Photoluminescence quenching at a polythiophene/C-60 heterojunction
2000 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 61, no 19, 12957-12963 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2000. Vol. 61, no 19, 12957-12963 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-49741DOI: 10.1103/PhysRevB.61.12957OAI: oai:DiVA.org:liu-49741DiVA: diva2:270637