Effect of Reaction Temperature on the Luminescence and Morphology of Na3ScF6∶Yb/Er Nanocrystals
ZHANG Li-gang1, MA Li-hong1*, ZHAO Su-ling2, XU Zheng2, YANG Hai-jun1, LI Chen-pu1, WANG Ke1, LIU Gui-xia1, BAI Yong-qing1, SHEN Wen-mei1
1. School of Science, Hebei University of Architecture,Zhangjiakou 075000,China
2. Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education; Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044, China
Abstract:At present, rare-earth ion-doped up-conversion luminescent materials (UCNP) have attracted widespread attention due to their massive potential of practical application in various fields like color display, biological imaging, solar cells, photodynamic therapy, solid-state lasers and more. Among various rare earth elements, Sc is situated at the top of the third main group and at the beginning of the transition element. With the minimum ionic radius, it demonstrates different physical and chemical properties to Y, Gd, and Lu-based materials. Although Na3ScF6 is regarded as a new and efficient host material for its consistent chemical properties and low phonon energy, there are still few studies focusing on it. Allowing for this, the solvothermal method was adopted in this study, with oleic acid (OA) and octadecene (ODE) as complexing agents. On the basis of OA∶ODE=10 mL∶10 mL and NaF∶Ln3+=4∶1, a series of monoclinic Na3ScF6∶Yb/Er nanocrystals were synthesized at the temperature of 260, 280, and 300 ℃, respectively. The phase, microstructure and upconversion luminescence properties of the samples were characterized by X-ray diffractometer, transmission electron microscope and fluorescence spectrometer, respectively. Research indicates: when the reaction temperature reached 260 ℃, the sample was monoclinic Na3ScF6∶Yb/Er (PDF No.47-1221) nanospheres with a particle size of about 20 nm; when the reaction temperature reached 300 ℃, the sample was monoclinic phase Na3ScF6∶Yb/Er (PDF No.20-1221) nanocrystals with a size of about 18 nm, exhibiting high crystallinity and excellent dispersion. Having a mixed phase of PDF No.47-1221 and PDF No.20-1221 at 280 ℃, the sample demonstrated uniform morphology and excellent dispersion, with a particle size of about 30 nm. Under the excitation of a 980 nm laser, the upconverted luminescence color of the sample shifted from red light to green light when the reaction temperature was raised from 260 to 300 ℃, while the luminous intensity showed a significant increase to about 3.1 times the original level. Moreover, a discussion was conducted about the evolution of the sample morphology with time at 300 ℃. This work achieves a controllable output of Na3ScF6∶Yb/Er nanocrystal upconversion luminescence color only by adjusting the reaction temperature, which not only provides a simple method for the regulation of red and green light, but also complements scandium-based fluoride and broadened the application scope of scandium-based nanomaterials.
Key words:Na3ScF6; Upconversion luminescence; Reaction time; Red light
张礼刚,马丽红,赵谡玲,徐 征,杨海军,李晨璞,王 克,刘桂霞,柏永清,沈文梅. 反应温度对Na3ScF6∶Yb/Er纳米晶的发光和形貌的影响[J]. 光谱学与光谱分析, 2022, 42(10): 3068-3072.
ZHANG Li-gang, MA Li-hong, ZHAO Su-ling, XU Zheng, YANG Hai-jun, LI Chen-pu, WANG Ke, LIU Gui-xia, BAI Yong-qing, SHEN Wen-mei. Effect of Reaction Temperature on the Luminescence and Morphology of Na3ScF6∶Yb/Er Nanocrystals. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(10): 3068-3072.
[1] Hong A R,Kyhm J H,Kang G,et al. Nano Letters,2021,21(11):4838.
[2] ZHAO Xiao-yan,QI Qian-yu,WANG Hong-shui(赵晓艳,齐倩玉,王洪水). Journal of Functional Materials(功能材料),2020,51(10):10129.
[3] Li C Y,Chen G C,Zhang Y J,et al. Journal of the American Chemical Society,2020,142(35):14789.
[4] ZHANG Li-gang,ZHAO Su-ling,XU Zheng,et al(张礼刚,赵谡玲,徐 征,等). Chinese Journal of Luminescence(发光学报),2019,40(7):829.
[5] DONG Jun,ZHANG Chen-xue,CHENG Xiao-tong, et al(董 军,张晨雪,程小同,等). Acta Physica Sinica(物理学报),2021,70(15):154208.
[6] Yang Z L,Kang Y L,Chu Y T,et al. Journal of the American Chemical Society,2018,140(50):17656.
[7] Chen B,Wang Y,Guo Y,et al. ACS Applied Materials & Interfaces,2021,13(2):2327.
[8] Sun L L,Shi S S,Geng H C,et al. ACS Applied Nano Materials,2021,4(10):11231.
[9] Liu Q,Sun Y,Yang T S,et al. Journal of the American Chemical Society,2011,133(43):17122.
[10] Teng X,Zhu Y H,Wei W,et al. Journal of the American Chemical Society,2012,134(20):8340.
[11] Pei W B,Wang L L,Wu J S,et al. Crystal Growth & Design,2015,15(6):2988.
[12] Pei W B,Chen B,Wang L L,et al. Nanoscale,2015,7(9):4048.
[13] Pang M,Feng J,Song S Y,et al. CrystEngComm,2013,15(35):6901.
[14] Cao J J,Yuan L,Hu S S,et al. CrystEngComm,2016,18(31):5940.
[15] Ai Y,Tu D T,Zheng W,et al. Nanoscale,2013,5(14):6430.
[16] Pang M,Zhai X S,Feng J,et al. Dalton Transactions, 2014, 43(26):10202.
[17] Zhang L G,Zhao S L,Liang Z Q,et al. Journal of Alloys and Compounds,2017,699:1.
[18] Mao Y N,Xian P F,Jiang L,et al. Dalton Transactions,2020,49(23):7862.
[19] Xiang G T,Liu X T,Xia Q,et al. Talanta,2021,224:121832.
[20] ZHANG Li-gang,ZHAO Su-ling,XU Zheng,et al(张礼刚,赵谡玲,徐 征,等). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2018,38(2):401.