植物补光用In^(3+)掺杂Zn_(3)Ga_(2)Ge_(2)O_(10)∶Cr^(3+)远红光发光材料的性能研究  

Performance of In^(3+)Doped Zn_(3)Ga_(2)Ge_(2)O_(10)∶Cr^(3+)Far-Red Light Emitting Materials for Plant Light Supplement

作　　者：白琼宇 王春浩 BAI Qiongyu;WANG Chunhao(Institute of Photoelectric Technology,Hebei GEO University,Shijiazhuang 050031,China;Hebei Key Laboratory of Optoelectronic Information and Geo-Detection Technology,Shijiazhuang 050031,China)

机构地区：[1]河北地质大学光电技术研究所,石家庄050031 [2]河北省光电信息与地球探测技术重点实验室,石家庄050031

出　　处：《人工晶体学报》2024年第9期1568-1575,共8页Journal of Synthetic Crystals

基　　金：河北省高校基本科研业务费资助(QN202202);河北地质大学博士科研启动基金(BQ2024065)。

摘　　要：采用高温固相法制备了Cr^(3+)掺杂的远红光荧光粉,并通过引入In^(3+)对Zn_(3)Ga_(2)Ge_(2)O_(10)∶Cr^(3+)发光特性进行了调控。通过XRD对Zn_(3)(Ga_(1-x)In_(x))_(2)Ge_(2)O_(10)∶2%Cr^(3+)(摩尔分数)的晶体结构进行了分析。利用室温荧光光谱和热释光光谱分析了Zn_(3)(Ga_(1-x)In_(x))_(2)Ge_(2)O_(10)∶2%Cr^(3+)的发光特性,其发射光谱由^(4)T_(2)(^(4)F)→^(4)A_(2)和^(2)E→^(4)A_(2)跃迁的705、721 nm两发光峰叠加而成。随着Zn_(3)(Ga_(1-x)In_(x))_(2)Ge_(2)O_(10)∶2%Cr^(3+)中In^(3+)掺杂浓度增加,材料发射光谱呈现展宽的现象,这是Cr^(3+)所处晶体场环境的改变导致了晶体场劈裂程度的变化。光谱展宽后荧光材料的发光特性与植物中光敏色素吸收谱更加匹配,因此其有望应用于植物照明领域。此外,随着In^(3+)掺杂浓度增加,荧光材料表现出红色长余辉现象,并且余辉时间与In^(3+)掺杂浓度有关。Cr^(3+)doped Zn_(3)Ga_(2)Ge_(2)O_(10)∶Cr^(3+)far-red phosphor was synthesized by the high temperature solid state method,and the luminescent properties of Zn_(3)Ga_(2)Ge_(2)O_(10)∶Cr^(3+)was tuned by introducing In^(3+).The crystal structure of Zn_(3)(Ga_(1-x)In_(x))_(2)Ge_(2)O_(10∶)2%Cr^(3+)was determined by X-ray diffraction(XRD),and the luminescent properties were analysed using room-temperature photoluminescence spectra and thermoluminescence spectra.Zn3(Ga_(1-x)In_(x))_(2)Ge_(2)O_(10)∶2%Cr^(3+)exhibits a broad emission band,which is composed of two luminescent peaks at 705 and 721 nm from the transitions of^(4)T_(2)(^(4)F)→^(4)A_(2)and^(2)E→^(4)A_(2)respectively.As the In^(3+)doping concentration increases,the emission spectrum of Zn_(3)(Ga_(1-x)Inx)_(2)Ge_(2)O_(10)∶2%Cr^(3+)broadens.This broadening is attributed to the changes in the crystal field environment around the Cr^(3+),which leads to an increase in the full width at half maximum(FWHM)of the material's emission spectrum as the crystal field splitting becomes more pronounced.Therefore,Zn_(3)(Ga_(1-x)Inx)_(2)Ge_(2)O_(10)∶2%Cr^(3+)phosphors are expected to be applied in the field of plant lighting for their luminescence characteristics matching with the absorption spectrum of phytochrome in plants.Additionally,as the In^(3+)doping concentration increases,the phosphor material exhibits a red long afterlow phenomenon,and its afterglow duration is related to the In^(3+)doping concentration.

关 键 词：荧光粉 Zn_(3)Ga_(2)Ge_(2)O_(10)∶Cr^(3+) In^(3+)掺杂 远红光 阳离子替代 植物补光 

分 类 号：O482.31[理学—固体物理] TQ422[理学—物理]