Two coumarin derivatives containing electron-transporting benzoxazolyl moiety, 7-(diethylamino)-3-(benzoxazol-2-yl)coumarin (DABOC) and 3-(benzoxazol-2-yl)benzo[5,6]coumarin (BOBC), were synthesized and characterized. The photoluminescence and electroluminescence of the compounds were investigated detailedly. The compounds exhibited strong blue-green emissions in both solution and solid states, but the devices with DABOC as the emitting layer exhibited orange emission and maximum luminous efficiency of 2.8 cd/A and maximum luminance of 8,800 cd/m2, and the devices with BOBC displayed orange-white emission and maximum luminous efficiency of 0.13 cd/A and maximum luminance of 540 cd/m2.
合成并表征了两种含有电子传递
苯并恶唑基的
香豆素衍
生物,即 7-(
二乙基氨基)-3-(
苯并恶唑-2-基)
香豆素(
DABOC)和 3-(
苯并恶唑-2-基)苯并[5,6]
香豆素(BOBC)。对这些化合物的光致发光和电致发光进行了详细研究。这些化合物在溶液和固体状态下都表现出强烈的蓝绿色发射,但以
DABOC 为发射层的器件表现出橙色发射,最大发光效率为 2.8 cd/A 和最大亮度为 8,800 cd/m2 ;而以 BOBC 为发射层的器件则表现出橙白色发射,最大发光效率为 0.13 cd/A 和最大亮度为 540 cd/m2 。