Scholarlink

<p>Eu<sup>3+</sup>-activated red phosphors are popular for their classic <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub><i>J</i></sub> (<i>J</i> = 0, 1, 2, 3, 4) emission characteristics. However, the weak emission of the <sup>5</sup>D<sub>0</sub> →<sup>7</sup>F<sub>4</sub> transition and the concentration quenching caused by energy migration have become the main obstacles to achieving strong far-red emission. Herein, we report a novel Ba<sub>3</sub>Sc<sub>1-<i>x</i></sub>(BO<sub>2</sub>)<sub>9</sub>: <i>x</i>Eu<sup>3+</sup> phosphor that simultaneously enhances <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>4</sub> emission and suppresses quenching through size confinement and low phonon energy. A Sr<sup>2+</sup> → Ba<sup>2+</sup> substitution strategy optimizes luminescence, achieving 1.56-fold intensity enhancement and improved quantum efficiency (IQE: 83% → 92%; EQE: 38% → 40%). The improvement mechanism was revealed through the local coordination distortion of Eu<sup>3+</sup> and the change of the band gap when Sr and Ba coexist. Structural analysis reveals enhanced thermal stability (423&#xa0;K: 86% → 97%; 483&#xa0;K: 78% → 95%) originates from increased lattice rigidity. Abnormal thermal quenching (303–363&#xa0;K) is white light-emitting diodes (WLEDs) device prepared based on Ba<sub>2.80</sub>Sr<sub>0.20</sub>Eu(BO<sub>2</sub>)<sub>9</sub> phosphor shows a color temperature of 4532&#xa0;K and a color rendering index of 91.6. This article also explores three applications of plant growth, latent fingerprint visualization, and anti- counterfeiting QR code. This finding provides a reference for further exploring the design of high concentration quenching and efficient far-red emitting phosphors.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The synergy of structural constraints and lattice engineering endows Ba2.80Sr0.20Sc(BO2)9: Eu3+ phosphor with a concentration-free quenching effect and far-red emission

  • 期刊论文

  • 发表日期：

    2025年8月11日

查看全文
  • Xiao-Qing Pei,
  • Li-Na Liu,
  • Chun Li,
  • Hai Lin,
  • Sha-Sha Li,
  • Wei-Ling Yang,
  • Fan-Ming Zeng

摘要

Eu3+-activated red phosphors are popular for their classic 5D0 → 7FJ (J = 0, 1, 2, 3, 4) emission characteristics. However, the weak emission of the 5D0 →7F4 transition and the concentration quenching caused by energy migration have become the main obstacles to achieving strong far-red emission. Herein, we report a novel Ba3Sc1-x(BO2)9: xEu3+ phosphor that simultaneously enhances 5D0 → 7F4 emission and suppresses quenching through size confinement and low phonon energy. A Sr2+ → Ba2+ substitution strategy optimizes luminescence, achieving 1.56-fold intensity enhancement and improved quantum efficiency (IQE: 83% → 92%; EQE: 38% → 40%). The improvement mechanism was revealed through the local coordination distortion of Eu3+ and the change of the band gap when Sr and Ba coexist. Structural analysis reveals enhanced thermal stability (423 K: 86% → 97%; 483 K: 78% → 95%) originates from increased lattice rigidity. Abnormal thermal quenching (303–363 K) is white light-emitting diodes (WLEDs) device prepared based on Ba2.80Sr0.20Eu(BO2)9 phosphor shows a color temperature of 4532 K and a color rendering index of 91.6. This article also explores three applications of plant growth, latent fingerprint visualization, and anti- counterfeiting QR code. This finding provides a reference for further exploring the design of high concentration quenching and efficient far-red emitting phosphors.

Graphical Abstract