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<p>Multifunction development of KNN-based ceramics is of great significance for the applications of optoelectronic devices. The CaSc<sub>0.5</sub>Nb<sub>0.5</sub>O<sub>3</sub> (CSN)-modified K<sub>0.5</sub>Na<sub>0.5</sub>NbO<sub>3</sub> (KNN) ceramics were used to investigate their photodielectric and photochromic properties. All the samples have a perovskite structure. As the CSN content is increased, a phase transition occurs from an orthorhombic phase to a pseudo-cubic phase, and the fine grains are further refined. The reversible photodielectric and photochromic response of KNN-based ceramics is enhanced by the CSN dopants. High dielectric tunability of 900% is obtained under 365&#xa0;nm light illumination, and a high reflectance change reflected the photochromic response is 48.49%. These results facilitate the development of new non-contact optoelectronic devices.</p>

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Enhanced photodielectric and photochromic characteristics of KNN-based ceramics doped with CaSc0.5Nb0.5O3

  • 期刊论文

  • 发表日期：

    2025年9月3日

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  • Sinian Chang,
  • Ling Yang,
  • Mao Ye,
  • Jiwen Xu

摘要

Multifunction development of KNN-based ceramics is of great significance for the applications of optoelectronic devices. The CaSc0.5Nb0.5O3 (CSN)-modified K0.5Na0.5NbO3 (KNN) ceramics were used to investigate their photodielectric and photochromic properties. All the samples have a perovskite structure. As the CSN content is increased, a phase transition occurs from an orthorhombic phase to a pseudo-cubic phase, and the fine grains are further refined. The reversible photodielectric and photochromic response of KNN-based ceramics is enhanced by the CSN dopants. High dielectric tunability of 900% is obtained under 365 nm light illumination, and a high reflectance change reflected the photochromic response is 48.49%. These results facilitate the development of new non-contact optoelectronic devices.