TY - JOUR
T1 - Opto-electronic properties of quasi-linear, self-assembled platinum complexes : Pt-Pt distance dependence
AU - Debije, M.G.
AU - Haas, de, M.P.
AU - Warman, J.M.
AU - Fontana, M.
AU - Stutzmann, N.
AU - Kristiansen, M.
AU - Caseri, W.R.
AU - Smith, P.
AU - Hoffmann, S.
AU - Solling, T. I.
PY - 2004
Y1 - 2004
N2 - Charge-carrier mobilities of various self-assembled platinum complexes were measured by time-resolved microwave conductivity techniques in the temperature range –80 to +100¿°C. Eight compounds were investigated in the present study, including the original Magnus' green salt ([Pt(NH3)4][PtCl4]) and derivatives with the general structure [Pt(NH2R)4][PtCl4], where R denotes an alkyl side chain. In one instance, the chlorines were substituted with bromines. For these complexes, which all consist of a linear backbone of platinum atoms with Pt–Pt distances, d, varying from 3.1 to =¿3.6¿Å, a strong, inverse correlation was found between d and the one-dimensional charge-carrier mobility, Sµ1D. The highest value of Sµ1D at room temperature was observed for R¿=¿(S)-3,7-dimethyloctyl (dmoc) with Sµ1D =¿0.06¿cm2¿V–1¿s–1. Almost all materials exhibited a charge-carrier mobility that was relatively independent of the temperature over the range studied. One exceptional compound (R¿=¿(R)-2-ethylhexyl) showed a pronounced negative temperature dependence of the charge-carrier mobility; upon decreasing the temperature from +100¿°C to –80¿°C the charge-carrier mobility increased by a factor of about ten.
AB - Charge-carrier mobilities of various self-assembled platinum complexes were measured by time-resolved microwave conductivity techniques in the temperature range –80 to +100¿°C. Eight compounds were investigated in the present study, including the original Magnus' green salt ([Pt(NH3)4][PtCl4]) and derivatives with the general structure [Pt(NH2R)4][PtCl4], where R denotes an alkyl side chain. In one instance, the chlorines were substituted with bromines. For these complexes, which all consist of a linear backbone of platinum atoms with Pt–Pt distances, d, varying from 3.1 to =¿3.6¿Å, a strong, inverse correlation was found between d and the one-dimensional charge-carrier mobility, Sµ1D. The highest value of Sµ1D at room temperature was observed for R¿=¿(S)-3,7-dimethyloctyl (dmoc) with Sµ1D =¿0.06¿cm2¿V–1¿s–1. Almost all materials exhibited a charge-carrier mobility that was relatively independent of the temperature over the range studied. One exceptional compound (R¿=¿(R)-2-ethylhexyl) showed a pronounced negative temperature dependence of the charge-carrier mobility; upon decreasing the temperature from +100¿°C to –80¿°C the charge-carrier mobility increased by a factor of about ten.
U2 - 10.1002/adfm.200305046
DO - 10.1002/adfm.200305046
M3 - Article
SN - 1616-301X
VL - 14
SP - 323
EP - 328
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 4
ER -