NDLI: MAPLE-deposited PFO films: influence of the laser fluence and repetition rate on the film emission and morphology

Content Provider	Springer Nature Link
Author	Caricato, A. P. Anni, M. Cesaria, M. Lattante, S. Leggieri, G. Leo, C. Marti, M. Perulli, A. Resta, V.
Copyright Year	2015
Abstract	The Matrix-Assisted Pulsed Laser Evaporation (MAPLE) technique is emerging as an alternative route to the conventional methods for depositing organic materials, although the MAPLE-deposited films very often present high surface roughness and characteristic morphological features. Films of the blue-emitting polymer, poly(9,9-dioctylfluorene)—PFO, have been deposited by MAPLE to investigate the influence of the laser fluence and repetition rate on both their topography and emission properties. The laser fluence has been changed from 150 up to 450 mJ/cm2, while laser repetition rates of 2 and 10 Hz have been considered. The interplay/relationship between the topography and the emission properties of the MAPLE-deposited films has been studied by confocal microscopy, photoluminescence spectrometry and atomic force microscopy. It has been found that under high irradiation (fluence of 450 mJ/cm2) conditions, the sample surface is characterized by bubbles presenting the intrinsic PFO blue emission. Instead, while improvements in the film morphology can be observed for lowered fluence and laser repetition rate, green emission becomes predominant in such conditions. Such result is very interesting to better understand the MAPLE ablation mechanism, which is discussed in this study.
Starting Page	453
Ending Page	461
Page Count	9
File Format	PDF
ISSN	09462171
Journal	Applied Physics B
Volume Number	119
Issue Number	3
e-ISSN	14320649
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-03-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physics Physical Chemistry Laser Technology, Photonics Quantum Optics Optics, Optoelectronics, Plasmonics and Optical Devices Engineering
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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