Abstract Charge (electrons and holes) balance engineering is employed to demonstrate an enhancement in the performance of organic light emitting diodes (OLEDs) fabricated with a near infra red thermally activated delayed fluorescence (TADF) molecule 7,10-Bis(4-(diphenylamino)phenyl)-2,3-dicyanopyrazino phenanthrene (TPA-DCPP) . The emissive layer of the OLED comprises of a guest-host matrix. A detailed analysis of the choice of host that is to be employed in the guest-host matrix of the emissive layer of the OLED is presented. The doping concentration of the guest in the emissive layer is optimized by photoluminescence (PL) studies. A comparative analysis of 1,4,5,8,9,11-Hexaazatriphenylenehexacarbonitrile (HATCN) and Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) PEDOT: PSS as hole injection layers and their effect on device efficiency and charge balance in the emissive layer of the device stack is presented. From the study, a red TADF OLED with a maximum external quantum efficiency of 13.2% at a luminance of 1 cd/m2 is demonstrated.

中文翻译：

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通过优化宾主矩阵和电荷平衡工程提高红色 TADF OLED 的效率

摘要 电荷（电子和空穴）平衡工程被用来证明用近红外热激活延迟荧光 (TADF) 分子 7,10-Bis(4-(diphenylamino) 制造的有机发光二极管 (OLED) 的性能增强。 )苯基)-2,3-二氰基吡嗪并菲(TPA-DCPP)。OLED 的发射层包括客体-主体矩阵。详细分析了将在 OLED 发光层的客体-主体矩阵中采用的主体选择。发光层中客体的掺杂浓度通过光致发光 (PL) 研究进行优化。1,4,5,8,9,11-六氮杂三亚苯基六甲腈（HATCN）和聚（3,4-亚乙基二氧噻吩）-聚（苯乙烯磺酸盐）PEDOT的对比分析：介绍了 PSS 作为空穴注入层及其对器件堆叠发射层中器件效率和电荷平衡的影响。该研究展示了在 1 cd/m2 亮度下具有 13.2% 最大外部量子效率的红色 TADF OLED。