Optical properties of amorphous ultrathin films of perylene derivatives Export

@article{citeulike:1198269, abstract = {Ultrathin films of PTCDA and MePTCDI (submono/multilayers with thickness d = 0.01-10 ML), UHV-deposited on He-cooled quartz substrate, are studied in situ by cw and ps time-resolved fluorescence spectroscopy. The absorption spectrum, measured via photoexcitation, shows a monomer-like shape independent of film thickness, indicating an amorphous structure. The monotonic red-shift with increasing d reflects enhancement of isotropic intermolecular interaction. The fluorescence of ultrathin films consists of a single, monomeric component (M) exhibiting mirror symmetry to the absorption. With increasing film thickness a lower energy excimer-like component (E) emerges, gaining intensity at the expense of M due to energy transfer to E traps. The two components can be separated by time-resolved spectroscopy. Individual molecular behaviour can be studied in the limit of ultrathin films (< 0.03 ML), when E completely vanishes. {\copyright} 1997 Elsevier Science B.V.}, address = {3. Physikalisches Institut, Universita?t Stuttgart, D-70550 Stuttgart, Germany}, author = {Go?mez, U. and Leonhardt, M. and Port, H. and Wolf, H. C.}, citeulike-article-id = {1198269}, citeulike-linkout-0 = {http://www.scopus.com/record/display.url?view=extended&origin=resultslist&eid=2-s2.0-0031552335}, journal = {Chem. Phys. Lett.}, keywords = {amorphous, films, optical, perylene}, number = {1-2}, pages = {125--132}, posted-at = {2007-03-30 15:44:32}, priority = {2}, title = {Optical properties of amorphous ultrathin films of perylene derivatives}, url = {http://www.scopus.com/record/display.url?view=extended&origin=resultslist&eid=2-s2.0-0031552335}, volume = {268}, year = {1997} }

TY - JOUR ID - citeulike:1198269 L3 - citeulike-article-id:1198269 N2 - Ultrathin films of PTCDA and MePTCDI (submono/multilayers with thickness d = 0.01-10 ML), UHV-deposited on He-cooled quartz substrate, are studied in situ by cw and ps time-resolved fluorescence spectroscopy. The absorption spectrum, measured via photoexcitation, shows a monomer-like shape independent of film thickness, indicating an amorphous structure. The monotonic red-shift with increasing d reflects enhancement of isotropic intermolecular interaction. The fluorescence of ultrathin films consists of a single, monomeric component (M) exhibiting mirror symmetry to the absorption. With increasing film thickness a lower energy excimer-like component (E) emerges, gaining intensity at the expense of M due to energy transfer to E traps. The two components can be separated by time-resolved spectroscopy. Individual molecular behaviour can be studied in the limit of ultrathin films (< 0.03 ML), when E completely vanishes. © 1997 Elsevier Science B.V. IS - 1-2 JF - Chem. Phys. Lett. AD - 3. Physikalisches Institut, Universita?t Stuttgart, D-70550 Stuttgart, Germany EP - 132 TI - Optical properties of amorphous ultrathin films of perylene derivatives VL - 268 SP - 125 KW - amorphous KW - films KW - optical KW - perylene AU - Go?mez, U AU - Leonhardt, M AU - Port, H AU - Wolf, HC PY - 1997/// UR - http://www.scopus.com/record/display.url?view=extended&origin=resultslist&eid=2-s2.0-0031552335 ER -