激发态
光诱导电子转移
巴克敏斯特富勒烯
光致发光
光化学
电子转移
材料科学
激发
皮秒
亚稳态
光激发
电子顺磁共振
富勒烯
聚合物
酞菁
电子受体
化学
原子物理学
核磁共振
光电子学
纳米技术
光学
有机化学
物理
激光器
量子力学
复合材料
作者
Niyazi Serdar Sariciftci,Laura Smilowitz,A. J. Heeger,Fred Wudl
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:1992-11-27
卷期号:258 (5087): 1474-1476
被引量:4063
标识
DOI:10.1126/science.258.5087.1474
摘要
Evidence for photoinduced electron transfer from the excited state of a conducting polymer onto buckminsterfullerene, C(60), is reported. After photo-excitation of the conjugated polymer with light of energy greater than the pi-pi* gap, an electron transfer to the C(60) molecule is initiated. Photoinduced optical absorption studies demonstrate a different excitation spectrum for the composite as compared to the separate components, consistent with photo-excited charge transfer. A photoinduced electron spin resonance signal exhibits signatures of both the conducting polymer cation and the C(60) anion. Because the photoluminescence in the conducting polymer is quenched by interaction with C(60), the data imply that charge transfer from the excited state occurs on a picosecond time scale. The charge-separated state in composite films is metastable at low temperatures.
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