White Light Emitting Polymers from a Luminogen with Local Polarity Induced Enhanced Emission

被引:21
作者
Ananthakrishnan, Soundaram J. [1 ,3 ]
Varathan, E. [1 ,2 ,3 ]
Subramanian, V. [1 ,2 ,3 ]
Somanathan, N. [1 ,2 ,3 ]
Mandal, Asit B. [1 ,2 ,3 ]
机构
[1] Network Inst Solar Energy, CSIR, New Delhi, India
[2] Acad Sci & Innovat Res, New Delhi 110001, India
[3] Cent Leather Res Inst, CSIR, Madras 600020, Tamil Nadu, India
关键词
AGGREGATION-INDUCED EMISSION; NEAR-INFRARED FLUORESCENCE; POLYFLUORENE COPOLYMERS; SINGLE POLYMER; PIEZOFLUOROCHROMIC PROPERTIES; PHOTOPHYSICAL PROPERTIES; OPTICAL-PROPERTIES; SIMULTANEOUS BLUE; MOLECULAR DESIGN; SOLID EMITTERS;
D O I
10.1021/jp5068439
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Aggregation induced enhanced emission (AIEE) is considered as an important tool to circumvent the aggregation caused quenching (ACQ) effect in organic light emitting diodes (OLEDs). Charge trapping and surplus long wavelength electroluminescence is a cause of concern in single polymer based white OLEDs. However, the potential of luminogens with AIEE property as a credible tool to offset the above problems in white light emitting single polymer is not properly explored. In this study design, synthesis and spectral characterization of a polymerizable luminogen, (2Z,2'Z)-6,6'-(2,7-dibromo-9H-fluorene-9,9-diyl)bis(hexane-6,1-diyl)bis(2-cyano-3-(10-hexyl-10H-phenothiazin-3-yl)acrylate(FCPA) with AIEE property and its copolymers is presented. Lippert-Mataga studies showed that reduced local polarity caused by aliphatic chains in condensed state of FCPA resulted in AIEE property. The copolymers P(FCPA-1) and P(FCPA-0.5) with 1% and 0.5% FCPA moieties showed white electroluminescence and enhanced thin film photoluminescence that matched very closely. The superior performance of OLEDs is attributed to the presence of a phenothiazine group in FCPA that resulted in nearly equal electron and hole injection barriers.
引用
收藏
页码:28084 / 28094
页数:11
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