SrS∶Eu,Sm具有红外响应频带宽、效率高等特点,是一种理想的上转换荧光防伪材料。以高温固相法和共沉淀法规模化制备出SrS∶Eu,Sm和NaYF4∶Yb,Er上转换荧光粉(SrS-NaYF4 UCPs),通过共混后丝网印刷得到具有多波段、宽频带响应的安全防伪织物,织物经过日光下充能后在980nm激发光下印刷图案会逐渐变色发光,在850nm红外摄像头及智能手机红外镜头下可响应发光。通过扫描电子显微镜、X射线衍射仪和荧光光谱仪等多种表征手法,对所制备荧光粉结构、形貌以及发光性能进行了表征,证明了该织物在防伪、防偷拍领域广阔的应用前景。
SrS∶Eu,Sm is an ideal upconversion fluorescent anti-counterfeiting material because of its wide infrared response band and high efficiency.SrS∶Eu,Sm and NaYF4∶Yb,Er upconversion phosphors (SrS-NaYF4 UCPs) were prepared on a large scale by high-temperature solid-phase and co-precipitation methods,and the security anti-counterfeiting fabrics with multi-band and broadband responses were obtained by screen printing after blending.The fabric was charged under daylight and the printed pattern gradually changed color and glowed under 980nm excitation light,and could respond to glow under 850nm infrared camera and smartphone infrared lens.The structure,morphology and luminescence properties of the prepared phosphors were characterized by scanning electron microscopy,X-ray diffractometer and fluorescence spectrometer,which proved the broad application prospects of the fabric in the fields of anti-counterfeiting and anti-camcording.
[1] Kumar K,Mishra N K,Shwetabh K.UCNPs in solar,forensic,security ink,and anti-counterfeiting applications[J].Upconverting Nanoparticles:From Fundamentals to Applications,2022:319-346.
[2] Zhao X,Chen S,Ye C,et al.Triplet-triplet annihilation upconversion combined with afterglow phosphors for multi-dimensional anti-counterfeiting and encoding[J].Journal of Materials Chemistry C,2022,10(35):12853-12862.
[3] Yao W,Tian Q,Liu J,et al.Preparation and RGB upconversion optic properties of transparent anti-counterfeiting films[J].Nanoscale,2017,9(41):15982-15989.
[4] 杜海燕,杨志萍,孙家跃.上转换发光材料及发光效率研究及展望[J].化工新型材料,2009,37(9):5-7,13.
[5] 赵兵,祁宁.提高稀土上转换发光纳米材料荧光强度的方法[J].化工新型材料,2018,46(7):40-43,47.
[6] Han M,Oh S J,Park J H,et al.X-ray photoelectron spectroscopy study of CaS∶Eu and SrS∶Eu phosphors[J].Journal of Applied Physics,1993,73(9):4546-4549.
[7] Nanto H,Hirai Y,Ikeda M,et al.A novel image storage sensor using photostimulated luminescence in SrS∶Eu,Sm phosphor for electromagnetic waves such as X-rays,UV-rays and visible light[J].Sensors and Actuators A:Physical,1996,53(1-3):223-226.
[8] Wang J,Zhu Y,Grimes C A,et al.Multicolor lanthanide-doped CaS and SrS near-infrared stimulated luminescent nanoparticles with bright emission:application in broad-spectrum lighting,information coding,and bio-imaging[J].Nanoscale,2019,11(26):12497-12501.
[9] Wang J,He N,Zhu Y,et al.Highly-luminescent Eu,Sm,Mn-doped CaS up/down conversion nano-particles:application to ultra-sensitive latent fingerprint detection and in vivo bioimaging[J].Chemical Communications,2018,54(6):591-594.
[10] Lu L,Zhang X,Bai Z,et al.Synthesis of infrared up-conversion material SrS∶Eu,Sm[J].Advanced Powder Technology,2006,17(2):181-187.
[11] Shao S,Du K,Huang K,et al.Rapid synthesis and characterization of SrS∶Eu,Sm infrared up-conversion materials[J].Advanced Powder Technology,2014,25(5):1516-1519.
[12] Sun J Y,Sun R D,Du H Y.Synthesis and characterization of nanosized phpsphor SrS∶Eu2+,Sm3+ by a hydrothermal process[J].Advanced Materials Research,2011,295:531-534.
[13] 王英,郝振东,张霞,等.电子俘获材料SrS∶Eu,Sm,Er的光谱特性和光存储特性[J].发光学报,2013,34(3):251-256.
[14] Chen D,Xu W,Li X,et al.Near-infrared photo-stimulated red luminescence in Eu2+/Ln3+ (Ln=La-Lu)∶SrS persistent phosphors[J].Journal of Alloys and Compounds,2017,720:239-244.
[15] Liu Y,Chen Z,Fan Y,et al.Design of a novel optically stimulated luminescent dosimeter using alkaline earth sulfides doped with SrS∶Eu,Sm materials[J].Progress in Natural Science,2008,18(10):1203-1207.
[16] Wang J,Zhu Y,He N,et al.Tri-doped alkaline earth sulfide nanoparticles as a new class of highly efficient probe with near-IR stimulated fluorescence for in vivo and ultrasensitive bacteria targeted imaging[J].Sensors and Actuators B:Chemical,2020,305:127427.
[17] Liu Y,Chen Z,Fan Y,et al.The study on optically stimulated luminescence dosimeter based on the SrS∶Eu,Sm and CaS∶Eu,Sm[J].Chinese Physics B,2008,17(8):3156.
[18] 刘艳平,陈朝阳,范艳伟,等.荧光材料SrS∶Eu,Sm在辐射剂量测量中的应用[J].中国稀土学报,2008,26(3):381-384.
[19] 李健雄,余华,李珣,等.电子俘获材料的研究现状及在红外检测方面的应用[J].中国光学,2011,4(2):93-102.
[20] Lu L,Zhang X,Bai Z,et al.Synthesis and characterization of IR up-conversion material SrS∶Eu,Sm[J].Journal of Rare Earths,2005(S1):44-47.
[21] He Z,Wang Y,Sun L,et al.The role of Sm ions in optical storage of SrS∶Eu,Sm[J].Science in China Series A:Mathematics,2001,44(9):1189-1196.
[22] Suo H,Zhu Q,Zhang X,et al.High-security anti-counterfeiting through upconversion luminescence[J].Materials Today Physics,2021,21:100520.
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