Phenanthro[9,10-d]imidazole as a new building block for blue light emitting materials

• DOI: 10.1039/c1jm10321k
• Publication Date: 2011-03-01T18:43:00Z
• Authors: Zhiming Wang; Ping Lu; Shuming Chen; Zhao Gao; Fangzhong Shen; Wensi Zhang; Yuanxiang Xu; Hoi Sing Kwok; Yuguang Ma
• Keywords: 01 natural sciences; 0104 chemical sciences

The blue light emitting compound, BPPI, based on a phenanthro[9,10-d]imidazole group, is prepared by a facial synthetic process and exhibits excellent thermal stability, highly efficient fluorescence and balanced carrier injection. The double-layered device based on BPPI shows a higher maximum luminance and a lower turn-on voltage than the multi-layered one with an independent electron injection layer. The results suggest that the phenanthroimidazole unit is an excellent building block for tuning the carrier injection properties as well as blue emission.