Synthesis and utilization of perylene-based n-type small molecules in light-emitting electrochemical cells

Abstract

We report the synthesis of a soluble perylene-based small molecule for use as an n-type emissive material for organic optoelectronic device applications, and demonstrate the material in a light-emitting electrochemical cell configuration.

Efficient deep-red light-emitting electrochemical cells based on a perylenediimide-iridium-complex dyad

“…Single-layer LECs using PDI as n-type emissive material and lithium triflate have been recently reported showing red emission at high applied bias (+8 V). 7 A polyimide LEC incorporating perylene and tri(ethylene oxide) moieties has been also studied showing a much more intensified electroluminescence than the respective polyimide LED. 8 Taking into account the previous considerations, we decided to look for a synergistic collaboration between an ionic iridium(III) complex (that functions as the hole conductor and high phosphorescence emitter) and a PDI red fluorescent emitter (that functions as the electron conductor), in an attempt to achieve a high efficiency in the system.…”

Light-Emitting Electrochemical Cells: A Review on Recent Progress

“…It should, however, be acknowledged that a vast majority of the subsequent research on iTMC-LECs have employed an additional electrolyte (often an ionic liquid) in order to attain a reasonably fast turn-on time [4,5]. The LEC field has up until now been dominated by these two principal classes of compounds, although new groups of functional materials, in the form of non-ionic luminescent small molecules [6][7][8][9][10][11][12][13][14], ionic fluorescent small molecules [15][16][17], quantum dots [18,19], and perovskites [20,21], have emerged more recently. Figure 1c presents the chemical structures of a CP, an iTMC, and a luminescent small molecule, as well as a number of electrolytes that have been utilized in recent high-performance LEC devices.…”

Panchromatic engineering for dye-sensitized solar cells

“…18) 93 as ERD has been studied because PTCDI has an extremely high PL efficiency (>90%), fast fluorescence lifetime (4.8 ns, this value is three orders of magnitude faster than N877), excellent photoand air stability and a relatively strong absorption coefficient (50 000 M À1 cm À1 at 580 nm). 94 The R 0 ¼ 7.5-7.6 nm was determined by time-resolved PL measurements on solutions with varying concentration of TT1.…”