This background stimulated us to design a new acetylenic monomer, 9-(10-hexoxycarbonylanthrylacet... more This background stimulated us to design a new acetylenic monomer, 9-(10-hexoxycarbonylanthrylacetylene), 1 (Scheme 1), with the motivation of producing an acetylene-based widely conjugated polymer having excellent solubility and stability as ...
We have studied the optical properties of thin films of novel disubstituted acetylene polymers su... more We have studied the optical properties of thin films of novel disubstituted acetylene polymers such as poly(1-phenyl-2-p-n-butylphenylacetylene) (PDPA-nBu) and poly(1-n-hexyl-2-phenylacetylene) (PHxPA), that show high photoluminescence (PL) quantum efficiency in comparison with unsubstituted or monosubstituted polyacetylene. The polarization dependence of PL and Raman scattering of PDPA-nBu and PHxPA have been studied in order to clarify the emission mechanism. Assuming the model
Jpn. J. Appi. Phys. Vol. 36 (1997) pp. L 1268-L 1271 Part 2, No. 9A/B, 15 September 1997 Spectral... more Jpn. J. Appi. Phys. Vol. 36 (1997) pp. L 1268-L 1271 Part 2, No. 9A/B, 15 September 1997 Spectral Narrowing of Emission in Di-substituted Polyacetylene Sergey V. Frolov, Maxim Shkunov, Z. Valy Vardeny, Kazuya Tada1, Rahmat Hidayat1, Masaharu HlROHATA1, Masahiro ...
Jpn. J. Appl. Phys. Vol. 37 (1998) pp. L 180–L 183 Part 2, No. 2A, 1 February 1998 c 1998 Publica... more Jpn. J. Appl. Phys. Vol. 37 (1998) pp. L 180–L 183 Part 2, No. 2A, 1 February 1998 c 1998 Publication Board, Japanese Journal of Applied Physics ... Photoluminescence and Electroluminescence in Polymer Mixture of Poly(alkylphenylacetylene) and Poly(diphenylacetylene) Derivatives
The electrical characteristics and photoirradiation effects of a conducting polymer/C60 heterojun... more The electrical characteristics and photoirradiation effects of a conducting polymer/C60 heterojunction device with C,, doped conducting polymer layer were investigated in contrast to those of non-doped device. The C,, doping to conducting polymer layer should be effective not only to improve short circuit photocurrent but also to reduce the serial resistance of the conducting polymer layer. Both effects can be interpreted in terms of photoinduced charge transfer between conducting polymer and C,,.
Comparative study of optical properties of alkylthio-group-substituted phthalocyanine rare-earth ... more Comparative study of optical properties of alkylthio-group-substituted phthalocyanine rare-earth metal sandwich complexes ([(CnS)8Pc]2M,M=Eu,Lu,Tb) is presented. Photoluminescence and photoconductivity of [(CnS)8Pc]2M complex is very weak. Two photoluminescence bands were observed at around 400-650 and 720-800 nm in chloroform solution corresponding to the Soret and Q bands in the absorption spectra, respectively. However, the emission from Eu3+ ion (as well as Tb3+)
Intense photoluminescence (PL) is observed in di-substituted polyacetylene derivatives even thoug... more Intense photoluminescence (PL) is observed in di-substituted polyacetylene derivatives even though solitonic mid-gap absorption is observed upon doping, contrary to non-substituted trans-polyacetylene and mono-substituted polyacetylene in which strong PL is not ...
Jpn. J. Appl. Phys. Vol. 38 (1999) pp. 931–935 Part 1, No. 2A, February 1999 c 1999 Publication B... more Jpn. J. Appl. Phys. Vol. 38 (1999) pp. 931–935 Part 1, No. 2A, February 1999 c 1999 Publication Board, Japanese Journal of Applied Physics ... Electronic Properties and Electroluminescence of Monosubstituted Polyacetylenes and Their Mixtures with Disubstituted Polyacetylene
Electroluminescence (EL) and photoluminescence (PL) have been studied in polyacetylene derivative... more Electroluminescence (EL) and photoluminescence (PL) have been studied in polyacetylene derivatives with various substituents. Intense green and blue ELs are observed in poly(diphenylacetylene)s and in poly( I-alkyl-2-phenylacetylene)s, respectively. While, red PL and EL in mono-substituted polyacetylene derivatives are much weaker. Detailed dependence of EL and PL on molecular structure of substituents have been discussed. Spectral narrowing of PL and lasing have also been realized with intense excitation.
Photoluminescence (PL) and electroluminescence (EL) of mixtures of polyacetylene derivatives with... more Photoluminescence (PL) and electroluminescence (EL) of mixtures of polyacetylene derivatives with dih'erent substituents have been studied in detail. Remarkable spectral shift of PL and EL from blue to green by changing the concentration of poly(diphenylacetylene) (PDPA) derivatives in poly(alkylphenylacetylene) (PAPA) derivatives has been observed. Marked quenching of PL and EL intensities has been found out in disubstituted polyacetylene such as PDPA derivatives upon introduction of monosubstituted polvacetylene. Dependence of PL decay time on molar ratio proportion of mixtures have been also studied. These characteristics have been discussed in terms of fast interchain interaction such as excitation energy transfer between polyacetylene derivatives with djfrerent molecular structures.
