Novel epoxy-silicone thermolytic transparent packaging adhesives chemical modified by ZnO nanowires for HB LEDs
Source abstract
Abstract
A novel high transparent thermolytic epoxy-silicone for high-brightness light-emitting diode (HB-LED) is introduced, which was synthesized by polymerization using silicone matrix via diglycidyl ether bisphenol-A epoxy resin (DGEBA) as reinforcing agent, and filling ZnO nanowires to modify thermal conductivity and control refractive index of the hybrid material. The interactions of ZnO nanowires with polymers are mediated by the ligands attached to the nanoparticles. Thus, the ligands markedly influence the properties of ZnO nanowires/epoxy-silicone composites. The refractive indices of the prepared hybrid adhesives can be tuned by the ZnO nanowires from 1.4711 to 1.5605. Light transmittance can be increased by 20% from 80 to 95%. The thermal conductivity of the transparent packaging adhesives is 0.89–0.90 W/mK.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Synthesis and properties of polymers · Organic Light-Emitting Diodes Research · Advanced Sensor and Energy Harvesting Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (16)
Show source-provided references
1. Arik M, Setlur A, Weaver S, Haitko D, Petroski J (2007) Chip to system levels thermal needs and alternative thermal technologies for high brightness LEDS. J Electron Pack 129(3):328–33810.1115/1.2753958 ↗
2. Beecroft LL, Ober CK (1997) Nanocomposite materials for optical applications. Chem Mater 9(6):1302–131710.1021/cm960441a ↗
3. Böhm J, Hausselt J, Henzi P, Litfin K, Hanemann T (2004) Tuning the refractive index of polymers for polymer waveguides using nanoscaled ceramics or organic dyes. Adv Eng Mater 6(1–2):52–5710.1002/adem.200300542 ↗
4. Demir MM, Koynov K, Akbey U, Bubeck C, Park I, Lieberwirth I, Wegner G (2007) Optical properties of composites of PMMA and surface-modified zincite nanoparticles. Macromolecules 40(4):1089–110010.1021/ma062184t ↗
5. He Y, Sang WB, Wang JA, Wu R, Min J (2005a) Polymer-assisted complexing controlled orientation growth of ZnO nanorods. J Nanopart Res 7(2–3):307–31110.1007/s11051-005-1169-1 ↗
6. He Y, Sang WB, Wang JA, Wu R, Min J (2005b) Vertically well-aligned ZnO nanowires generated with self-assembling polymers. Mater Chem Phys 94(1):29–3310.1016/j.matchemphys.2005.03.063 ↗
7. He Y, Wang JA, Zhou LY, Zhang CC, Cao YS (2008) ZnO/silicone thermolytic transparent adhesive for HB LEDs. In: International materials research conference, Chongqing, China, Proceedings, 2008, p 96
8. Khrenov V, Klapper M, Koch M, Mullen K (2005) Surface functionalized ZnO particles designed for the use in transparent nanocomposites. Macromol Chem Phys 206(1):95–10110.1002/macp.200400213 ↗
9. Kyprianidou-leodidou T, Margraf P, Caseri W, Suter UW, Walther P (1997) Polymer sheets with a thin nanocomposite layer acting as a UV filter. Polym Adv Technol 8(8):505–51210.1002/(SICI)1099-1581(199708)8:8<505::AID-PAT678>3.0.CO;2-U ↗
10. Lee LH, Chen WC (2001) High refractive-index thin films prepared from trialkoxysilane-capped poly(methyl methacrylate)-titania materials. Chem Mater 13(3):1137–114210.1021/cm000937z ↗
11. Palkovits R, Althues H, Rumplecker A, Tesche B, Dreier A, Holle U, Fink G, Cheng CH, Shantz DF, Kaskel S (2005) Polymerization of w/o microemulsions for the preparation of transparent SiO2/PMMA nanocomposites. Langmuir 21(13):6048–605310.1021/la050630k ↗
12. Rector L, Starkey D (2004) Performance of epoxy encapsulants for optoelectronic packaging. In: 4th IEEE international conference on polymers and adhesives in microelectronics and photonics, Portland, pp 211–21510.1109/POLYTR.2004.1402763 ↗
13. Riegler B, Thomaier R, Bruner S (2006) Silicone system choices abound for HB LED packaging. Laser Focus World 42(11):115–118
14. Sim LC, Ramanana SR, Ismail H, Seetharamu KN, Goh TJ (2005) Thermal characterization of Al2O3 and ZnO reinforced silicone rubber as thermal pads for heat dissipation purposes. Thermochim Acta 430(1–2):155–16510.1016/j.tca.2004.12.024 ↗
15. Trevisanello L, Meneghini M, Mura G, Vanzi M, Pavesi M, Meneghesso G, Zanoni E (2008) Accelerated life test of high brightness light emitting diodes. IEEE Trans Device Mater Reliab 8(2):304–31110.1109/TDMR.2008.919596 ↗
16. Yamasaki T, Tsutsui T (1998) Spontaneous emission from fluorescent molecules embedded in photonic crystals consisting of polystyrene microspheres. Appl Phys Lett 72(16):1957–195910.1063/1.121234 ↗