激光阈值
材料科学
光电子学
放大自发辐射
激光器
增益开关
染料激光器
亚苯基
电子迁移率
光学
聚合物
复合材料
波长
物理
作者
Qi Wei,Yan Li,Jingguan Liu,Qiyun Fang,Jiewei Li,Xiaohong Yan,Linghai Xie,Yan Qian,Ruidong Xia,Wei Huang
标识
DOI:10.1002/adom.201601003
摘要
High performance organic lasers with both good optical lasing property and desirable carrier mobility still remains a big challenge for realizing electrically pumped organic lasing. In this work, we have developed a carbazole‐end‐capped ladder‐type oligo‐(p‐phenylene) based hybrid oligomer as solution‐processable deep blue laser gain media to reach a good balance between optical property and carrier transporting ability, by introducing moderate steric hindrance into the pi‐conjugated planar oligo‐(p‐phenylene) backbone. This material demonstrates excellent laser performance and moderate hole mobility of 1 × 10 –3 cm 2 V −1 s −1 . The 1‐D distributed feedback (DFB) laser exhibits very low lasing threshold of 0.6 nJ pulse −1 and high slope efficiency of 5.9 ± 0.3% (50% fill factor). More importantly, the prominent ASE performance maintained at very thin film samples. The amplified spontaneous emission (ASE) threshold remains very low (16 nJ pulse −1 ) in the 45 nm‐thickness film. These results might indicate possibilities for electrically pumped gain materials.
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