One-step vapor-phase synthesis of transparent high refractive index sulfur-containing polymers
| Autor: | Kookheon Char, Jeewoo Lim, Keonwoo Choi, Sung Gap Im, Ji Sung Choi, Do Heung Kim, Jeffrey Pyun, Wontae Jang |
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| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
Materials science Materials Science chemistry.chemical_element 02 engineering and technology Chemical vapor deposition 010402 general chemistry 01 natural sciences chemistry.chemical_compound Deposition (phase transition) Thin film Research Articles Polysulfide chemistry.chemical_classification Multidisciplinary business.industry High-refractive-index polymer technology industry and agriculture food and beverages SciAdv r-articles Polymer 021001 nanoscience & nanotechnology Sulfur 0104 chemical sciences chemistry Optoelectronics 0210 nano-technology business Refractive index Research Article |
| Zdroj: | Science Advances |
| ISSN: | 2375-2548 |
| Popis: | Colorless, transparent polymer thin films with n > 1.9 were prepared through vapor deposition polymerization of elemental sulfur. High refractive index polymers (HRIPs) have recently emerged as an important class of materials for use in a variety of optoelectronic devices including image sensors, lithography, and light-emitting diodes. However, achieving polymers having refractive index exceeding 1.8 while maintaining full transparency in the visible range still remains formidably challenging. Here, we present a unique one-step vapor-phase process, termed sulfur chemical vapor deposition, to generate highly stable, ultrahigh refractive index (n > 1.9) polymers directly from elemental sulfur. The deposition process involved vapor-phase radical polymerization between elemental sulfur and vinyl monomers to provide polymer films with controlled thickness and sulfur content, along with the refractive index as high as 1.91. Notably, the HRIP thin film showed unprecedented optical transparency throughout the visible range, attributed to the absence of long polysulfide segments within the polymer, which will serve as a key component in a wide range of optical devices. |
| Databáze: | OpenAIRE |
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