CAJ | 학술논문

合成了两类分别基于芘和蒽封端的芴-芳胺衍生物(FAn, FPy)的新型可溶液加工蓝色发光分子,两种材料均溶于常规的有机溶剂,并且可以旋涂成膜.通过紫外-可见光谱和荧光光谱对其在溶液中和固态薄膜下的光学性能进行了表征,发现这两类分子在固态下发射峰分别位于449和465 nm,属于蓝色发光材料.并通过循环伏安法表征了其电化学性能,计算得出FAn和FPy的最高占据分子轨道(HOMO)能级分别为-5.37和-5.36 eV.结果表明N-己基二苯胺的引入有效阻止了分子在固态下的平面堆积,抑制了长波发射,并且提高了分子HOMO能级,改善了空穴注入能力.差示扫描量热法(DSC)和热重分析(TGA)测试表明这两类化合物均显示出良好的热稳定性,其中FAn的玻璃化转变温度和热分解温度分别达到了207和439°C.良好的性能使得这两类材料成为一种潜在的可溶液加工的蓝光材料.
합성료량류분별기우비화은봉단적물-방알연생물(FAn, FPy)적신형가용액가공람색발광분자,량충재료균용우상규적유궤용제,병차가이선도성막.통과자외-가견광보화형광광보대기재용액중화고태박막하적광학성능진행료표정,발현저량류분자재고태하발사봉분별위우449화465 nm,속우람색발광재료.병통과순배복안법표정료기전화학성능,계산득출FAn화FPy적최고점거분자궤도(HOMO)능급분별위-5.37화-5.36 eV.결과표명N-기기이분알적인입유효조지료분자재고태하적평면퇴적,억제료장파발사,병차제고료분자HOMO능급,개선료공혈주입능력.차시소묘량열법(DSC)화열중분석(TGA)측시표명저량류화합물균현시출량호적열은정성,기중FAn적파리화전변온도화열분해온도분별체도료207화439°C.량호적성능사득저량류재료성위일충잠재적가용액가공적람광재료.
Two novel potential solution-processed blue fluorescent emitters composed of a core fluorene-diphenylamine unit capped with either anthracene (FAn) or pyrene (FPy) were synthesized and characterized. They were both soluble in common organic solvents and solutions gave smooth films after spin coating. Their optical properties in solution and in the film were investigated by UV-visible and photoluminescence (PL) spectroscopy. The PL emission maximum of FAn and FPy in the film state were found to be 449 and 465 nm, respectively. The electrochemical properties of the as-prepared samples were studied by cyclic voltammetry. The estimated highest occupied molecular orbital (HOMO) energy levels were-5.37 and-5.36 eV for FAn and FPy, respectively. These results indicate that the introduction of diphenylamine effectively prevents plane stacking of the molecules in the solid state, which suppresses the formation of long-wavelength aggregates, and the high HOMO levels enhance the hole-injection ability of the compounds. The results of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) indicate that the two materials have excellent thermal stability with the glass transition temperature of FAn reaching 207 °C and the thermal decomposition temperature as high as 439 ° C. The good performance of the fluorescent emitters makes them promising candidates as solution-processed blue organic light-emitting diodes.