Cyclometalated Platinum(II) β‐Diketonate Complexes with Extremely High External Quantum Efficiency for White Organic Light‐Emitting Diodes

Abstract

Figure 5. Emission spectra of 1-3 at 77 K in frozen CH 2 Cl 2 glass.

Encapsulation of AIEgens within Metal–Organic Framework toward High‐Performance White Light‐Emitting Diodes

“…[5] Another approach, which directly utilizes single-phase white light emitting (WLE) materials excited by ultraviolet light, can overcome the above weaknesses and achieve reproducible and color-stable WLEDs (Approach II in Scheme 1). [6] So far, a series of white-light-coated materials such as small organic molecules, [7][8][9][10] rare earth metals, [11][12][13] carbon dots, [14,15] quantum dots, [16,17] and metal complexes, [11,18,19] have been developed. Among them, organic dyes whose luminescence properties are easier to be adjusted have attracted tremendous attention.…”

Low Efficiency Roll‐Off Blue Phosphorescent OLEDs at High Brightness Based on [3+2+1] Coordinated Iridium (III) Complexes

“…[41,42] Furthermore, the emission behavior of these complexes doped in poly(methyl methacrylate) (PMMA) thin films has also been investigated. As shown in Figure 4c, these complexes generally showed a blue shift when compared to their corresponding emission spectra in the DCM solution and exhibited high PLQYs of up to 90% with short excited state lifetime ranging from 2-5 µs in solid-state thin films, indicating a high k r of 3 × 10 5 s −1 (Table 2), highly comparable to the state-of-the-art iridium(III), [7,27,[43][44][45][46] platinum(II), [47][48][49][50][51][52][53][54] and gold(III) [23,[55][56][57][58] phosphorescent emitters.…”

Spodium bonding to anticrown-Hg3boosts phosphorescence of cyclometalated-PtIIcomplexes

“…57 and 58, can be assigned to excimer emission. The incorporation of bulky substitutes in the diketonate moiety of 3 and 5 suppresses the formation of the excimer, [59][60][61] as follows from the absence of luminescence band in the red region. Interestingly, we did not observe any excimer emission in the cocrystals.…”