High-Refractive-Index Cross-Linked Cyclic Olefin Polymers with Excellent Transparency via Thiol–Ene Click Reaction

High-refractive-index polymers are important optical materials in optoelectronics. Conventional cyclic olefin polymers (COPs), possessing many excellent optical properties, are a class of highly promising optical materials; however, one of the greatest obstacles is their low refractive index of