Exciplex formation in solid state blends of charge-transfer type AFX dyes and bisimide compounds

Matthew J. Dalton; David J. Stewart; Ramamurthi Kannan; Rachel N. Swiger; Dominic L. Orseno; Joy E. Haley; Thomas M. Cooper; Loon-Seng Tan

doi:10.1117/12.931674

19 October 2012 Exciplex formation in solid state blends of charge-transfer type AFX dyes and bisimide compounds

Matthew J. Dalton, David J. Stewart, Ramamurthi Kannan, Rachel N. Swiger, Dominic L. Orseno, Joy E. Haley, Thomas M. Cooper, Loon-Seng Tan

Author Affiliations +

Proceedings Volume 8474, Optical Processes in Organic Materials and Nanostructures; 847407 (2012) https://doi.org/10.1117/12.931674
Event: SPIE Organic Photonics + Electronics, 2012, San Diego, California, United States

Abstract

We have been studying exciplex formation in nonlinear optical materials containing a high concentration of 2PA chromophores (AFX dyes) as a means to enhance the nonlinear optical properties. A number of dipolar AFX dyes having various electron-accepting moieties (π-excess and π-deficient examples) and three bisimide compounds having substituents with varying electron-withdrawing power were synthesized to study exciplex formation in their solid state blends. In substrate supported thin films of various equimolar blends containing an AFX dye and bisimide, the dye monomer emission was severely quenched, and a new emission, red-shifted by up to 110 nm, appeared. The emission energies were consistent with the charge recombination energy calculated from the energy levels of the donor and acceptor present in the blend, which confirmed the emission was from an exciplex. Time resolved emission measurements also indicated the presence of much longer lived transients in the blends, consistent with exciplex formation. Spectroelectrochemistry confirmed that the radical cations of these dyes had strong absorption in the NIR region, so exciplex formation is a means to enhance nonlinear optical absorption of the dyes in this spectral region.

Citation Download Citation

Matthew J. Dalton, David J. Stewart, Ramamurthi Kannan, Rachel N. Swiger, Dominic L. Orseno, Joy E. Haley, Thomas M. Cooper, and Loon-Seng Tan "Exciplex formation in solid state blends of charge-transfer type AFX dyes and bisimide compounds", Proc. SPIE 8474, Optical Processes in Organic Materials and Nanostructures, 847407 (19 October 2012); https://doi.org/10.1117/12.931674

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Absorption

Solid state physics

Thin films

Solids

Electrodes

Near infrared

Transient nonlinear optics

Show All Keywords

Keywords/Phrases

Search In:

Publication Years