An ultra-high external quantum efficiency (EQE ≈ 49.4%) is achieved by substituting Ta ⁵⁺ with Nb ⁵⁺ in GaTa _{1− y} Nb _y O ₄ :Cr ³⁺ phosphor.

A new dual-switch, wide temperature range and high-sensitivity temperature sensing material La₂Mo₃O₁₂:Yb³⁺,Pr³⁺ has been successfully designed and developed based on intervalence charge transfer and up-conversion strategies.

A low-profile antenna with a high gain and broad bandwidth is proposed for Sub-6GHz communication in this paper. A narrow-band patch mode and a narrow-band dipole mode are shared in one radiator and simultaneously excited to broaden the bandwidth. A compact prototype with a projection size of 0.90 λ₀ × 0.78 λ₀ and a profile of 0.13 λ₀ (λ₀ is the wavelength in the free space at the center of the operating frequency) is fabricated and measured. The measurement demonstrates an impedance bandwidth of 67.50%, covering the frequency range from 2.75 GHz to 5.45 GHz and an average gain of 8.4 dBi in the operating band of 3.0–5.0 GHz.