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.

Autore Pugliese

• Caricato Anna Paola , Martino Maurizio , Anni Marco

Tutti gli autori

• Caricato A.P. , Anni M. , Cesaria M. , Lattante S. , Leggieri G. , Leo C. , Martino M. , Perulli A. , Resta V.

Titolo volume/Rivista

APPLIED PHYSICS. B, LASERS AND OPTICS

Anno di pubblicazione

2015

ISSN

0946-2171

ISBN

Non Disponibile

Numero di citazioni Wos

3

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

2

Ultimo Aggiornamento Citazioni

24/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile