Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Quantifying the Efficiency of Förster-Assisted Optical Gain in Semiconducting Polymer Blends by Excitation Wavelength Selective Amplified Spontaneous Emission
Year:2016
Research Areas
  • Physics chemical and mathematical
Information
Abstract
We study the correlation between Förster resonance energy transfer (FRET) and optical gain properties in conjugated polymer blends based on regioregular poly(3-hexylthiophene) (P3HT) and poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT). First, FRET dynamics are investigated with femtosecond transient absorption spectroscopy observing a sub-picosecond energy transfer from F8BT to P3HT (550 fs) at medium doping levels (40% wt P3HT in F8BT). Amplified spontaneous emission (ASE) is then characterized in blends upon exciting predominantly the host and guest polymers, respectively. The corresponding density of absorbed photons at threshold conditions is compared upon host or guest photoexcitation as a method to quantitatively determine the FRET-assisted ASE efficiencies. We observe a reduction in ASE efficiency upon host photoexcitation of 20%, in the best case, respect to guest photoexcitation. Our results confirm that even in strongly coupled host:guest mixtures delayed exciton population by energy transfer is subtle to losses ascribed to exciton-exciton annihilation.
International
Si
JCR
Si
Title
Journal of Polymer Science Part B: Polymer Physics
ISBN
0887-6266
Impact factor JCR
3,83
Impact info
Volume
54
10.1002/polb.24141
Journal number
From page
2311
To page
2317
Month
AGOSTO
Ranking
Participants
  • Autor: Longfei Wu (UPM)
  • Autor: Feng Luo
  • Autor: Larry Lüer
  • Autor: Beatriz Romero
  • Autor: Jose Manuel Oton Sanchez (UPM)
  • Autor: Qi Zhang
  • Autor: Ruidong Xia
  • Autor: Juan Cabanillas Gonzalez
Research Group, Departaments and Institutes related
  • Creador: Departamento: Tecnología Fotónica y Bioingeniería
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)