Novel bis(fluorenyl)benzothiadiazole-cored carbazole dendrimers as highly efficient solution-processed non-doped green emitters for organic light-emitting diodes
Bis(fluorenyl)benzothiadiazole-cored carbazole dendrimers show high thermal and electrochemical stability, and great potential as solution processed hole-transporting non-doped green emitters for OLEDs. A pure green device with CIE coordinates of (0.27, 0.62) and high luminance efficiencies (up to 10.01 cd A−1) is achieved, respectively.
双(芴基)苯并噻二唑包芯咔唑树枝状聚合物具有很高的热稳定性和电化学稳定性,作为溶液加工的空穴传输非掺杂绿色发光体用于有机发光二极管具有巨大潜力。这种纯绿色器件的 CIE 坐标分别为 (0.27, 0.62) 和高光效(高达 10.01 cd A-1)。
Carbazole Dendrimers as Solution-Processable Thermally Activated Delayed-Fluorescence Materials
Recently, thermallyactivated delayed fluorescence (TADF) materials have received increasing attention as effective emitters for organic light‐emitting diodes (OLEDs). However, most of them are usually employed as dopants in a host material. In this report, carbazoledendrimers with a triphenyl‐s‐triazine core are reported, which are the first solution‐processable, non‐doped, high‐molecular‐weight
Synthesis and fast electron-transfer reactions of fullerene–carbazole dendrimers with short linkages
作者:Mohamed E. El-Khouly、Sang-Ho Lee、Kwang-Yol Kay、Shunichi Fukuzumi
DOI:10.1039/c3nj00770g
日期:——
carbazole to the singlet-excited state of C60 producing the charge-separatedstates (C60˙−–(carbazole)n˙+) with lifetimes of 1.25–1.30 ns. The complementary nanosecond transient absorption measurements in the microsecond region revealed that the charge-separatedstates decayed to populate the triplet states of C60, as well as the ground states. The higher charge separation/charge recombination ratios
Highly efficient carbazolylgold(<scp>iii</scp>) dendrimers based on thermally activated delayed fluorescence and their application in solution-processed organic light-emitting devices
Solution-processed organiclight-emitting diodes (OLEDs) based on these gold(III) dendrimers have been fabricated, which exhibit a maximum current efficiency of 52.6 cd A−1, maximum external quantum efficiency of 15.8% and high power efficiency of 41.3 lm W−1. The operational stability of these OLEDs has also been recorded, with the devices based on zero- and second-generation dendrimers showing maximum
设计并合成了一类新的含 C^C^N 配体的咔唑基金 ( III ) 树枝状聚合物。观察到固态薄膜中高达 82% 的高光致发光量子产率和大约 10 5 s -1 的大辐射衰减率常数。发现这些金 ( III ) 树枝状聚合物表现出热激活延迟荧光 (TADF),这得到了变温发射光谱、时间分辨光致发光衰减和计算研究的支持。已经制造出基于这些金 ( III ) 树枝状聚合物的溶液处理有机发光二极管 (OLED) ,其最大电流效率为 52.6 cd A -1, 15.8% 的最大外量子效率和 41.3 lm W -1 的高功率效率。还记录了这些 OLED 的操作稳定性,基于零代和第二代树枝状聚合物的器件在 100 cd m -2 下的最大半衰期分别为 1305 和 322 小时,代表了操作稳定解决方案的首次演示-基于金(III)树枝状聚合物加工的OLED 。