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Adranno B, Paterlini V, Smetana V, Bousrez G, Ovchinnikov A, Mudring AV. Enhanced stability and complex phase behaviour of organic-inorganic green-emitting ionic manganese halides. Dalton Trans 2023; 52:6515-6526. [PMID: 37186240 DOI: 10.1039/d2dt03817j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Light-emitting materials based on earth-abundant metals, such as manganese hold great promise as emitters for organic lighting devices. In order to apply such emitter materials and, in particular, to overcome the problem of self-quenching due to cross-relaxation, we investigated a series of tetrabromidomanganate ([MnBr4]2-) salts with bulky tetraalkylphosphonium counter cations [Pnnn]+, namely [Pnnnn]2[MnBr4] (n = 4 (1), 6 (2) and 8 (3)), which can be obtained by a straightforward reaction of the respective phosphonium bromide and MnBr2. Variation of the cation size allows control of the properties of the resulting ionic materials. 1 and 3 qualify as ionic liquids (ILs), where 1 features a melting point of 68 °C, and 3 is liquid at room temperature and even at very low temperatures. Furthermore, 1 and 2 show the formation of higher-ordered thermotropic mesophases. For 1 a transition to a thermodynamically metastable smectic liquid crystalline phase can be observed at room temperature upon reheating from the metastable glassy state; 2 appears to form a plastic crystalline phase at ∼63 °C, which persists up to the melting point of 235 °C. The photoemission is greatly affected by phase behaviour and ion dynamics. A photoluminescence quantum yield of 61% could be achieved, by balancing the increase in Mn2+-Mn2+ separation and reducing self-quenching through increasingly large organic cations which leads to adverse increased vibrational quenching. Compared to analogous ammonium compounds, which have been promoted as ̈inorganic hybrid perovskites̈, the phosphonium salts show superior performance, with respect to photoluminescent quantum yield and thermal and air/humidity stability. As the presented compounds are not sensitive to the atmosphere, in particular moisture, and show strong visible electroluminescence in the green region of light, they are important emitter materials for use in organic light-emitting devices.
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Affiliation(s)
- Brando Adranno
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, SE-10691 Stockholm, Sweden.
| | - Veronica Paterlini
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, SE-10691 Stockholm, Sweden.
| | - Volodymyr Smetana
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, SE-10691 Stockholm, Sweden.
- Intelligent Advanced Materials, Department of Biological & Chemical Engineering and iNANO, Aarhus University, 8000 Aarhus C, Denmark
| | - Guillaume Bousrez
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, SE-10691 Stockholm, Sweden.
- Intelligent Advanced Materials, Department of Biological & Chemical Engineering and iNANO, Aarhus University, 8000 Aarhus C, Denmark
| | - Alexander Ovchinnikov
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, SE-10691 Stockholm, Sweden.
| | - Anja-Verena Mudring
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, SE-10691 Stockholm, Sweden.
- Intelligent Advanced Materials, Department of Biological & Chemical Engineering and iNANO, Aarhus University, 8000 Aarhus C, Denmark
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Huang Z, Fu Z, Xu J, Peng F, Guo T, Ying L. Efficient deep‐blue light‐emitting polyfluorenes based on 9,9
‐dimethyl‐9
H
‐thioxanthene 10,10‐dioxide isomers. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Zhiqi Huang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China
| | - Zhaoxi Fu
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China
| | - Jin Xu
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China
| | - Feng Peng
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China
- South China Institute of Collaborative Innovation Dongguan 523808 China
| | - Ting Guo
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China
| | - Lei Ying
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China
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Hu L, Liao G, Guo T, Gao H, Ying L, Cao Y. Wide bandgap poly(meta-styrene) derivatives containing pendant carbazolyl groups as hosts for efficient solution-processed organic light emitting diodes. Polym Chem 2019. [DOI: 10.1039/c9py00923j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Two novel wide bandgap poly(meta-styrene) derivatives as hosts for solution-processed organic light emitting diodes were synthesized via free-radical polymerization.
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Affiliation(s)
- Liwen Hu
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Guangfu Liao
- School of Materials Science and Engineering
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Ting Guo
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Haiyang Gao
- School of Materials Science and Engineering
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Lei Ying
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Yong Cao
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
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Chen Y, Lu Q, Gao L, Zhang X, Yang C, Cai W, Pang G, Niu H, Wang W, Hou Y, Zhang Y. Synthesis and optoelectronic properties of novel alternate copolymers based on diketopyrrolopyrrole and triarylamine units spaced by flexible chain. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.10.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Bipolar Blue Light-emitting Polyfluorenes Containing Dibenzothiophene-S,S-dioxide/Carbazole Units. Chem Res Chin Univ 2018. [DOI: 10.1007/s40242-018-7311-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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