Highly Efficient Heavy Atom Free Room Temperature Phosphorescence by Host-Guest Doping

Abstract

Recently, there has been remarkable progress of the host-guest doped pure organic room-temperature phosphorescence (RTP) materials. However, it remains a great challenge to develop highly efficient host-guest doping systems. In this study, we have successfully developed a heavy atom free pure organic molecular doped system (benzophenone-thianthrene, respectively) with efficient RTP through a simple host-guest doping strategy. Furthermore, by optimizing the doping ratios, the host-guest material with a molar ratio of 100:1 presented an efficient RTP emission with 46% quantum efficiency and a long lifetime of up to 9.17 ms under ambient conditions. This work will provide an effective way to design new organic doping systems with RTP.

Near‐Infrared Room‐Temperature Phosphorescence in Arylselanyl BODIPY‐Doped Materials

“…The resultant powder was subjected to photophysical measurements. As shown in Figure 5a‐1, BP showed typical emission bands at 419, 447, and 480 nm, as well as a shoulder peak ascribable to phosphorescence at 522 nm when excited at 350 nm [27] . Doping HSeBOD into BP caused new emission bands in the NIR region at 750 nm and the visible region ranging from 525–680 nm.…”

“…As shown in Figure 5a-1, BP showed typical emission bands at 419, 447, and 480 nm, as well as a shoulder peak ascribable to phosphorescence at 522 nm when excited at 350 nm. [27] Doping HSeBOD into BP caused new emission bands in the NIR region at 750 nm and the visible region ranging from 525-680 nm. With increasing molar ratio of HSeBOD, the emission intensity of the NIR band increased…”

Recent progress with the application of organic room-temperature phosphorescent materials

“…[22][23][24][25][26] Host-guest doping of small molecules realizes efficient RTP emission with effective energy transfer by modulating energy levels between them. [27][28][29][30] Based on these strategies, the constructed RTP materials are endowed with various luminescent properties in different physical conditions, which makes them exhibit tremendous application value in various fields including light-emitting diodes, anti-counterfeiting, sensors, and bioimaging. In this review, we summarize the recent progress with the application of organic RTP materials constructed by the above strategies.…”

Encapsulation engineering of porous crystalline frameworks for delayed luminescence and circularly polarized luminescence

“…28 To date, various types of host materials have been developed for delayed luminescence, such as conjugated polymers, supramolecular assemblies and liquid crystalline materials. [28][29][30][31][32] However, the preparation of these amorphous materials is sometimes unpredictable, and thus they cannot provide clear molecularscale structures showing the arrangement of host-guest systems. 33 In the case of generating CPL, many CPL-active materials have been developed.…”