential valley and higher exciton mobility, excitons are mostly bound around the potential minima. The higher threshold voltage of the LEDs at low temperatures may be due to the combined effects of the band gap, dynamic resistance, piezoelectric polarization, and electron-blocking layer (EBL).

Simple Way to Engineer Metal–Semiconductor Interface for Enhanced Performance of Perovskite Organic Lead Iodide Solar Cells

2014 ◽  
Vol 6 (8) ◽  
pp. 5651-5656 ◽  
Author(s):  
Yuzhuan Xu ◽  
Jiangjian Shi ◽  
Songtao Lv ◽  
Lifeng Zhu ◽  
Juan Dong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Lead Iodide ◽  
Semiconductor Interface ◽  
Organic Lead

scholarly journals Controlling Solvate Intermediate Growth for Phase-Pure Organic Lead Iodide Ruddlesden–Popper (C4H9NH3)2(CH3NH3)n−1PbnI3n+1 Perovskite Thin Films

2019 ◽  
Vol 31 (15) ◽  
pp. 5832-5844 ◽  
Author(s):  
Clayton J. Dahlman ◽  
Ryan A. DeCrescent ◽  
Naveen R. Venkatesan ◽  
Rhys M. Kennard ◽  
Guang Wu ◽  
...  
Keyword(s):  
Thin Films ◽  
Lead Iodide ◽  
Intermediate Growth ◽  
Phase Pure ◽  
Organic Lead

A graphene quantum dots based fluorescent sensor for anthrax biomarker detection and its size dependence

2015 ◽  
Vol 3 (24) ◽  
pp. 4865-4870 ◽  
Author(s):  
Jaehoon Ryu ◽  
Eunwoo Lee ◽  
Kisu Lee ◽  
Jyongsik Jang
Keyword(s):  
Quantum Dots ◽  
Bacillus Anthracis ◽  
Size Dependence ◽  
Fluorescent Sensor ◽  
Graphene Quantum Dots ◽  
Fluorescent Sensors ◽  
Biomarker Detection ◽  
Dual Emission ◽  
Different Diameters

Graphene quantum dots (GQDs) with two different diameters were modified via hybridization with a EuIII–macromolecule complex, and their application as dual emission fluorescent sensors for detection of Bacillus anthracis spores was investigated.

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