浏览全部资源
扫码关注微信
发光学及应用国家重点实验室 中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033
收稿日期:2011-08-16,
修回日期:2011-10-19,
网络出版日期:2012-01-10,
纸质出版日期:2012-01-10
移动端阅览
王秀英, 刘学彦, 赵家龙. CuInS<sub>2</sub>纳米晶的制备和发光性质[J]. 发光学报, 2012,33(1): 7-11
WANG Xiu-ying, LIU Xue-yan, ZHAO Jia-long. Synthesis and Luminescence Properties of CuInS<sub>2</sub> Nanocrystals[J]. 发光学报, 2012,33(1): 7-11
王秀英, 刘学彦, 赵家龙. CuInS<sub>2</sub>纳米晶的制备和发光性质[J]. 发光学报, 2012,33(1): 7-11 DOI: 10.3788/fgxb20123301.0007.
WANG Xiu-ying, LIU Xue-yan, ZHAO Jia-long. Synthesis and Luminescence Properties of CuInS<sub>2</sub> Nanocrystals[J]. 发光学报, 2012,33(1): 7-11 DOI: 10.3788/fgxb20123301.0007.
以十二硫醇为溶剂
通过选择合适的金属源制备了各种尺寸的CuInS
2
量子点。观察到随着粒子的尺寸减小
其吸收和发光光谱明显蓝移
存在明显的量子尺寸效应。通过在CuInS
2
纳米晶表面包覆ZnS壳层
发现随着壳层厚度增加
其发光量子效率明显提高
最大达到了48%;继续增加壳层厚度
其发光量子效率反而降低。进一步测量它们的荧光寿命
发现包覆ZnS壳层后的CuInS
2
纳米晶的荧光寿命明显增加
证实表面包覆明显减少其表面的无辐射复合中心
提高了其发光效率。进一步制备了CuInS
2
/ZnS核壳量子点发光二极管
并对其电致发光性质进行了研究。
CuInS
2
nanocrystals were prepared by heating inorganic metal salt and dodecanethiol. It was found that absorption edge and photoluminescence peak shifted to shorter wavelength with decreasing the nanocrystal size due to quantum size effect. The overgrowth of as-prepared nanocrystals with a few monolayers of ZnS shell improved the photoluminescence quantum efficiency up to 48%. Further photoluminescence decays of CuInS
2
nanocrystals were measured at room temperature. CuInS
2
/ZnS core/shell nanocrystals exhibited a longer photoluminescence lifetime
compared with the naked CuInS
2
nanocrystals. This is because the surface coating of the ZnS shell passiviated the defects on the surface of CuInS
2
nanocrystals and improved the photoluminescence quantum yield. Finally
CuInS
2
/ZnS core/shell quantum dot light emitting diodes were fabricated and their electroluminescence properties were studied.
Tan Z, Zhang Y, Xie C, et al. Employing heavy metal-free colloidal quantum dots in solution-processed white light-emitting diodes [J]. Nano Lett., 2011, 11(2):329-332.[2] Tan Z, Zhang Y, Xie C, et al. Near-band-edge electroluminescence from heavy-metal- free colloidal quantum dots [J]. Adv. Mater., 2011, 23(31):3553-3558.[3] Nakamura H, Kato W, Uehara M. Tunable photoluminescence wavelength of chalcopyrite CuInS2-based semiconductor nanocrystals synthesized in a colloidal system [J]. Chem. Mater., 2006, 18(14):3330-3335.[4] Uehara M, Watanabe K, Tajiri Y, et al. Synthesis of CuInS2 fluorescent nanocrystals and enhancement of fluorescence by controlling crystal defect [J]. J. Chem. Phys., 2008, 129(13):134709-1-6.[5] Tang X, Cheng W, Choo E S G, et al. Synthesis of CuInS2-ZnS alloyed nanocubes with high luminescence [J]. Chem. Commun., 2011, 47(18):5217-5219.[6] Li B, Xie Y, Huang J X, et al. Synthesis by a solvothermal route and characterization of CuInSe2 nanowhiskers and nano-particles [J]. Adv. Mater., 1999, 11(17):1456-1459.[7] Castro S L, Bailey S G, Raffaelle R P, et al. Synthesis and characterization of colloidal CuInS2 nanoparticles from a molecular single-source precursor [J]. J. Phys. Chem. B, 2004, 108(33):12429-12434.[8] Castro S L, Bailey S G, Raffaelle R P, et al. Nanocrystalline chalcopyrite materials (CuInS2 and CuInSe2) via low-temperature pyrolysis of molecular single-source precursors [J]. Chem. Mater., 2003, 15(16):3142-3147.[9] Nairn J J, Shapiro P J, Twamley B, et al. Preparation of ultrafine chalcopyrite nanoparticles via the photochemical decomposition of molecular single-source precursors [J]. Nano Lett., 2006, 6(6):1218-1223.[10] Norako M E, Franzman M A, Brutchey R L. Growth kinetics of monodisperse Cu-In-S nanocrystals using a dialkyl disulfide sulfur source [J]. Chem. Mater., 2009, 21(18):4299-4304.[11] Zhong H Z, Zhou Y, Ye M F, et al. Controlled synthesis and optical properties of colloidal ternary chalcogenide CuInS2 nanocrystals [J]. Chem. Mater., 2008, 20(20):6434-6443.[12] Xie R G, Rutherford M, Peng X G. Formation of high-quality Ⅰ -Ⅲ-Ⅵ semiconductor nanocrystals by tuning relative reactivity of cationic precursors [J]. J. Am. Chem. Soc., 2009, 131(15):5691-5697.[13] Li L, Pandey A, Werder D J, et al. Efficient synthesis of highly luminescent copper indium sulfide-based core/shell nanocrystals with surprisingly long-lived emission [J]. J. Am. Chem. Soc., 2011, 133(5):1176-1179.[14] Hofhuis J, Schoonman J, Goossens A. Elucidation of the excited-state dynamics in CuInS2 thin films [J]. J. Phys. Chem. C, 2008, 112(38):15052-15059.[15] Ueng H Y, Hwang H L. The defect structure of CuInS2 partⅠ:Intrinsic defects [J]. J. Phys. Chem. Solids, 1989, 50(12):1297-1305.[16] Nose K, Omata T, Otsuka-Yao-Matsuo S. Colloidal synthesis of ternary copper indium diselenide quantum dots and their optical properties [J]. J. Phys. Chem. C, 2009, 113(9):3455-3460.[17] Nam D, Song W, Yang H. Noninjection, one-pot synthesis of Cu-deficient CuInS2/ZnS core/shell quantum dots and their fluorescent properties [J]. J. Colloid Interface Sci., 2011, 361(2):491-496.
0
浏览量
119
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构