| Direct measurement of the triplet exciton diffusion length in organic semiconductors. | |
| | |
MedLine Citation:
|
PMID: 22540725 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
We present a new method to measure the triplet exciton diffusion length in organic semiconductors. N,N^{'}-di-[(1-naphthyl)-N,N^{'}-diphenyl]-1,1^{'}-biphenyl)-4,4^{'}-diamine (NPD) has been used as a model system. Triplet excitons are injected into a thin film of NPD by a phosphorescent thin film, which is optically excited and forms a sharp interface with the NPD layer. The penetration profile of the triplet excitons density is recorded by measuring the emission intensity of another phosphorescent material (detector), which is doped into the NPD film at variable distances from the injecting interface. From the obtained triplet penetration profile we extracted a triplet exciton diffusion length of 87±2.7 nm. For excitation power densities >1 mW/mm^{2} triplet-triplet annihilation processes can significantly limit the triplet penetration depth into organic semiconductor. The proposed sample structure can be further used to study excitonic spin degree of freedom. |
| | |
Authors:
|
Oleksandr V Mikhnenko; Roald Ruiter; Paul W M Blom; Maria Antonietta Loi |
Related Documents
:
|
19173565 - Spontaneous polarization of the neutral interface for valence asymmetric coulombic syst... 22772215 - Laser-induced forward transfer-printing of focused ion beam pre-machined crystalline ma... 11688875 - Axial birefringence in high-numerical-aperture optical systems and the light distributi... 22274265 - Design of t-shaped nanophotonic wire waveguide for optical interconnection in h-tree ne... 22502265 - Technical scheme and optimization of precision timing and synchronization for underwate... 16238405 - Dynamics in a room-temperature ionic liquid: a computer simulation study of 1,3-dimethy... |
Publication Detail:
|
Type: Journal Article Date: 2012-03-29 |
Journal Detail:
|
Title: Physical review letters Volume: 108 ISSN: 1079-7114 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2012 Mar |
Date Detail:
|
Created Date: 2012-04-30 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
|
Languages: eng Pagination: 137401 Citation Subset: IM |
Affiliation:
|
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands and Dutch Polymer Institute, P.O. Box 902, 5600 AX, Eindhoven, The Netherlands. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Electric-field control of nonvolatile magnetization in co_{40}fe_{40}b_{20}/pb(mg_{1/3}nb_{2/3})_{0....
Next Document: Temperature-Pressure Scaling for Air-Fluidized Grains near Jamming.