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首页> 外文期刊>ChemPlusChem >Polymer‐Based White‐Light‐Emitting Electrochemical Cells with Very High Color‐Rendering Index Based on Blue‐Green Fluorescent Polyfluorenes and Red‐Phosphorescent Iridium Complexes
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Polymer‐Based White‐Light‐Emitting Electrochemical Cells with Very High Color‐Rendering Index Based on Blue‐Green Fluorescent Polyfluorenes and Red‐Phosphorescent Iridium Complexes

机译:基于聚合物的白光电化学电池,基于蓝绿荧光多氟氟醚和红磷光铱络合物非常高的色彩渲染指数

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摘要

Abstract Application of the concept of three‐color (red (R), green (G), and blue (B)) light‐mixing to obtain white light is the most suitable way to realize white‐light‐emitting devices with very high color‐rendering indices (CRI). White‐light‐emitting devices based on the three‐color‐mixing method could be used to create lighting and display technologies. Here, white‐light‐emitting electrochemical cells (LECs) with very high CRIs are reported, which were fabricated by using blend films composed of a fluorescent π‐conjugated polymer (FCP), poly(9,9‐dioctylfluorene‐co‐benzothiadiazole) (PFBT), and a phosphorescent iridium complex, [Ir(ppy) 2 (biq)] + (PF 6 ) ? (where (ppy) ? =2‐phenylpyridinate and biq=2,2′‐biquinoline). The LECs fabricated with PFBT, the benzothiadiazole content of which is 0.01?mol?%, showed blue electroluminescence (EL) emission originating from the fluorene segments and green EL emission from the benzothiadiazole units simultaneously. White LECs were then realized by adding red‐emitting Ir complexes as guest molecules to the blue‐green‐emitting PFBT. By optimizing the proportions of the PFBT and Ir complexes in the active layers (PFBT/[Ir(ppy) 2 (biq)] + (PF 6 ) ? =1:0.2 (mass ratio)), white‐light emission with Commission Internationale de l′Eclairage (CIE) coordinates of (0.29, 0.34) and a very high CRI value of 91.5 was achieved through RGB color‐mixing. It was noted that the emission mechanism was based on F?rster resonance energy transfer and Dexter energy transfer from excited PFBT to [Ir(ppy) 2 (biq)] + (PF 6 ) ? . The utilization of LECs based on blue‐green FCPs and red Ir complexes looks very promising for the prospect of realizing white‐light‐emitting devices with very high CRIs.
机译:摘要应用三种概念(红色(r),绿色(g)和蓝色(b))光混合以获得白光是最合适的方式实现具有非常高的颜色的白光发射器件 - 调整指数(CRI)。基于三色混合方法的白光发光器件可用于创建照明和显示技术。这里,报告了具有非常高的CRIS的白光发光电化学电池(LEC),通过使用由荧光π-缀合的聚合物(FCP),聚(9,9-二辛基氟烯-CO-苯并噻唑)组成的共混膜来制造。 (PFBT)和磷光铱络合物,[IR(PPY)2(BIQ)] +(PF 6)? (其中(PPY)?= 2-苯基吡啶和BIQ = 2,2'-百喹啉)。用PFBT制造的LECS,其苯并噻唑含量为0.01Ω·摩尔··倍数,显示出来自芴段的蓝色电致发光(EL)发射,同时从苯并噻唑单元中产生绿色EL发射。然后通过将红发红外复合物作为客体分子添加到蓝绿发射PFBT的情况下实现白色LEC。通过优化活性层中PFBT和IR复合物的比例(PFBT / [IR(PPY)2(BIQ)] +(PF 6)?= 1:0.2(质量比)),与委员会国际的白光发射通过RGB颜色混合实现(0.29,0.34)的(CIE)坐标(CIE)坐标(0.29,0.34)的坐标和91.5的非常高的CRI值。注意到,排放机制基于F?脊柱阵线共振能量转移和从激发的PFBT到[IR(PPY)2(BIQ)] +(PF 6)的糊精能量转移? 。基于蓝绿色FCP和红红外红外复合物的LEC的利用对于实现具有非常高的克里斯的白光发光装置的前景看起来非常有前景。

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