Heo Yeongjae, Kwon Hyukmin, Park Sangwook, Dae Sunwoo, Lee Hayoon, Lee Kiho, Park Jongwook
Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Gyeonggi 17104, Republic of Korea.
Molecules. 2023 Nov 8;28(22):7485. doi: 10.3390/molecules28227485.
In this study, we introduced the weak electron-accepting oxazole derivative 4,5-diphenyl-2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)oxazole (TPO) into both anthracene and pyrene moieties of a dual core structure. Ultimately, we developed 2-(4-(6-(anthracen-9-yl)pyren-1-yl)phenyl)-4,5-diphenyloxazole (AP-TPO) as the substitution on the second core, pyrene, and 4,5-diphenyl-2-(4-(10-(pyren-1-yl)anthracen-9-yl)phenyl)oxazole (TPO-AP) as the substitution on the first core, anthracene. Both materials exhibited maximum photoluminescence wavelengths at 433 and 443 nm in solution and emitted deep blue light with high photoluminescence quantum yields of 82% and 88%, respectively. When used as the emitting layer in non-doped devices, TPO-AP outperformed AP-TPO, achieving a current efficiency of 5.49 cd/A and an external quantum efficiency of 4.26% in electroluminescence. These materials introduce a new category of deep blue emitters in the organic light-emitting diodes field, combining characteristics related to the electron transport layer.
在本研究中，我们将弱电子接受性恶唑衍生物4,5-二苯基-2-(4-(4,4,5,5-四甲基-1,3,2-二氧杂硼烷-2-基)苯基)恶唑（TPO）引入双核结构的蒽和芘部分。最终，我们开发了2-(4-(6-(蒽-9-基)芘-1-基)苯基)-4,5-二苯基恶唑（AP-TPO）作为第二个核心芘上的取代物，以及4,5-二苯基-2-(4-(10-(芘-1-基)蒽-9-基)苯基)恶唑（TPO-AP）作为第一个核心蒽上的取代物。两种材料在溶液中的最大光致发光波长分别为433和443 nm，并分别以82%和88%的高光致发光量子产率发射深蓝色光。当用作非掺杂器件的发光层时，TPO-AP的性能优于AP-TPO，在电致发光中实现了5.49 cd/A的电流效率和4.26%的外量子效率。这些材料在有机发光二极管领域引入了一类新型深蓝色发射体，兼具与电子传输层相关的特性。
