53455-06-4

Upstream product

• 2362-50-7 thianthrene-5-oxide 
• 92-85-3 Thianthrene 
• 139-66-2 diphenyl sulfide 
• 1313390-83-8 dimethylbis(thianthren-1-yl)tin 
• 7726-95-6 bromine 
• 64-19-7 acetic acid 
• 10035-10-6 hydrogen bromide 

Downstream Products

• 92-85-3 Thianthrene 
• 36140-35-9 diphenylboron fluoride 
• 5123-17-1 bromodiphenylborane 

Relevant academic research and scientific papers

Purely Organic Crystals Exhibit Bright Thermally Activated Delayed Fluorescence

Thermally activated delayed fluorescent (TADF) materials generally suffer from severe concentration quenching. Efficient non-doped TADF emitters are generally highly twisted aromatic amine-based compounds with isolated chemical moieties. Herein we demonst

A comparative study of carbazole-based thermally activated delayed fluorescence emitters with different steric hindrance

Thermally activated delayed fluorescence (TADF) emitters based on carbazole groups have been reported to realize different efficiencies in devices. Herein, we report two carbazole-based TADF emitters, namely 2-(9H-carbazol-9-yl)thianthrene 5,5,10,10-tetraoxide (CZ-TTR), which has one free-rotation carbazole, and 2,3-di(9H-carbazol-9-yl)thianthrene 5,5,10,10-tetraoxide (DCZ-TTR), which has two mutually restricted carbazole groups, and investigated the influence of steric hindrance on their properties. Both compounds employed the same donor and acceptor segments and connecting mode. However, due to steric hindrance between the two carbazole segments, DCZ-TTR exhibited a smaller singlet-triplet splitting of 0.03 eV compared with that of CZ-TTR (0.10 eV). The device containing DCZ-TTR showed significantly higher efficiencies (20.1% for external quantum efficiency (EQE), 58.5 lm W-1 for power efficiency (PE), and 59.6 cd A-1 for current efficiency (CE)) than those of the CZ-TTR-based device (EQE = 14.4%; PE = 32.9 lm W-1; CE = 32.5 cd A-1). These results clearly proved the necessity of introducing suitable steric hindrance when designing highly efficient TADF emitters based on carbazole groups.

Novel aggregation-induced emission and thermally activated delayed fluorescence materials based on thianthrene-9,9′,10,10′-tetraoxide derivatives

Two novel luminescent molecules based on thianthrene-9,9′,10,10′-tetraoxide derivatives, named tCzDSO2 and 3tCzDSO2, have been synthesized and characterized. The compound tCzDSO2 emits intense aggregation-induced emission (AIE) with a high photoluminescence quantum yields (ΦF) of 0.92 at room temperature in the solid state. Simultaneously, by increasing the proportion of carbazole units, 3tCzDSO2 exhibits both AIE and thermally activated delayed fluorescence (TADF) in the solid state with ΦF of 0.19 in air and 0.41 in N2 atmosphere. The two compounds also display a bathochromic effect due to their intramolecular charge transfer (ICT) attribute. The time-dependent DFT predicted the singlet and triplet splitting (ΔEST) values of tCzDSO2 and 3tCzDSO2 to be 0.29 eV and 0.06 eV, respectively. The ΔEST of 3tCzDSO2 is small enough to allow efficient reverse intersystem crossing (RISC), leading to the TADF property at room temperature. As a result, the molecular design provides a simple and effective approach to integrate the features of AIE and TADF into one compound.

Compound, organic light emitting display panel, and display device

The invention belongs to the technical field of OLED and provides a compound with a D-[sigma]-A chemical structure. The compound has a structure as shown in a chemical formula 1; herein, D is an electron donating group, and m is selected from 1, 2 and 3; wherein A is an electron acceptor group, and n is selected from 1, 2 and 3; d is mainly selected from substituted or unsubstituted C12-C40 carbazole groups, substituted or unsubstituted C13-C40 acridine groups and substituted or unsubstituted C12-C40 diphenylamine groups; wherein A is selected from any one of an aryl boron substituent group, abenzophenone substituent group, an aromatic heterocyclic ketone substituent group and a sulfone substituent group. An electron-donating group and an electron-accepting group are connected to a tetraphenyl silicon mother nucleus to form non-conjugated connection, so that the compound has a D-[sigma]-A molecular structure. Particularly, the introduction of the electron acceptor group A enables thewhole compound molecule to have bipolar property, which is beneficial to the transmission of electron and hole carriers.

