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A new pyrene cored small organic molecule with a flexible alkyl spacer: a potential solution processable blue emitter with bright photoluminescence
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2017-08-22 00:00:00 , DOI: 10.1039/c7nj01921a Nitin G. Valsange 1, 2, 3, 4 , F. L. Wong 5, 6, 7, 8 , Durgaprasad Shinde 1, 2, 3, 4, 9 , C. S. Lee 5, 6, 7, 8 , V. A. L. Roy 5, 6, 7, 8 , Sergei Manzhos 10, 11, 12, 13 , K. Feron 14, 15, 16 , Samuel Chang 17, 18, 19, 20, 21 , Ryuzi Katoh 17, 18, 19, 20, 21 , Prashant Sonar 16, 22, 23, 24 , Prakash P. Wadgaonkar 1, 2, 3, 4
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2017-08-22 00:00:00 , DOI: 10.1039/c7nj01921a Nitin G. Valsange 1, 2, 3, 4 , F. L. Wong 5, 6, 7, 8 , Durgaprasad Shinde 1, 2, 3, 4, 9 , C. S. Lee 5, 6, 7, 8 , V. A. L. Roy 5, 6, 7, 8 , Sergei Manzhos 10, 11, 12, 13 , K. Feron 14, 15, 16 , Samuel Chang 17, 18, 19, 20, 21 , Ryuzi Katoh 17, 18, 19, 20, 21 , Prashant Sonar 16, 22, 23, 24 , Prakash P. Wadgaonkar 1, 2, 3, 4
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A new pyrene cored small organic molecule viz. 1,3,6,8-tetrakis(4-((5-(9H-carbazol-9-yl)pentyl)oxy)phenyl)pyrene (PY-II) was designed and synthesized. The carbazole moiety with an alkyl spacer was introduced at 1, 3, 6 and 8 positions of the pyrene core to improve the charge transport properties and solution processability. PY-II exhibited excellent solubility in common organic solvents and high thermal stability up to 345 °C. The photoluminescence quantum yield (PLQY) of PY-II in solution was found to be 0.9 with bright blue emission near 450 nm which is just appropriate for the human eye. The solution processed non-doped OLED device fabricated using PY-II as an emissive layer afforded a pure blue emission with CIE coordinates of 0.16 and 0.16, a power efficiency of 0.17 lm W−1, a maximum current efficiency of 0.41 cd A−1 and a maximum brightness of 202 cd m−2.
中文翻译：
具有柔性烷基间隔基的新型pyr核有机小分子：潜在溶液可加工的蓝色发光体，具有明亮的光致发光
一种新的以core为核心的有机小分子，即。设计并合成了1,3,6,8-四（4-（（5-（9 H-咔唑-9-基戊基氧基戊基）氧基）苯基）py（PY-II）。在alkyl核的1、3、6和8位引入具有烷基间隔基的咔唑部分，以改善电荷传输性能和溶液可加工性。PY-II在普通有机溶剂中显示出极好的溶解性，并在高达345°C的温度下具有很高的热稳定性。发现溶液中PY-II的光致发光量子产率（PLQY）为0.9，在450 nm附近有亮蓝色发射，这恰好适合人眼。使用PY-II进行溶液处理的非掺杂OLED器件作为发射层，提供了纯蓝色发射，其CIE坐标为0.16和0.16，功率效率为0.17 lm W -1，最大电流效率为0.41 cd A -1，最大亮度为202 cd m -2。
更新日期：2017-09-11
中文翻译：
具有柔性烷基间隔基的新型pyr核有机小分子：潜在溶液可加工的蓝色发光体，具有明亮的光致发光
一种新的以core为核心的有机小分子，即。设计并合成了1,3,6,8-四（4-（（5-（9 H-咔唑-9-基戊基氧基戊基）氧基）苯基）py（PY-II）。在alkyl核的1、3、6和8位引入具有烷基间隔基的咔唑部分，以改善电荷传输性能和溶液可加工性。PY-II在普通有机溶剂中显示出极好的溶解性，并在高达345°C的温度下具有很高的热稳定性。发现溶液中PY-II的光致发光量子产率（PLQY）为0.9，在450 nm附近有亮蓝色发射，这恰好适合人眼。使用PY-II进行溶液处理的非掺杂OLED器件作为发射层，提供了纯蓝色发射，其CIE坐标为0.16和0.16，功率效率为0.17 lm W -1，最大电流效率为0.41 cd A -1，最大亮度为202 cd m -2。
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