This background stimulated us to design a new acetylenic monomer, 9-(10-hexoxycarbonylanthrylacet... more This background stimulated us to design a new acetylenic monomer, 9-(10-hexoxycarbonylanthrylacetylene), 1 (Scheme 1), with the motivation of producing an acetylene-based widely conjugated polymer having excellent solubility and stability as ...
We have studied the optical properties of thin films of novel disubstituted acetylene polymers su... more We have studied the optical properties of thin films of novel disubstituted acetylene polymers such as poly(1-phenyl-2-p-n-butylphenylacetylene) (PDPA-nBu) and poly(1-n-hexyl-2-phenylacetylene) (PHxPA), that show high photoluminescence (PL) quantum efficiency in comparison with unsubstituted or monosubstituted polyacetylene. The polarization dependence of PL and Raman scattering of PDPA-nBu and PHxPA have been studied in order to clarify the emission mechanism. Assuming the model
Jpn. J. Appi. Phys. Vol. 36 (1997) pp. L 1268-L 1271 Part 2, No. 9A/B, 15 September 1997 Spectral... more Jpn. J. Appi. Phys. Vol. 36 (1997) pp. L 1268-L 1271 Part 2, No. 9A/B, 15 September 1997 Spectral Narrowing of Emission in Di-substituted Polyacetylene Sergey V. Frolov, Maxim Shkunov, Z. Valy Vardeny, Kazuya Tada1, Rahmat Hidayat1, Masaharu HlROHATA1, Masahiro ...
Jpn. J. Appl. Phys. Vol. 37 (1998) pp. L 180–L 183 Part 2, No. 2A, 1 February 1998 c 1998 Publica... more Jpn. J. Appl. Phys. Vol. 37 (1998) pp. L 180–L 183 Part 2, No. 2A, 1 February 1998 c 1998 Publication Board, Japanese Journal of Applied Physics ... Photoluminescence and Electroluminescence in Polymer Mixture of Poly(alkylphenylacetylene) and Poly(diphenylacetylene) Derivatives
The electrical characteristics and photoirradiation effects of a conducting polymer/C60 heterojun... more The electrical characteristics and photoirradiation effects of a conducting polymer/C60 heterojunction device with C,, doped conducting polymer layer were investigated in contrast to those of non-doped device. The C,, doping to conducting polymer layer should be effective not only to improve short circuit photocurrent but also to reduce the serial resistance of the conducting polymer layer. Both effects can be interpreted in terms of photoinduced charge transfer between conducting polymer and C,,.
Comparative study of optical properties of alkylthio-group-substituted phthalocyanine rare-earth ... more Comparative study of optical properties of alkylthio-group-substituted phthalocyanine rare-earth metal sandwich complexes ([(CnS)8Pc]2M,M=Eu,Lu,Tb) is presented. Photoluminescence and photoconductivity of [(CnS)8Pc]2M complex is very weak. Two photoluminescence bands were observed at around 400-650 and 720-800 nm in chloroform solution corresponding to the Soret and Q bands in the absorption spectra, respectively. However, the emission from Eu3+ ion (as well as Tb3+)
Intense photoluminescence (PL) is observed in di-substituted polyacetylene derivatives even thoug... more Intense photoluminescence (PL) is observed in di-substituted polyacetylene derivatives even though solitonic mid-gap absorption is observed upon doping, contrary to non-substituted trans-polyacetylene and mono-substituted polyacetylene in which strong PL is not ...
Jpn. J. Appl. Phys. Vol. 38 (1999) pp. 931–935 Part 1, No. 2A, February 1999 c 1999 Publication B... more Jpn. J. Appl. Phys. Vol. 38 (1999) pp. 931–935 Part 1, No. 2A, February 1999 c 1999 Publication Board, Japanese Journal of Applied Physics ... Electronic Properties and Electroluminescence of Monosubstituted Polyacetylenes and Their Mixtures with Disubstituted Polyacetylene
Electroluminescence (EL) and photoluminescence (PL) have been studied in polyacetylene derivative... more Electroluminescence (EL) and photoluminescence (PL) have been studied in polyacetylene derivatives with various substituents. Intense green and blue ELs are observed in poly(diphenylacetylene)s and in poly( I-alkyl-2-phenylacetylene)s, respectively. While, red PL and EL in mono-substituted polyacetylene derivatives are much weaker. Detailed dependence of EL and PL on molecular structure of substituents have been discussed. Spectral narrowing of PL and lasing have also been realized with intense excitation.
Photoluminescence (PL) and electroluminescence (EL) of mixtures of polyacetylene derivatives with... more Photoluminescence (PL) and electroluminescence (EL) of mixtures of polyacetylene derivatives with dih'erent substituents have been studied in detail. Remarkable spectral shift of PL and EL from blue to green by changing the concentration of poly(diphenylacetylene) (PDPA) derivatives in poly(alkylphenylacetylene) (PAPA) derivatives has been observed. Marked quenching of PL and EL intensities has been found out in disubstituted polyacetylene such as PDPA derivatives upon introduction of monosubstituted polvacetylene. Dependence of PL decay time on molar ratio proportion of mixtures have been also studied. These characteristics have been discussed in terms of fast interchain interaction such as excitation energy transfer between polyacetylene derivatives with djfrerent molecular structures.
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