Direct evidence for singlet-triplet exciton annihilation in π-conjugated 
polymers

List, E. J. W.; Scherf, Ullrich; Müllen, Klaus; Graupner, W.; Kim, C. H.; Shinar, J.

doi:10.1103/PhysRevB.66.235203

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Direct evidence for singlet-triplet exciton annihilation in π-conjugated polymers

MPS-Authors

/persons/resource/persons48459

Müllen, Klaus
MPI for Polymer Research, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

List, E. J. W., Scherf, U., Müllen, K., Graupner, W., Kim, C. H., & Shinar, J. (2002). Direct evidence for singlet-triplet exciton annihilation in π-conjugated polymers. Physical Review B, 66(23): 235203. doi:10.1103/PhysRevB.66.235203.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-646F-1

Abstract

A blend of two conjugated polymers with different optical band gaps and different triplet exciton (TE) magnetic resonance features was studied by means of photoinduced absorption (PA) and photoluminescence detected magnetic resonance. From the latter we find that a reduction of TE's on either of the two polymers enhances the radiative singlet exciton (SE) decay on both polymers nearly identically. The PA results rule out other possible mechanisms to yield this signal, except one: a long- range SE-TE annihilation due to a dipole-dipole transfer mechanism. Based on this finding, we calculate the transfer radius and quantify the annihilation process for this system and for other conjugated polymers.