Efficient photo and electroluminescence of regioregular poly(alkylthiophene)s
Piotr Barta , Franco Cacialli , Richard H. Friend , Małgorzata Zagórska
AbstractWe report absolute photoluminescence (PL) and electroluminescence quantum efficiencies for thin films and polymer light-emitting diodes prepared with regioregular (that is, exclusively head-to-head/tail-to-tail conformation and/or exclusively head-to-tail conformation) poly(alkylthiophenes). In particular, we find a maximum PL quantum efficiency of \#x223c;11\% for the head-to-head/tail-to-tail conformers, an order of magnitude higher than for the head-to-tail conformers. The results show that chemical conformation plays a crucial role in determining the material electronic structure and, hence, the relevant optical properties. The results are significant to the wide field of conjugated, synthetic, light-emitting materials, and hence to the development of large-area organic displays. \#xa9; 1998 American Institute of Physics.
|Journal series||Journal of Applied Physics, ISSN 0021-8979|
|Keywords in English||electroluminescence, light emitting diodes, organic semiconductors, photoluminescence, polymer films|
|Publication indicators||: 2006 = 2.316 (2) - 2007=2.38 (5)|
|Citation count*||77 (2015-02-22)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.