Lead-free halide perovskite materials possess low toxicity, broadband luminescence and robust stability compared with conventional lead-based perovskites, thus holding great promise for eyes-friendly white light LEDs. However, the traditionally used preparation methods with a long period and limited product yield have curtailed the commercialization of these materials. Here we introduce a universal hydrochloric acid-assistant powder-to-powder strategy which can accomplish the goals of thermal-, pressure-free, eco-friendliness, short time, low cost and high product yield, simultaneously. The obtained Cs₂Na_0.9Ag_0.1In_0.95Bi_0.05Cl₆ microcrystals exhibit bright self-trapped excitons emission with quantum yield of (98.3 ± 3.8)%, which could retain (90.5 ± 1.3)% and (96.8 ± 0.8)% after continuous heating or ultraviolet-irradiation for 1000 h, respectively. The phosphor converted-LED exhibited near-unity conversion efficiency from ultraviolet chip to self-trapped excitons emission at ~200 mA. Various ions doping (such as Cs₂Na_0.9Ag_0.1InCl₆:Ln³⁺) and other derived lead-free perovskite materials (such as Cs₂ZrCl₆ and Cs₄MnBi₂Cl₁₂) with high luminous performance are all realized by our proposed strategy, which has shown excellent availability towards commercialization.

与传统的铅基钙钛矿相比，无铅卤化物钙钛矿材料具有低毒性、宽带发光和强大的稳定性，因此为护眼白光LED带来了巨大的前景。然而，传统的制备方法周期长、产品收率有限，限制了这些材料的商业化。这里我们介绍一种通用的盐酸助粉策略，可以同时实现热、无压、环保、时间短、成本低、产品收率高的目标。所得Cs ₂ Na _0.9 Ag _0.1 In _0.95 Bi _0.05 Cl ₆微晶表现出明亮的自陷激子发射，量子产率为(98.3±3.8)%，在处理后仍保留(90.5±1.3)%和(96.8±0.8)%。分别连续加热或紫外线照射1000小时。荧光粉转换 LED 在约 200 mA 的电流下表现出从紫外芯片到自捕获激子发射的近乎一致的转换效率。各种离子掺杂（如Cs ₂ Na _0.9 Ag _0.1 InCl ₆ :Ln ³⁺ ）及其他衍生的高发光性能无铅钙钛矿材料（如Cs ₂ ZrCl ₆和Cs ₄ MnBi ₂ Cl ₁₂ ）均通过我们提出的策略已显示出良好的商业化可用性。