Photoinduced absorption of conjugated polymer/C60 solutions: Evidence of triplet‐state photoexcitations and triplet‐energy transfer in poly(3‐alkylthiophene)

We present spectral evidence of the efficient photogeneration of triplet‐state excitations in poly(3‐alkylthiophene), P3AT, solutions. The steady‐state photoinduced absorption spectra display a PIA band centered at 1.50 eV which is attributed to a dipole‐allowed triplet–triplet transition. Photoexcitation of P3AT solutions containing C60, results in an efficient energy transfer reaction and provides an estimate for the P3AT triplet‐state energy of 1.57–1.72 eV.

[1]  F. Garnier,et al.  Photochemical Generation of Radical Cations from Thiophene Oligomers , 1994 .

[2]  Lee,et al.  Direct evidence of photoinduced electron transfer in conducting-polymer-C60 composites by infrared photoexcitation spectroscopy. , 1994, Physical review. B, Condensed matter.

[3]  Bradley,et al.  Photoinduced absorption of polymer solutions. , 1993, Physical review. B, Condensed matter.

[4]  Moses,et al.  Sensitization of the photoconductivity of conducting polymers by C60: Photoinduced electron transfer. , 1993, Physical review. B, Condensed matter.

[5]  Daniel Moses,et al.  Ultrafast photoinduced electron transfer in conducting polymer—buckminsterfullerene composites , 1993 .

[6]  Friedman,et al.  Electronic absorption spectra in C60- and C60+ , 1993, Physical review. B, Condensed matter.

[7]  M. Baumgarten,et al.  EPR and optical absorption spectra of reduced buckminsterfullerene , 1993 .

[8]  Manikandan Jayaraman,et al.  Self-orienting head-to-tail poly(3-alkylthiophenes): new insights on structure-property relationships in conducting polymers , 1993 .

[9]  Wu,et al.  Photoexcitation spectroscopy of conducting-polymer-C60 composites: Photoinduced electron transfer. , 1993, Physical review. B, Condensed matter.

[10]  R. Friend,et al.  Photoinduced absorption of polyalkylthienylenevinylenes , 1993 .

[11]  D. Moses,et al.  ODMR spectroscopy of photoexcitations in C60 and C70 polystyrene glasses , 1993 .

[12]  Manikandan Jayaraman,et al.  Design, synthesis, and control of conducting polymer architectures: structurally homogeneous poly(3-alkylthiophenes) , 1993 .

[13]  A. J. Heeger,et al.  Photoinduced Electron Transfer from a Conducting Polymer to Buckminsterfullerene , 1992, Science.

[14]  Tubino,et al.  Optical excitations of poly-3-alkylthiophene films and solutions. , 1992, Physical review. B, Condensed matter.

[15]  L. Biczók,et al.  External heavy atom induced phosphorescence emission of fullerenes: the energy of triplet C60 , 1992 .

[16]  S. Sibley,et al.  A photoluminescence study of C60 and C70 , 1992 .

[17]  D. S. Pearson,et al.  Molecular characterization of poly(3-hexylthiophene) , 1991 .

[18]  S. Gorun,et al.  Production, spectroscopy, and electronic structure of soluble fullerene ions , 1991 .

[19]  Y. Achiba,et al.  Electronic absorption spectra of the radical anions and cations of fullerenes: C60 and C70 , 1991 .

[20]  A. Bolognesi,et al.  Photoexcitation spectroscopy of poly-3-alkylthiophenes , 1991 .

[21]  Voss,et al.  Substitution effects on bipolarons in alkoxy derivatives of poly(1,4-phenylene-vinylene). , 1991, Physical review. B, Condensed matter.

[22]  Fred Wudl,et al.  Two different fullerenes have the same cyclic voltammetry , 1991 .

[23]  Bradley,et al.  Photoexcited states in poly(p-phenylene vinylene): Comparison with trans,trans-distyrylbenzene, a model oligomer. , 1990, Physical review. B, Condensed matter.

[24]  Juan C. Scaiano,et al.  EFFICIENCY OF THE PHOTOPROCESSES LEADING TO SINGLET OXYGEN ( 1 δg) GENERATION BY α‐TERTHIENYL: OPTICAL ABSORPTION, OPTOACOUSTIC CALORIMETRY AND INFRARED LUMINESCENCE STUDIES* , 1990 .

[25]  J. Scaiano,et al.  Photochemical generation of radical cations from .alpha.-terthienyl and related thiophenes: kinetic behavior and magnetic field effects on radical-ion pairs in micellar solution , 1990 .

[26]  A. Heeger,et al.  Electronic properties of conjugated polymers in solution: Persistence lengths and photoinduced absorption , 1989 .

[27]  Kim,et al.  Photoexcitation and doping studies of poly(3-hexylthienylene). , 1988, Physical review. B, Condensed matter.

[28]  Alan J. Heeger,et al.  Solitons in conducting polymers , 1988 .

[29]  Paul D. Townsend,et al.  Photo-excitation in conjugated polymers , 1987 .

[30]  Robert C. Haddon,et al.  Electronic structure and bonding in icosahedral C60 , 1986 .

[31]  Alan J. Heeger,et al.  Solitons in polyacetylene , 1979 .

[32]  N. Turro.  Modern Molecular Photochemistry , 1978 .