Lead-free halide double perovskite has received widespread attention due to its excellent optical performance. However, the lack of deep red light and poor heat quenching resistance severely limit its application in plant lighting field. In this work, Ho3+ was introduced into the thermally stable Cs2NaScCl6 host, exhibiting a deep red emission of 660 nm. By constructing an energy transfer channel between Sb3+ and Ho3+, the photoluminescence quantum yield (PLQY) of Cs2NaScCl6:1%Sb3+,40%Ho3+ rises up to 53.8%, that is increased by 17 times, and its emission intensity can still be maintained by 80% at 423 K, exhibiting good heat quenching resistance. The obtained Cs2NaScCl6:1%Sb3+,40%Ho3+ and Cs2NaScCl6:1%Sb3+ with blue light emission were employed for fabricating a light-emitting diode (LED) device with a 340 nm UV chip, and its emission spectrum matches well the absorption spectra of chlorophyll A and chlorophyll B with the high resemblance of 70% and 75%, making it suitable for use as an artificial light source to control the growth process of plants in the field of plant lighting.

中文翻译：

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高热稳定性深红光 Sb3+，Ho3+ 共掺杂 Cs2NaScCl6 双钙钛矿用于植物照明


无铅卤化物双钙钛矿因其优异的光学性能而受到广泛关注。然而，缺乏深红光和较差的耐热淬火性严重限制了其在植物照明领域的应用。在这项工作中，Ho3+ 被引入热稳定的 Cs2NaScCl6 宿主中，表现出 660 nm 的深红色发射。通过在 Sb3+ 和 Ho3+ 之间构建能量传递通道，Cs2NaScCl6：1%Sb3+，40%Ho3+ 的光致发光量子产率 （PLQY） 上升到 53.8%，提高了 17 倍，其发射强度在 423 K 时仍能保持 80%，表现出良好的抗热淬性能。将所得的具有蓝光发射的Cs2NaScCl6：1%Sb3+、40%Ho3+和Cs2NaScCl6：1%Sb3+用于制备具有340 nm紫外芯片的发光二极管（LED）器件，其发射光谱与叶绿素A和叶绿素B的吸收光谱匹配良好，相似度为70%和75%，适合作为人工光源，控制植物领域的植物生长过程照明。