Photoluminescence quenching at a polythiophene/C60 heterojunction

被引：214

作者：

Theander, M ^{[1
]}

Yartsev, A

Zigmantas, D

Sundström, V

Mammo, W

Andersson, MR

Inganäs, O

机构：

[1] Linkoping Univ, Dept Phys, IFM, Appl Phys Lab, S-58183 Linkoping, Sweden

[2] Univ Lund, Dept Phys Chem, S-22100 Lund, Sweden

[3] Chalmers Univ Technol, Dept Polymer Technol, S-41296 Gothenburg, Sweden

[4] Linkoping Univ, Dept Phys, IFM, Appl Phys Lab, S-58183 Linkoping, Sweden

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.61.12957

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Quenching of photoluminescence in a substituted polythiophene in the presence of a deposited C-60 layer is studied by steady-state and time-resolved photoluminescence (PL). The steady-state PL is evaluated by con -sidering the interference of the absorbed and emitted electro-optical field in the thin film coupled to exciton diffusion in the conjugated polymer. PL quenching occurs for excitons generated within 5 nm from the heterojunction. A blueshift of the polymer emission spectrum is observed when C-60 is deposited on top of a polymer thin film. The blueshift is shown to be caused by PL quenching before the excitation is transferred to the lowest-energy sites.

引用

页码：12957 / 12963

页数：7

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