Zhang Yu, Li Jie, Quan Yiwu, Ye Shanghui, Cheng Yixiang
Key Laboratory of High Performance Polymer Materials and Technology, of Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China.
Key Lab of Mesoscopic Chemistry of MOE and Jiangsu Key Laboratory, of Advanced Organic Materials, School of Chemistry and Chemical, Engineering, Nanjing University, Nanjing, 210023, P. R. China.
Chemistry. 2021 Jan 7;27(2):589-593. doi: 10.1002/chem.202003721. Epub 2020 Dec 3.
By combining the blue and orange CPL or functionalized bis-benzoxanethones emitters (S-/R-BN-tCz and S-/R-BN-PXZ), warm white CP-OLEDs were fabricated using solution-processed single emitting layer strategy. The successful realization of white CP-EL benefited from the same stable binaphthyl chirality and similar rigid structure of the two emissive CPL emitters. The devices exhibited the low turn-on voltage of ≈4.3 V, maximum luminance of ≈10200 cd m and maximum current efficiency of ≈2.0 cd A . Most significantly, the devices with CIE coordinates of (0.32, 0.45) displayed intense CP-EL signals in the spectral range of 450 to 650 nm, and showed stable g values of ≈10 as the luminance increased from 100 to 6000 cd m . To the best of our knowledge, this work provides for the first time a simple and feasible strategy to fabricate solution-processed white CP-OLEDs based on the co-doping of the CPL emitters.
通过结合蓝色和橙色圆偏振发光（CPL）或功能化双苯并恶嗪酮发光体（S-/R-BN-tCz和S-/R-BN-PXZ），采用溶液处理单发光层策略制备了暖白色圆偏振有机发光二极管（CP-OLED）。白色圆偏振电致发光（CP-EL）的成功实现得益于两种发光CPL发光体相同的稳定联萘手性和相似的刚性结构。这些器件表现出约4.3 V的低开启电压、约10200 cd m的最大亮度和约2.0 cd A的最大电流效率。最显著的是，CIE坐标为(0.32, 0.45)的器件在450至650 nm光谱范围内显示出强烈的CP-EL信号，并且随着亮度从100增加到6000 cd m，g值稳定在约10。据我们所知，这项工作首次提供了一种基于CPL发光体共掺杂来制备溶液处理白色CP-OLED的简单可行策略。
