The role of the β-phase content on the stimulated emission of poly(9,9-dioctylfluorene) thin films

被引:18
作者
Anni, M. [1 ]
机构
[1] Univ Salento, Dipartimento Ingn Innovaz, I-73100 Lecce, Italy
关键词
D O I
10.1063/1.2957669
中图分类号
O59 [应用物理学];
学科分类号
摘要
We investigated the optical gain properties of poly(9,9-dioctylfluorene) thin films as a function of the beta-phase content. We demonstrate that the product between the gain cross section and the excited state lifetime of the beta-phase is about 3.2 times larger than the glassy-phase one, indicating that the beta-phase molecules, for a given pump density, have higher gain than the glassy-phase ones. The dependence of the amplified spontaneous emission threshold on the molecular properties, on the waveguide losses, and on the beta-phase content is also quantitatively discussed. (C) 2008 American Institute of Physics.
引用
收藏
页数:3
相关论文
共 20 条
[1]   Microscopic investigation of the excitons' intermolecular energy migration in the β phase of poly(9,9-dioctylfluorene) by confocal laser spectroscopy [J].
Anni, M. ;
Caruso, M. E. ;
Lattante, S. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (08) :2958-2963
[2]   Exciton migration in β-phase poly(9,9-dioctylfluorene) -: art. no. 195333 [J].
Ariu, M ;
Sims, M ;
Rahn, MD ;
Hill, J ;
Fox, AM ;
Lidzey, DG ;
Oda, M ;
Cabanillas-Gonzalez, J ;
Bradley, DDC .
PHYSICAL REVIEW B, 2003, 67 (19)
[3]  
AZUAM H, 2007, ORG ELECTRON, V8, P184
[4]  
Berggren M, 1997, NATURE, V389, P466
[5]   Tuneability of amplified spontaneous emission through control of the thickness in organic-based waveguides -: art. no. 093103 [J].
Calzado, EM ;
Villalvilla, JM ;
Boj, PG ;
Quintana, JA ;
Díaz-García, MA .
JOURNAL OF APPLIED PHYSICS, 2005, 97 (09)
[6]   Real-time investigation of solvent swelling induced β-phase formation in poly(9,9-dioctylfluorene) [J].
Caruso, M. E. ;
Anni, M. .
PHYSICAL REVIEW B, 2007, 76 (05)
[7]   Microscopic investigation of the poly(9,9-dioctylfluorene) photoluminescence dependence on the deposition conditions by confocal laser microscopy [J].
Caruso, ME ;
Lattante, S ;
Cingolani, R ;
Anni, M .
APPLIED PHYSICS LETTERS, 2006, 88 (18)
[8]   Interplay of physical structure and photophysics for a liquid crystalline polyfluorene [J].
Grell, M ;
Bradley, DDC ;
Ungar, G ;
Hill, J ;
Whitehead, KS .
MACROMOLECULES, 1999, 32 (18) :5810-5817
[9]   Emission characteristics and performance comparison of polyfluorene lasers with one- and two-dimensional distributed feedback [J].
Heliotis, G ;
Xia, RD ;
Turnbull, GA ;
Andrew, P ;
Barnes, WL ;
Samuel, IDW ;
Bradley, DDC .
ADVANCED FUNCTIONAL MATERIALS, 2004, 14 (01) :91-97
[10]   Semiconducting polymers: A new class of solid-state laser materials [J].
Hide, F ;
DiazGarcia, MA ;
Schwartz, BJ ;
Andersson, MR ;
Pei, QB ;
Heeger, AJ .
SCIENCE, 1996, 273 (5283) :1833-1836