کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1267532 | 972358 | 2012 | 7 صفحه PDF | دانلود رایگان |

The molecular design strategies for the host materials suitable for highly efficient, blue fluorescent organic light-emitting diodes (OLEDs) are demonstrated. The device characteristics of blue fluorescent OLEDs are compared with different host materials. Some devices exhibit a highly efficient blue electroluminescence with a high external quantum efficiency of more than 7%. The correlation between OLED efficiency and triplet–triplet annihilation is characterized by measuring the up-conversion of triplet excited states into singlet ones. The host materials require an anthracene unit and a bulky molecular structure to prevent the overlap of anthracene units between adjacent molecules in the film.
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► Molecular design strategies for the host materials suitable for efficient, blue fluorescent OLEDs.
► External quantum efficiency of over 7% in blue fluorescent OLEDs.
► Effect of excimer formation of host material on the efficiency of OLEDs.
Journal: Organic Electronics - Volume 13, Issue 7, July 2012, Pages 1197–1203