Spectroscopic study of DCM as an active medium for luminescent solar concentrators

Triplet States of the Nonlinear Optical Chromophore DCM in Single Crystals of Potassium Hydrogen Phthalate and Their Relationship to Single-Molecule Dark States

“…DCM (Figure ) is efficient in laser gain media, as a solar concentrator, and is a model nonlinear optical chromophore . It undergoes a large change in dipole moment upon excitation, giving rise to solvatochromism that is further complicated by cis−trans photoisomerism and the possibility of so-called twisted intramolecular charge transfer (TICT) states .…”

Isomers and Rotamers of DCM in Methanol and in Gas Phase Probed by Ion Mobility Mass Spectrometry in Combination with High Performance Liquid Chromatography

“…DCM, an acronym for the compound 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4 H -pyran, is a styrene derivative (Figure ) and widely used as a fluorescent laser dye. − In methanol, the longest wavelength absorption maximum of DCM appears at ∼465 nm, and it emits with a large quantum yield of fluorescence (0.43) that has an emission maximum at ∼630 nm. , The emission maximum can be tuned easily by changing the medium polarity. The dye is also used extensively for the purpose of cell imaging , and in numerous industrial applications, viz., in solar concentrators, as a photonic material , and in organic electroluminescent devices such as organic light-emitting diodes (OLEDs). − Because of its widespread applications, much effort has been invested to understand its detailed photophysical properties in diverse media. ,− An important issue in this regard is the distribution of the molecule in its different isomeric forms in the ground state, which could originate as a result of trans – cis orientations of the dimethylaniline and pyran moieties about the central double bond and also due to internal rotation of the pyran moiety about the C 13 –C 15 single bond (Figure ). ,,,,,, This distribution is important because in a number of earlier studies it has been suggested that the optical and spectroscopic properties of the isomers of DCM could be different. ,,, The present study is devoted to distinguishing the isomers of DCM in methanol and in gas phase in terms of structure, spectral properties, relative abundances, and intermolecular reactive collisions.…”

“…5,6 The emission maximum can be tuned easily by changing the medium polarity. The dye is also used extensively for the purpose of cell imaging 7,8 and in numerous industrial applications, viz., in solar concentrators, 9 as a photonic material 10,11 and in organic electroluminescent devices such as organic light-emitting diodes (OLEDs). 12−17 Because of its widespread applications, much effort has been invested to understand its detailed photophysical properties in diverse media.…”

Quantum dots for Luminescent Solar Concentrators

“…The range of luminescent materials has greatly increased since this initial research and has resulted in a recent resurgence in LSC research with a huge range of lumiphores being tested including organic dyes, [7][8][9][10][11][12][13][14][15][16][17][18][19] metal oxides, 6,[20][21][22][23][24][25] metal complexes, [26][27][28][29][30][31] semiconducting polymers, 32 dye-sensitised C 60 33 and even protein complexes. 34 While the main application of this technology is concentration of solar energy upon PV cells, several other approaches have also come to light including indoor illumination, 35,36 greenhouse applications 37 and organic laser pumping.…”