Towards high performance solution-processed orange organic light-emitting devices: Precisely-adjusting properties of Ir(III) complexes by reasonably engineering the asymmetric configuration with second functionalized cyclometalating ligands

The property-tuning of phosphorescent organometallic Ir(iii) complexes is a crucial issue in developing high performance electroluminescent materials. Unlike the conventional strategy that usually regulates the properties of symmetric tri-/bis-cyclometalated Ir(iii) complexes by modifying the structure of the cyclometalating ligands, we herein report the method of tuning properties by reasonably engineering the asymmetric configuration of Ir(iii) complexes. Taking the newly synthesized conventional symmetric bis-cyclometalated Ir(iii) complex SIrS as a reference, the emission properties such as the emission color, radiative lifetime (τr), and the photoluminescence quantum yield (PLQY) as well as charge transport properties can be tuned step by step by reasonably choosing the second functionalized cyclometalating ligand. The photophysical measurements and theoretical calculations reveal that the adjustment of emission properties results from the switches of the low energy charge transfer characteristics. Accordingly, the optimized asymmetric complex SIrB displays the highly desirable orange emission with a high PLQY of 0.96, a short τr of 0.38 μs, and significantly enhanced electron injection/transport abilities. More importantly, the solution-processed orange organic light-emitting device (OLED) based on SIrB exhibits excellent electroluminescence (EL) performance with a maximum external quantum efficiency (EQE), current efficiency (CE), and power efficiency (PE) of 23.2percent, 66.5 cd A-1, and 56.0 lm W-1, respectively, which are among the best reported for state-of-the-art solution-processed orange OLEDs. This study demonstrates the importance of the asymmetric configuration engineering strategy for developing phosphorescent Ir(iii) complexes with outstanding EL performance.

Non-aromatic amine small molecule photoelectric material and preparation and application thereof

The invention belongs to the field of photoelectric materials, and discloses a non-aromatic amine small molecule photoelectric material and preparation and application thereof. The non-aromatic aminesmall molecule photovoltaic material has a structural formula as shown in the formula (I). In the formula, R1 is selected from H or -CH3; and R1, R2, R3, and R4 are independently selected from S or O.The non-aromatic amine small molecule photoelectric material of the invention has good hole transport ability, can be applied to a hole transport layer of an organic photoelectric device, and can also be combined with a common electron transport type material to generate an exciplex for luminescence, exhibits high fluorescence quantum yield and exhibits the property of thermally activated delayedfluorescence.

Achieving high-efficiency purely organic room-temperature phosphorescence materials by boronic ester substitution of phenoxathiine

The effect of boronic ester substitution on the room-temperature phosphorescence properties of phenoxathiine-based derivatives was thoroughly investigated. A significantly improved phosphorescence quantum efficiency of up to 20% in the crystalline state was achieved by delicate molecular manipulation for both enhanced spin-orbital coupling and compact intermolecular packing.

Compound, light-emitting material, device and display device

The invention relates to the technical field of organic electroluminescent materials and particularly relates to a compound, a light-emitting material, a device and a display device. The compound hasa structure expressed by a formula which is as shown in the description. The compound can be used as a thermally activated delayed fluorescent (TADF) material. When the compound is used as a light-emitting material or a main body material of a light-emitting layer of an organic light-emitting device, the compound can achieve high light-emitting efficiency.

Compound and organic luminescence display device

The invention relates to the technical field of organic electroluminescent materials, in particular to a compound and an organic luminescence display device. The compound has a structure shown by formula (I) in the description, wherein D represents an electron donor unit; A represents an electron receiver unit; m and n are respectively and independently selected from 1, 2 or 3; in addition, the sum of the m and the n is smaller than or equal to 4. When the compound is used as a luminous material, an object material or a main body material of the organic luminescence display device, high luminescence efficiency can be realized.

Aromatic heterocyclic compound and organic light-emitting display device

The invention relates to an aromatic heterocyclic compound having a thermal active delay fluorescence (TADF) property, having a structure represented by a formula (I), wherein X1 and X2 are selected from S or O respectively; D represents a chemical group as an electron donor, and A represents a chemical group as an electron acceptor; m represents the number of electron donors D linked to the formula (I), and the electron donors D are the same or different; n represents the number of the electron acceptors linked to the formula (I), and the electron acceptors A are the same or different; m andn are 1 or 2 independently. The luminescence mechanism of the aromatic heterocyclic compound disclosed by the invention is thermal active delay fluorescence, and therefore high luminescence efficiencyis achieved. When the compound is used as a luminescent material, a luminescent host material or an object material in an organic light-emitting display device, the luminescent efficiency of the organic light-emitting display device can be improved, and the advantages of lower cost and longer service life are achieved.