TY - JOUR
T1 - PEDOT
T2 - PSS polymeric conducting anode for admittance spectroscopy
AU - Tsang, S. W.
AU - Tse, S. C.
AU - Tong, K. L.
AU - So, S. K.
PY - 2006/12
Y1 - 2006/12
N2 - The carrier mobilities of two hole transporting organic materials were evaluated by admittance spectroscopy (AS). The materials were 4,4′,4″-tris{N,-(3-methylphenyl)-N-phenylamino}triphenylamine (m-MTDATA) and N,N′-diphenyl-N,N′-bis(1,1′-biphenyl)-4,4′-diamine (NPB). They were sandwiched in a configuration of anode/organic material/cathode. The anode was either indium-tin-oxide (ITO) or poly(3,4-ethylenedioxythiophene) doped with polystrenesulphonic acid (PEDOT:PSS). It is shown that PEDOT:PSS can, respectively, form Ohmic and quasi-Ohmic contact with m-MTDATA and NPB. Using PEDOT:PSS as the anode, the average hole mobilities of m-MTDATA and NPB were extracted by AS through susceptance analysis. The results are in excellent agreement with those obtained by an independent time-of-flight (TOF) technique. With PEDOT:PSS, the application of AS for characterizing carrier mobilities can be extended to hole transporting organic materials with highest occupied molecular orbital (HOMO) energy levels down to 5.4 eV. © 2006 Elsevier B.V. All rights reserved.
AB - The carrier mobilities of two hole transporting organic materials were evaluated by admittance spectroscopy (AS). The materials were 4,4′,4″-tris{N,-(3-methylphenyl)-N-phenylamino}triphenylamine (m-MTDATA) and N,N′-diphenyl-N,N′-bis(1,1′-biphenyl)-4,4′-diamine (NPB). They were sandwiched in a configuration of anode/organic material/cathode. The anode was either indium-tin-oxide (ITO) or poly(3,4-ethylenedioxythiophene) doped with polystrenesulphonic acid (PEDOT:PSS). It is shown that PEDOT:PSS can, respectively, form Ohmic and quasi-Ohmic contact with m-MTDATA and NPB. Using PEDOT:PSS as the anode, the average hole mobilities of m-MTDATA and NPB were extracted by AS through susceptance analysis. The results are in excellent agreement with those obtained by an independent time-of-flight (TOF) technique. With PEDOT:PSS, the application of AS for characterizing carrier mobilities can be extended to hole transporting organic materials with highest occupied molecular orbital (HOMO) energy levels down to 5.4 eV. © 2006 Elsevier B.V. All rights reserved.
KW - Admittance spectroscopy
KW - Carrier mobility
KW - Carrier transport
KW - Injection
KW - Ohmic contact
KW - PEDOT
KW - Susceptance
UR - http://www.scopus.com/inward/record.url?scp=33750980986&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-33750980986&origin=recordpage
U2 - 10.1016/j.orgel.2006.06.002
DO - 10.1016/j.orgel.2006.06.002
M3 - RGC 21 - Publication in refereed journal
SN - 1566-1199
VL - 7
SP - 474
EP - 479
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
IS - 6
ER -