Temporal response of optically pumped organic semiconductor lasers and its implication for reaching threshold under electrical excitation

Research output: Contribution to journalArticlepeer-review

77 Scopus citations

Abstract

We study the step response of optically pumped organic semiconductor lasers and find that lasing is sustained for <150 ns following pump turn on due to annihilation quenching of guest singlet with host triplet excitons. We derive a general criterion for reaching threshold that critically depends on the pump rise time, the singlet-triplet quenching rate, and the spin statistics of exciton formation. These results imply that singlet-triplet annihilation alone fundamentally restricts lasing by electrical excitation to conditions that are not practically feasible in organic semiconductors.

Original languageEnglish (US)
Article number073302
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number7
DOIs
StatePublished - Feb 11 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Temporal response of optically pumped organic semiconductor lasers and its implication for reaching threshold under electrical excitation'. Together they form a unique fingerprint.

Cite this