Sensitized Emission of Luminescent Lanthanide Complexes Based on 4-Naphthalen-1-yl-Benzoic Acid Derivatives by a Charge-Transfer Process

ChemPhysChem ◽  
2006 ◽  
Vol 7 (1) ◽  
pp. 213-221 ◽  
Author(s):  
Yong Hee Kim ◽  
Nam Seob Baek ◽  
Hwan Kyu Kim
Keyword(s):  
Charge Transfer ◽  
Benzoic Acid ◽  
Transfer Process ◽  
Lanthanide Complexes ◽  
Charge Transfer Process ◽  
Benzoic Acid Derivatives ◽  
A Charge

Optical Study of the Fe3+-Related Emission at 0.5 eV in InP:Fe

1992 ◽  
Vol 262 ◽  
Author(s):  
Klaus Pressel ◽  
G. Bohnert ◽  
A. Dörnen ◽  
K. Thonke
Keyword(s):  
Fourier Transform ◽  
Fine Structure ◽  
Charge Transfer ◽  
Transfer Process ◽  
Decay Time ◽  
Optical Study ◽  
Charge Transfer Process ◽  
Excitation Mechanism ◽  
Different Temperatures ◽  
A Charge

ABSTRACTThe 0.5 eV (2.5 μm 4000 cm1) emission band in InP has been studied by optical spectroscopy. By the use of Fourier-transform-infrared photoluminescence we have been able to observe at least a three-fold fine structure in the zero-phonon transitions at ∼ 4300 cm−1 which are studied at different temperatures. Based on the fine structure and the long decay time of 1.1 ms we ascribe the 0.5 eV emission to the 4T1 → 6A1 spin-flip transition of Fe3+. The excitation spectrum of this Fe3+-related emission shows a characteristic fine structure at ∼ 1.13 eV which belongs to a charge-transfer process of the type: Fe3+ + hv (1.13 eV) → [Fe2+, bound hole]. We discuss the excitation mechanism of the 0.5 eV emission by charge-transfer states and compare the results with an emission at 3057 cm1 in GaAs, which we attribute to the same Fe3+ transition (decay time: 1.9 ms).

Effect of hybrid SiO2@Ag nanoparticles with raspberry-like morphology on the excited states of the photosensitizers Rose Bengal and riboflavin

2019 ◽  
Vol 43 (23) ◽  
pp. 9123-9133 ◽  
Author(s):  
Joaquín E. Martínez Porcel ◽  
María Belén Rivas Aiello ◽  
Valeria B. Arce ◽  
Desire Di Silvio ◽  
Sergio E. Moya ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Charge Transfer ◽  
Triplet State ◽  
Excited States ◽  
Transfer Process ◽  
Rose Bengal ◽  
Ag Nanoparticles ◽  
Charge Transfer Process ◽  
A Charge

Ag+ is released due to a charge transfer process from the triplet state of adsorbed riboflavin to the silver nanoparticles.

Sign in / Sign up

Export Citation Format

Share Document