Low temperature time resolved photoluminescence in ordered and disordered Cu2ZnSnS4 single crystals

2017 ◽  
Vol 508 ◽  
pp. 47-50 ◽  
Author(s):  
Taavi Raadik ◽  
Jüri Krustok ◽  
M. Kauk-Kuusik ◽  
K. Timmo ◽  
M. Grossberg ◽  
...  
Keyword(s):  
Low Temperature ◽  
Single Crystals ◽  
Time Resolved ◽  
Time Resolved Photoluminescence ◽  
Temperature Time

Low-temperature time-resolved photoluminescence in InGaN/GaN quantum wells

2002 ◽  
Vol 36 (6) ◽  
pp. 641-646 ◽  
Author(s):  
A. V. Andrianov ◽  
V. Yu. Nekrasov ◽  
N. M. Shmidt ◽  
E. E. Zavarin ◽  
A. S. Usikov ◽  
...  
Keyword(s):  
Low Temperature ◽  
Quantum Wells ◽  
Time Resolved ◽  
Time Resolved Photoluminescence ◽  
Temperature Time

Time-resolved photoluminescence in CdIn2S4

1987 ◽  
Vol 65 (3) ◽  
pp. 204-207 ◽  
Author(s):  
S. Charbonneau ◽  
E. Fortin ◽  
J. Beauvais
Keyword(s):  
Single Crystals ◽  
Free Electron ◽  
Continuous Wave ◽  
Time Window ◽  
Photoluminescence Spectra ◽  
Time Resolved ◽  
Spectral Bands ◽  
Window Technique ◽  
Donor Acceptor ◽  
Time Resolved Photoluminescence

Photoluminescence spectra of CdIn2S4 single crystals at 1.8 K under both continuous-wave (CW) and pulsed excitation were obtained. In the latter case, a variable time-window technique was used to observe the time evolution of the spectra between 0 and 100 μs. In contrast to previous studies, four spectral bands were observed under both CW and pulsed, intrinsic or extrinsic excitation. In particular, two bands previously unobserved under extrinsic excitation were detected at 1.35 and 1.68 eV, and have been attributed to donor–acceptor pairs and free-electron to acceptor transitions respectively.

Nitrogen function of aluminum-nitride codoped ZnO films deposited using cosputter system

2009 ◽  
Vol 24 (7) ◽  
pp. 2252-2258 ◽  
Author(s):  
Li-Wen Lai ◽  
Jheng-Tai Yan ◽  
Chia-Hsun Chen ◽  
Li-Ren Lou ◽  
Ching-Ting Lee
Keyword(s):  
Low Temperature ◽  
Oxygen Vacancies ◽  
Carrier Lifetime ◽  
Nitrogen Atmosphere ◽  
Zno Films ◽  
Deposition Condition ◽  
Time Resolved ◽  
Sapphire Substrates ◽  
Crystallographic Structures ◽  
Time Resolved Photoluminescence

AlN codoped ZnO films were deposited on sapphire substrates at low temperature using a cosputter system under various N2/(N2 + Ar) flow ratios. To investigate the nitrogen function, the ratio of nitrogen ambient was varied during cosputtering. AlN codoped ZnO films with various crystallographic structures and bonding configurations were measured. With an adequate nitrogen atmosphere deposition condition and postannealing temperature at 450 °C, the p-type conductive behaviors of AlN codoped ZnO films were achieved due to the formation of Zn–N bonds. According to the low-temperature photoluminescence spectra, the binding energy (EA) of 0.16 eV for N acceptors can be calculated. Using time-resolved photoluminescence measurement, the carrier lifetime in AlN codoped ZnO films increases due to the reduction of oxygen vacancies caused by the occupation of adequate nitrogen atoms.

Time-Resolved Photoluminescence Spectra in Single Crystals of CuAlS2:Mn

1991 ◽  
Vol 30 (Part 1, No. 2) ◽  
pp. 307-313 ◽  
Author(s):  
Katsuaki Sato ◽  
Koki Ishii ◽  
Kunio Watanabe ◽  
Kensei Ohe
Keyword(s):  
Single Crystals ◽  
Photoluminescence Spectra ◽  
Time Resolved ◽  
Time Resolved Photoluminescence

Time-resolved photoluminescence in band-edge region of hexagonal boron nitride single crystals

2008 ◽  
Vol 17 (4-5) ◽  
pp. 830-832 ◽  
Author(s):  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
Takashi Kuroda ◽  
Osamu Tsuda ◽  
Hisao Kanda
Keyword(s):  
Boron Nitride ◽  
Single Crystals ◽  
Hexagonal Boron Nitride ◽  
Band Edge ◽  
Edge Region ◽  
Time Resolved ◽  
Time Resolved Photoluminescence

Control of Spontaneous Emission from Colloidal Quantum Dots in a Polymer Microcavity

2006 ◽  
Vol 959 ◽  
Author(s):  
Vinod Menon ◽  
Nikesh Valappil ◽  
Iosef Zeylikovich ◽  
Taposh Gayen ◽  
Bidyut Das ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Spontaneous Emission ◽  
Defect Layer ◽  
Bragg Reflectors ◽  
Spontaneous Emission Rate ◽  
Time Resolved ◽  
One Dimensional ◽  
The One ◽  
Time Resolved Photoluminescence ◽  
Temperature Time

ABSTRACTWe report the fabrication of a one dimensional microcavity structure embedded with colloidal CdSe/ZnS core/shell quantum dots using solution processing. The microcavity structures were fabricated by spin coating alternating layers of polymers of different refractive indices (poly-vinylcarbazole, and poly-acrylic acid) to form the distributed Bragg reflectors (DBRs). Greater than 90% reflectivity was obtained using ten periods of the structure. The one dimensional microcavity was formed by sandwiching a λ/n thick defect layer between two such DBRs. The microcavity demonstrated directionality in emission and well behaved dispersion characteristics. Room temperature time-resolved photoluminescence measurements carried out on this structure showed six fold enhancement of spontaneous emission rate. The photoluminescence decay time of the quantum dots was found to be ∼ 1 ns while for the quantum dots embedded in the microcavity it was ∼150 ps.

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