A doping mechanism for organic semiconductors derived from SXPS measurements on co-evaporated films of CuPc and TCNQ and on a TCNQ/CuPc interface

Thomas Mayer; Corinna Hein; Johanna Härter; Eric Mankel; Wolfram Jaegermann

doi:10.1117/12.794606

26 August 2008 A doping mechanism for organic semiconductors derived from SXPS measurements on co-evaporated films of CuPc and TCNQ and on a TCNQ/CuPc interface

Thomas Mayer, Corinna Hein, Johanna Härter, Eric Mankel, Wolfram Jaegermann

Author Affiliations +

Proceedings Volume 7052, Organic Photovoltaics IX; 705204 (2008) https://doi.org/10.1117/12.794606
Event: Photonic Devices + Applications, 2008, San Diego, California, United States

Abstract

Synchrotron induced photoelectron spectroscopy on in situ co-evaporated blends of CuPc and TCNQ and on TCNQ/CuPc interfaces is applied for monitoring the electronic interaction indicated in systematic shifts of the CuPc and TCNQ HOMO and core orbitals. These shifts correspond to a movement of the Fermi level within the HOMO LUMO energy gap. The shifts in CuPc induced by the interaction with TCNQ are similar in the composites and in the interface model experiment. At the interface an additional induced dipole potential can be measured. The interface-dipole plus the Fermile level shift add up to the work function difference of pure CuPc and TCNQ. We conclude that TCNQ forms a separate phase in CuPc rather than single isolated acceptor molecules. Charge transfer at the bulk hetero-junction induces the Fermi level variations, which may be called doping.

Citation Download Citation

Thomas Mayer, Corinna Hein, Johanna Härter, Eric Mankel, and Wolfram Jaegermann "A doping mechanism for organic semiconductors derived from SXPS measurements on co-evaporated films of CuPc and TCNQ and on a TCNQ/CuPc interface", Proc. SPIE 7052, Organic Photovoltaics IX, 705204 (26 August 2008); https://doi.org/10.1117/12.794606

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