Optical properties of nondegenerate ground-state polymers: Three dioxythiophene-based conjugated polymers

被引:76
作者
Hwang, J [1 ]
Tanner, DB
Schwendeman, I
Reynolds, JR
机构
[1] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[2] Univ Florida, Dept Chem, Gainesville, FL 32611 USA
关键词
D O I
10.1103/PhysRevB.67.115205
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report the optical properties of three dioxythiophene-based conjugated polymers: poly(3,4-ethylenedioxythiophene) poly(3,4-propylenedioxythiophene), and poly(3,4-(2,2-dimethylpropylenedioxy)thiophene). Films of ca. 200 nm thickness of these polymers were prepared on indium-tin-oxide coated glass substrates using a potentiostatic electropolymerization method. The reflectance and transmittance of the samples were measured over a broad energy range from the midinfrared through the ultraviolet. To extract the optical constants of the polymers, we modeled all of the layers of this multilayer thin-film structure using a Drude-Lorentz model. From the parameters obtained, we compute the optical constants, such as absorption coefficient and frequency-dependent conductivity. These functions yield information about the electronic structure of the neutral and doped polymers, which show evidence for polaron states at low doping and bipolarons at the maximum doping level. We observed doping-dependent changes in the electronic structure of these polymers as well as doping-induced infrared-active vibrational modes.
引用
收藏
页数:10
相关论文
共 34 条
[1]  
Bevington R., 1969, DATA REDUCTION ERROR
[2]   COMPARATIVE THEORETICAL-STUDY OF THE DOPING OF CONJUGATED POLYMERS - POLARONS IN POLYACETYLENE AND POLYPARAPHENYLENE [J].
BREDAS, JL ;
CHANCE, RR ;
SILBEY, R .
PHYSICAL REVIEW B, 1982, 26 (10) :5843-5854
[3]   HIGHLY CONDUCTING POLYPARAPHENYLENE, POLYPYRROLE, AND POLYTHIOPHENE CHAINS - AN ABINITIO STUDY OF THE GEOMETRY AND ELECTRONIC-STRUCTURE MODIFICATIONS UPON DOPING [J].
BREDAS, JL ;
THEMANS, B ;
FRIPIAT, JG ;
ANDRE, JM ;
CHANCE, RR .
PHYSICAL REVIEW B, 1984, 29 (12) :6761-6773
[4]   ELECTRICAL-CONDUCTIVITY IN DOPED POLYACETYLENE [J].
CHIANG, CK ;
FINCHER, CR ;
PARK, YW ;
HEEGER, AJ ;
SHIRAKAWA, H ;
LOUIS, EJ ;
GAU, SC ;
MACDIARMID, AG .
PHYSICAL REVIEW LETTERS, 1977, 39 (17) :1098-1101
[5]   AMPLITUDE AND PHASE MODES IN TRANSPOLYACETYLENE - RESONANT RAMAN-SCATTERING AND INDUCED INFRARED ACTIVITY [J].
EHRENFREUND, E ;
VARDENY, Z ;
BRAFMAN, O ;
HOROVITZ, B .
PHYSICAL REVIEW B, 1987, 36 (03) :1535-1553
[6]   INFRARED-ACTIVE VIBRATIONAL-MODES OF CHARGED SOLITONS IN (CH)X AND (CD)X [J].
ETEMAD, S ;
PRON, A ;
HEEGER, AJ ;
MACDIARMID, AG ;
MELE, EJ ;
RICE, MJ .
PHYSICAL REVIEW B, 1981, 23 (10) :5137-5141
[7]   OPTO-ELECTROCHEMICAL SPECTROSCOPY OF TRANS-(CH)X [J].
FELDBLUM, A ;
KAUFMAN, JH ;
ETEMAD, S ;
HEEGER, AJ ;
CHUNG, TC ;
MACDIARMID, AG .
PHYSICAL REVIEW B, 1982, 26 (02) :815-826
[8]   OPTICAL-ABSORPTION FROM POLARONS IN A MODEL OF POLYACETYLENE [J].
FESSER, K ;
BISHOP, AR ;
CAMPBELL, DK .
PHYSICAL REVIEW B, 1983, 27 (08) :4804-4825
[9]   DONOR AND ACCEPTOR STATES IN LIGHTLY DOPED POLYACETYLENE, (CH)X [J].
FINCHER, CR ;
OZAKI, M ;
HEEGER, AJ ;
MACDIARMID, AG .
PHYSICAL REVIEW B, 1979, 19 (08) :4140-4148
[10]   Electronic absorption and vibrational spectroscopies of conjugated conducting polymers [J].
Furukawa, Y .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (39) :15644-15653