UV-curable ladder-like diphenylsiloxane-bridged methacryl-phenyl-siloxane for high power LED encapsulation

Shang, Xinxin; Duan, Suqing; Zhang, M.; Cao, Xinyu; Zheng, Kang; Zhang, J. N.; M., Y.; Zhang, R. B.

doi:10.1039/c8ra00063h

Cited by 16 publications

(19 citation statements)

References 51 publications

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“…Recently, Hwang et al reported the synthesis of various functional ladder-like structured polysilsesquioxanes (LPSQs) synthesized by the sol–gel reaction with a solvent over ten days and compared the thermal and mechanical properties of the LPSQs with POSS, which have carbazole and phenyl groups [21,22,23]. Hwang et al also reported a hybrid ionogel electrolytes using methacrylate LPSQs for lithium ion batteries, and Zhang et al applied the methacrylate-phenyl LPSQs into LED encapsulation [16,24,25]. Despite of the high potency of LPSQs as optical and electrical application, their application area is still limited and the complicate and time-consuming synthetic process are issues.…”

Section: Introductionmentioning

confidence: 99%

High-Performance and Simply-Synthesized Ladder-Like Structured Methacrylate Siloxane Hybrid Material for Flexible Hard Coating

et al. 2018

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A high performance ladder-like structured methacrylate siloxane hybrid material (LMSH) was fabricated via simple hydrolytic sol–gel reaction, followed by free-radical polymerization. A structurally ordered siloxane backbone, the ladder-like structure, which is an essential factor for high performance, could be achieved by a short period of sol–gel reaction in only 4 h. This results in superior optical (Transmittance > 90% at 550 nm), thermal (T5 wt % decomposition > 400 ℃), mechanical properties(elastic recovery = 0.86, hardness = 0.6 GPa) compared to the random- and even commercialized cage-structured silsesquioxane, which also has ordered structure. It was investigated that the fabricated ladder-like structured MSH showed the highest overall density of organic/inorganic co-networks that are originated from highly ordered siloxane network, along with high conversion rate of polymerizable methacrylate groups. Our findings suggest a potential of the ladder-like structured MSH as a powerful alternative for the methacrylate polysilsesquioxane, which can be applied to thermally stable and flexible optical coatings, even with an easier and simpler preparation process.

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Section: Introductionmentioning

confidence: 99%

High-Performance and Simply-Synthesized Ladder-Like Structured Methacrylate Siloxane Hybrid Material for Flexible Hard Coating

et al. 2018

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“…However, a large difference in the onset temperature of weight loss was not observed. The results indicate that factors that reduce thermal properties of our hybrid materials are due to monomers and unreacted functional groups of PSQ-SH and the hydroxy group (-OH group) at the PSQ-SH terminal (Shang et al, 2018).…”

Section: Thermogravimetry-differential Thermal Analyzer (Tg-dta) Analmentioning

confidence: 95%

Evaluation of Sealing Properties to LED Light Emitting Substrate of Organic-inorganic Hybrid Materials Composed of Polysilsesquioxane with Thiol Group

Hamasuna

Takao²,

Ota³

et al. 2021

MATEC Web Conf.

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Novel organic-inorganic hybrid materials were developed as LED sealants. Polysilsesquioxane with an -SH group (PSQ-SH) and acrylic monomer were selected as the inorganic and organic components, respectively. Trimethylolpropane trimethacrylate (TRIM), which is a trifunctional monomer, was selected as an acrylic monomer, and curing of the material was performed by the thiol-ene reaction. The LED was sealed using the prepared PSQ-SH/TRIM hybrid material (PTH), and a light emission test was performed. However, cracks occurred in the hybrid material during lighting. Therefore, ditrimethylol propane tetraacrylate (DTMPTA), which is a tetrafunctional monomer, was selected for the first time to prepare a PSQ-SH/DTMPA hybrid material (PDH) in order to enhance the strength and heat resistance of the material. The characteristics of the novel PDH were evaluated and compared with those of PTH. Specifically, the heat resistance was evaluated by confirming the onset temperature of weight reduction using thermogravimetry-differential thermal analyzer (TG-DTA) analysis, and the mechanical strength was also evaluated by bonding the glass substrates with a hybrid material and measuring the sealing strength. In conclusion, it was possible to suppress crack generation during lighting by using PDH instead of PTH in the light emission test.

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“…However, with the highest phenyl substitution, the siloxanes may still subject to a RI ceiling of $1.6. [19][20][21][22] The other way to increase the RI of siloxane is by introducing inorganic nanoparticles with high RI, such as ZrO 2 , TiO 2 , and ZnO into the matrix. The RI of the composite can be varied in a wide range according to the method of preparation and nanoparticle content.…”

Section: Introductionmentioning

confidence: 99%

Zirconia/phenylsiloxane nano-composite for LED encapsulation with high and stable light extraction efficiency

et al. 2021

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UV-curable ladder-like diphenylsiloxane-bridged methacryl-phenyl-siloxane for high power LED encapsulation

Abstract: UV-curable ladder-like polysiloxane was constructed to integrate high RI (1.61/450 nm) with high thermal stability etc. for high power LED encapsulation.

Cited by 16 publications

References 51 publications

High-Performance and Simply-Synthesized Ladder-Like Structured Methacrylate Siloxane Hybrid Material for Flexible Hard Coating

High-Performance and Simply-Synthesized Ladder-Like Structured Methacrylate Siloxane Hybrid Material for Flexible Hard Coating

Evaluation of Sealing Properties to LED Light Emitting Substrate of Organic-inorganic Hybrid Materials Composed of Polysilsesquioxane with Thiol Group

Zirconia/phenylsiloxane nano-composite for LED encapsulation with high and stable light extraction efficiency

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