A new phosphor Y₂BaAl₄SiO₁₂: Ce³⁺, Cr³⁺ yielding much efficient energy transfer from Ce³⁺ to Cr³⁺ and strongly emitting deep-far red emission under blue LED excitation has been reported. The doping of Ce³⁺ into Y₂BaAl₄SiO₁₂: Cr³⁺ has greatly enhanced the excitation at blue region with increasing deep-far red emission more than three times. It is highly noticeable that an efficient energy transfer has assisted in the enhancement of the excitation for deep-far red emission illustrated through a stronger 4f→5d transition of Ce³⁺ than parity-forbidden ⁴A₂→⁴T₁ transition of Cr³⁺. The yellow emission of Ce³⁺ was almost completely depressed to nearly zero during the energy transition. The mechanism was considered as dipole-dipole interaction through the decay curve of the yellow emission, where the generation of a strong energy transfer in widely distributed Ce³⁺ and Cr³⁺ activators was proceeded through this interaction. It can intensively contribute to a new type of LED plant growth with inducing morphosis of plants under far red light.

一种新型荧光粉 Y ₂ BaAl ₄ SiO ₁₂ : Ce ³⁺ , Cr ³⁺产生了从 Ce ³⁺到 Cr ^{3+ 的}高效能量转移，并在蓝光 LED 激发下强烈发射深远红光。Ce ³⁺掺杂到Y ₂ BaAl ₄ SiO ₁₂ : Cr ³⁺大大增强了蓝色区域的激发，使深远红光发射增加了三倍以上。值得注意的是，有效的能量转移有助于增强深远红光发射的激发，这通过 Ce 更强的 4f→5d 跃迁来说明³⁺比奇偶禁止⁴ A ₂ → ⁴ T ₁ Cr ^{3+ 的}转变。在能量转换过程中，Ce ³⁺的黄色发射几乎完全抑制到接近零。该机制被认为是通过黄色发射的衰减曲线的偶极-偶极相互作用，其中通过这种相互作用在广泛分布的Ce ³⁺和Cr ³⁺活化剂中产生强能量转移。它可以在远红光下诱导植物形态变化，为新型LED植物生长做出贡献。