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

[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.

[发布机构] Technical Information Center Oak Ridge Tennessee

[学科分类] 工程和技术（综合）

[关键词] Electroluminescence;Thin films;Optical microscopy;Efficiency;Photoluminescence