Aggregation Quenching in Thin Films of MEH-PPV Studied by Near-Field Scanning Optical Microscopy and Spectroscopy.

Huser, T. ; Yan, M.

Technical Information Center Oak Ridge Tennessee

关键词: Electroluminescence;    Thin films;    Optical microscopy;    Efficiency;    Photoluminescence;   

RP-ID  :  DE200415007527

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Aggregates in thin films of conjugated polymers form excimer states and significantly reduce the photo- and electroluminescence efficiency in devices produced from these materials. We have studied the aggregate formation in thin films of MEH-PPV by near-field scanning optical microscopy and spectroscopy. Local photoluminescence spectroscopy and photo-bleaching experiments have been used to show that thin films of MEH-PPV are homogeneously aggregated and do not form aggregated domains.