TY - JOUR
T1 - Spin dynamics of carrier generation in a photoconductive C 60-doped poly(N-vinylcarbazole) film
AU - Ogiwara, Toshinari
AU - Ikoma, Tadaaki
AU - Akiyama, Kimio
AU - Tero-Kubota, Shozo
N1 - Funding Information:
We thank Mr. M. Nakai for his assistance in the time resolved-EPR measurements. This study was financially supported by a Grant-in-Aid for Scientific Research (No. 15310069) and Priority Area (417) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of the Japanese Government and the Murata Science Foundation.
PY - 2005/8/15
Y1 - 2005/8/15
N2 - The magnetic field effects on the carrier yield have been studied to clarify the spin dynamic process during photoinduced carrier generation in a fullerene (C60)-doped poly(N-vinylcarbazole) (PVCz) film. The charge transfer (CT) complex of C60 and the carbazole (Cz) chromophore is selectively excited. The total number of carriers that escaped from the geminate pairs decreases in the presence of magnetic fields, which arises from a hyperfine mechanism of the distant ion pairs involving C60- and Cz +. Time-resolved EPR measurements verify that the excited triplet state of C60 is produced via its excited singlet state generated from the contact ion pair. The competitive formation processes of distant ion pairs and the excited states of C60 from the contact ion pair are discussed.
AB - The magnetic field effects on the carrier yield have been studied to clarify the spin dynamic process during photoinduced carrier generation in a fullerene (C60)-doped poly(N-vinylcarbazole) (PVCz) film. The charge transfer (CT) complex of C60 and the carbazole (Cz) chromophore is selectively excited. The total number of carriers that escaped from the geminate pairs decreases in the presence of magnetic fields, which arises from a hyperfine mechanism of the distant ion pairs involving C60- and Cz +. Time-resolved EPR measurements verify that the excited triplet state of C60 is produced via its excited singlet state generated from the contact ion pair. The competitive formation processes of distant ion pairs and the excited states of C60 from the contact ion pair are discussed.
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U2 - 10.1016/j.cplett.2005.06.066
DO - 10.1016/j.cplett.2005.06.066
M3 - Article
AN - SCOPUS:22944474896
VL - 411
SP - 378
EP - 383
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 4-6
ER -