One- and two-photon stimulated emission in oligothiophenes single crystals

Fichou, Denis; Dumarcher, V.; Nunzi, Jean‐Michel

doi:10.1016/s0925-3467(99)00047-6

Cited by 13 publications

(19 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since then, ASE have been confirmed in many organic crystals . Up to now, several classes of molecular crystalline materials have been demonstrated to exhibit ASE phenomena, such as oligothiophenes , oligo(p‐phenylene) , thiophene/phenylene co‐oligomers , fluorene/phenylene co‐oligomers , bis‐Styrylbenzene derivatives , cyano derivatives . In this section, we will introduce some typical organic laser crystals.…”

Section: Building Materials and Growth Technique For Laser Crystalsmentioning

confidence: 99%

Functional organic single crystals for solid-state laser applications

Fang

Yang

Feng

et al. 2014

Laser & Photonics Reviews

170

132

View full text Add to dashboard Cite

Because of long-range order and high chemical purity, organic crystals have exhibit unique properties and attracted a lot of interest for application in solid-state lasers. As optical gain materials, they exhibit high stimulated emission cross section and broad tunable wavelength emission as similar to their amorphous counterpart; moreover, high purity and high order give them superior properties such as low scattering trap densities, high thermal stability, as well as highly polarized emission. As electronic materials, they are potentially able to support high current densities, thus making it possible to realize current driven lasers. This paper mainly describes recent research progress in organic semiconductor laser crystals. The building molecules, crystal growth methods, as well as their stimulated emission characteristics related with crystal structures are introduced; in addition, the current state-of-the-art in the field of crystal laser devices is reviewed. Furthermore, recent advances of crystal lasers at the nanoscale and single crystal light-emitting transistors (LETs) are presented. Finally, an outlook and personal view is provided on the further developments of laser crystals and their applications.

show abstract

Section: Building Materials and Growth Technique For Laser Crystalsmentioning

confidence: 99%

Functional organic single crystals for solid-state laser applications

Fang

Yang

Feng

et al. 2014

Laser & Photonics Reviews

170

132

View full text Add to dashboard Cite

show abstract

“…26 In compound 6 the HOMO is delocalized over all fragments of the molecule, except for the crown ethers, whereas the H (5,6,8,9) H (3,11) LUMO is mainly localized on the thiophene fragments. Therefore, it can be considered that the long wavelength absorption band in the spectrum of compound 6 is caused by the intramolecular charge transfer from the donor to acceptor part of the molecule (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Electronic absorption(1)(2)(3) and fluorescence emission (1´-3´) spectra of compounds 4b, 5, and 6 in MeCN; the con centration of compounds 4b, 5, and 6 is 2•10 -5 mol L -1 , the optical path length is 10 mm, and the excitation wavelength, λ/nm: 300 (4b)General view of the HOMO and LUMO for compounds 4b and 6.4b, HOMO4b, LUMO6, HOMO 6, LUMO served in the extended conjugated system of electropo lymerization.…”

mentioning

confidence: 99%

Novel crown-containing 3-styryl derivatives of oligothiophenes: synthesis, structure, and optical and electrochemical characteristics

et al. 2009

View full text Add to dashboard Cite

A method for the synthesis of the 3 substituted polythiophene derivatives including two crown containing styryl fragments was proposed. The optical properties of the obtained com pounds are characterized by the presence of intense absorption and fluorescence bands. The oxidation to the thiophene derivatives involves the crown containing styryl fragment and should be sensitive to the presence of the metal cation in the crown ether cavity.The intensive development of chemistry of poly thiophenes is associated with their electronic and optical properties, which makes it possible to use these compounds for the creation of efficient field transistors, 1,2 organic la ser diodes, 3 cells of solar batteries, 4 and electrolumines cence devices. 5 Specific functionalization of conducting thiophene polymers is important for the development of chemical sensors with high sensitivity and stability. 6-8 In particu lar, crown ethers with ionophoric properties and covalent ly linked with polythiophenes undergo complex formation reactions with metal ions to change considerably the opti cal and electrochemical characteristics of the whole sys tem, thus providing these compounds with the properties of efficient sensors.Crown containing polythiophenes were first obtained 9 in 1993, when the starting monomers represented bis thiophenes linked at positions 3,3´ by the polyether chain. Crown annelated polythiophenes were studied, 10-13 and aza and oxathiacrown ethers containing three thiophene fragments were obtained. 14,15 Oligothiophenes linked with the crown ether fragment through the spacer were synthe sized. 16-19 The influence of complex formation of the thiophene containing crown ethers on their optical and electrochemical characteristics was described only in sev eral works 9,10,12,13,15 for several cations (Na, K, Ba, Sr, Pb) and, therefore, studies in this direction are significant for the development of new efficient receptors.We have earlier 20,21 reported the synthesis and proper ties of new crown containing bis(2 styryl)polythiophenes. The compounds demonstrated the properties of optical and electrochemical sensors for alkaline earth metal cat ions. A distinctive feature of the compounds is their ability to intermolecular sandwich organization in the presence of cations with larger sizes and in monolayers. The forma tion of intermolecular aggregates considerably decreased the intensity of the absorption and fluorescence spectra of the molecules and increased their electrochemical activi ty. In the present work, we developed methods for the synthesis of earlier unknown crown containing 3 styryl n = 0, R = H; n = 1,2, R =

show abstract

“…Two-photon absorption (TPA) is a nonlinear optical (NLO) process that involves the simultaneous absorption of two photons of identical or different frequencies, leading to the excitation of a molecule from the ground state to a higher energy electronic state. 1 TPA-related processes such as nonlinear transmission and intensity-dependent refraction can be exploited in a plethora of optoelectronic devices such as waveguides, 2 optical switches, 3 lasers, 4 optical limiters, 5 and 3-dimensional optical data storage systems. 6 TPA can also be used to trigger subsequent events, such as fluorescence or chemical reactions, which enable applications such as biological imaging, 7 photodynamic therapy, 8 and 3-dimensional lithography.…”

Section: Introductionmentioning

confidence: 99%