Sky-blue electrogenerated chemiluminescence using anthracene derivatives as host and guest molecules

Abstract

We developed a solution-based sky-blue electrogenerated chemiluminescence (ECL) cell using two kinds of anthracene derivatives. 9,9’-10,10’-Tetraphenyl-2-2’-bianthracene (TPBA) was used as a guest molecule, while 2-tert-butyl-9,10-di(naphth-2-yl)anthracene (TBADN), which emits deep-blue fluorescence, was used as a host molecule. The microfluidic ECL cell with the TPBA-doped TBADN solution exhibited bright emission from TPBA with a maximum luminance of 7.7 cd m-2. By contrast, the ECL intensity was found to be considerably weak when the host was absent in the solution. We believe that the proposed host-guest solution will contribute to the future development of highly efficient ECL display devices.

Bright Yellow Electrogenerated Chemiluminescence Cell Using a Rubrene Solution Doped with an Emitting Assist Dopant

“…We used the same experimental apparatuses for measuring absorption (ABS) spectra and device performances as our previous works. 20…”

“…13 Although traditional ECL systems contain a single emitting species, more recently, ECL solutions containing multiple luminescent materials have been proposed. [14][15][16][17][18][19][20] In 2013, Nobeshima demonstrated an ACdriven white emission cell using yellow and blue fluorescent materials (rubrene and 9,10-diphenylanthracene). 14 Since 2014, we have been investigating host-guest ECL systems by referring to the literature on organic light-emitting diodes (OLEDs).…”

“…14 Since 2014, we have been investigating host-guest ECL systems by referring to the literature on organic light-emitting diodes (OLEDs). [15][16][17][18][19][20] Generally, OLEDs have a thin emitting layer containing host and guest materials, and carrier injection and transport layers are used to balance the number of electrons and holes in the emitting layer. Electroluminescence is obtained by energy transfer from the excited host molecules to the guests.…”

Yellow Phosphorescent Electrogenerated Chemiluminescence Cell Based on a Cyclometalated Iridium Complex with a Redox Mediator

“…19,20 In our previous work, we have proposed a novel ECL system using a redox mediator in order to balance the number of radical anions and cations in the solution. 21 In that work, a dis(styryl)benzene derivative, 4-(di-p-tolylamino)-4B-[(di-p-tolylamino)styryl]stilbene (DPAVB) was added to the rubrene solution as the mediator, and a microfluidic ECL cell, which was fabricated by microelectromechanical system (MEMS) processes, [22][23][24][25] exhibited an enhanced yellow emission derived from the excited rubrene molecules with the L max of 292 cd m ¹2 and a maximum current efficiency (CE max ) of 4.50 cd A ¹1 . We also reported that in comparison with rubrene, the neutral DPAVB molecule has a wide potential energy gap (E g ) and shallow lowest unoccupied and highest occupied molecular orbital (LUMO and HOMO) levels.…”

“…In this study, we propose a yellow phosphorescent ECL cell using the bis-cyclometalated iridium complex with an ancillary acac ligand and the mediator. The ECL performances of the prepared solutions were evaluated with our developed microfluidic cells, [23][24][25] and the electrochemical properties of the employed materials were analyzed by using the three-electrode configuration comprising of working, counter, and reference electrodes.…”