Mn doped two-dimensional (2D) layered perovskites, are becoming excellent candidates as red phosphor because of their high quantum yields (QY) and enhanced stability. However, these Mn doped 2D layered perovskites can only be excited by the near UV light, which largely limits the development of perovskites. Herein, blue-excitable Mn-doped PEA₂(Pb/Mn)(Br/I)₄ PQDs are synthesized from anion exchange surface engineering strategy. After anion exchange, orange Mn²⁺ emission from exciton-to-Mn energy transfer is acquired under the excitation of 450 nm. The PEA₂(Pb/Mn)(Br/I)₄ compounds exhibit strong luminescence with photoluminescence (PL) QY of 52%, which is comparable to most of the reported red emitting phosphors. A prototype white light-emitting diode (WLED) with good optical performance was fabricated using commercial (Sr,Ba)₂SiO₄:Eu phosphor and as-prepared PEA₂(Pb/Mn)(Br/I)₄ as green and orange color converters, showing great potential in the applications of solid state lighting.

Mn掺杂的二维（2D）层状钙钛矿由于其高量子产率（QY）和增强的稳定性而成为红色荧光粉的极佳候选者。然而，这些Mn掺杂的2D层状钙钛矿只能由近紫外光激发，这在很大程度上限制了钙钛矿的发展。在此，通过阴离子交换表面工程策略合成了蓝色可激发Mn掺杂的PEA ₂（Pb / Mn）（Br / I）₄ PQD。阴离子交换后，在450 nm的激发下获得了从激子到Mn能量转移的橙色Mn ²⁺发射。PEA ₂（Pb / Mn）（Br / I）₄化合物显示出强发光，光致发光（PL）的QY为52％，与大多数报道的红色发光磷光体相当。使用市售的（Sr，Ba）₂ SiO ₄：Eu荧光粉和已制备的PEA ₂（Pb / Mn）（Br / I）₄作为绿色和橙色，制造了具有良好光学性能的原型白光发光二极管（WLED）。彩色转换器，在固态照明的应用中显示出巨大的潜力。