ARTÍCULO
TITULO

New Class of Wide Energy Gap Benzotriimidazole Optical Materials

Jianmin Shi    
J. Matthew Chudomel and Richard Fu    

Resumen

A new class of wide energy gap benzotriimidazole materials have been synthesized by a two-step condensation reaction. All of the benzotriimidazole compounds have p-p* absorption bands in the range of 250?400 nm. The photoluminescence (PL) quantum efficiency of each benzotriimidazole depends strongly on the presence of electron withdrawing groups. PL quantum efficiencies of benzotriimidazoles without electron withdrawing groups were less than desirable (40?43%), while molecules with electron withdrawing groups displayed much stronger PL with efficiencies in the range of 73?75%. The electron withdrawing groups shift the emission to a longer wavelength, towards a more ?true blue? color. This new class of benzotriimidazole optical materials could be used as electron-injecting and electron-transporting blue luminescence materials for potential organic light-emitting diode (OLED) applications.

 Artículos similares

       
 
K. Y. S. Putri,Zulhamri Bin Abdullah,Elisabeth Nugrahaeni,Rachmat Darmawan,Latifa Latifa     Pág. pp. 117 - 132
This study aims to identify learning management strategies on communication studies through Blended Learning in Higher Education. This study uses a quasi-experimental method with a non-equivalent control group research design. This design uses two groups... ver más

 
Valeriy Lakhno,Volodimir Malyukov,Nataliia Mazur,Lidiia Kuzmenko,Berik Akhmetov,Vitalii Hrebeniuk     Pág. 74 - 81
A model for managing the investment process has been proposed, using an example of investing in information technologies (IT) taking into consideration that a given process is multifactorial in character. The difference between our model and those constr... ver más

 
Gilberto Rodrigues Liska, Marcelo Ângelo Citillo, Fortunato Silva de Menezes, Júlio Silvio de Sousa Bueno Filho     Pág. e44068
A new approach to data analysis in mixture experiments is proposed using the simplex regression, that is in the class of dispersion models family. The advantages of this approach are illustrated in an experiment studying the mixture effect of fat, carboh... ver más

 
Imriyas Kamardeen; Marini Samaratunga    
Personalising learning is critical for universities to achieving excellence in education.  It entails maintaining an education system that is responsive to the learning needs, aptitudes and interests of individual students.  Rather than imposin... ver más

 
Ivan Nazarenko,Anatoly Svidersky,Alexandr Kostenyuk,Oleg Dedov,Nikolai Kyzminec,Volodymyr Slipetskyi     Pág. 43 - 49
A new scheme for the excitation of vibrations of the working bodies of the blocks of a vibration unit based on a change in the phase angles of unbalances between themselves is developed. The implementation of such an idea allows for one revolution of imb... ver más