산화아연/황화아연 양자점 나노결정에서의 향상된 자외선 방출

김기은; 김웅; 성윤모; Ki-Eun Kim; Woong Kim; Yun-Mo Sung

Korean Journal of Materials Research, Vol.18, No.12, 640-644, December, 2008

DOI10.3740/MRSK.2008.18.12.640 Export Citation

산화아연/황화아연 양자점 나노결정에서의 향상된 자외선 방출

Enhanced UV-Light Emission in ZnO/ZnS Quantum Dot Nanocrystals

김기은, 김웅 , 성윤모 ^†

고려대학교 신소재공학부

Ki-Eun Kim, Woong Kim , and Yun-Mo Sung^†

Department of Materials Science & Engineering, Korea University, Seoul 136-713, South Korea

E-mail:

ZnO/ZnS core/shell nanocrystals (~5-7 nm in diameter) with a size close to the quantum confinement regime were successfully synthesized using polyol and thermolysis. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) analyses reveal that they exist in a highly crystalline wurtzite structure. The ZnO/ZnS nanocrystals show significantly enhanced UV-light emission (~384 nm) due to effective surface passivation of the ZnO core, whereas the emission of green light (~550 nm) was almost negligible. They also showed slight photoluminescence (PL) red-shift, which is possibly due to further growth of the ZnO core and/or the extension of the electron wave function to the shell. The ZnO/ZnS core/shell nanocrystals demonstrate strong potential for use as low-cost UV-light emitting devices.

Keywords:ZnO/ZnS;ZnO;nanocrystals;photoluminescence;UV-emission

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Kwak WC, Kim TG, Chae WS, Sung YM, Appl. Phys. Lett., 90, 173111 (2007)
Noack V, Weller H, Eychmuller A, J. Phys. Chem. B, 106(34), 8514 (2002)
Rodriguez JA, Jirsak T, Dvorak J, Sambasivan S, Fischer D, J. Phys. Chem. B, 104(2), 319 (2000)
Lee MK, Kim TG, Kim W, Sung YM, J. Phys. Chem. C., 112, 10079 (2008)
Bravner R, Ferrari-Iliou R, Brivois N, Djediat S, Benedetti MF, Fievet F, Nano Lett., 6, 866 (2006)
Gao T, Li QH, Wang TH, Chem. Mater., 17, 887 (2005)
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Treu-Tler O, Ahelrichs RJ, Chem. Phys., 102, 246 (1995)
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Vanheusden K, Warren L, Seager H, Tallant R, Voigt A, Gnade BE, J. Appl. Phys., 79, 7983 (1996)
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[Related Articles]

[1] Murray CB, Norris DJ, Bawendi MG, J. Am. Chem. Soc., 1158, 8706 (1993)

[2] Colvin VL, Schlamp MC, Alivisatos AP, Nature, 370(6488), 354 (1994)

[3] Sung YM, Lee YJ, Park KS, J. Am. Chem. Soc., 128, 9003 (2006)

[4] Hsu JP, Tian ZR, Simmons NC, Matzke CM, Voigt JA, Liu J, Nano Lett., 5, 83 (2005)

[5] Dabbousi BO, Rodriguezviejo J, Mikulec FV, Heine JR, Mattoussi H, Ober R, Jensen KF, Bawendi MG, J. Phys. Chem. B, 101(46), 9463 (1997)

[6] Artemyev MV, Woggon U, Wannemacher R, Jaschinski H, Langbein W, Nano Lett., 1, 309 (2001)

[7] Kwak WC, Kim TG, Chae WS, Sung YM, Appl. Phys. Lett., 90, 173111 (2007)

[8] Noack V, Weller H, Eychmuller A, J. Phys. Chem. B, 106(34), 8514 (2002)

[9] Rodriguez JA, Jirsak T, Dvorak J, Sambasivan S, Fischer D, J. Phys. Chem. B, 104(2), 319 (2000)

[10] Lee MK, Kim TG, Kim W, Sung YM, J. Phys. Chem. C., 112, 10079 (2008)

[11] Bravner R, Ferrari-Iliou R, Brivois N, Djediat S, Benedetti MF, Fievet F, Nano Lett., 6, 866 (2006)

[12] Gao T, Li QH, Wang TH, Chem. Mater., 17, 887 (2005)

[13] Murcia MJ, Shaw DL, Woodruff H, Naumann CA, Young BA, Long EC, Chem. Mater., 18, 2219 (2006)

[14] Song JH, Atay T, Shi S, Urabe H, Nurmikko AV, Nano Lett., 5, 1557 (2005)

[15] Wang Y, Tang ZY, Correa-Duarte MA, Liz-Marzan LM, Kotov NA, J. Am. Chem. Soc., 125(10), 2830 (2003)

[16] Ding Y, Wang XD, Wang ZL, Chem. Phys. Lett., 398(1-3), 32 (2004)

[17] Li JH, Zhao DX, Meng XQ, Zhang ZZ, Zhang JY, Shen DZ, Lu YM, Fan XW, J. Phys. Chem. B, 110(30), 14685 (2006)

[18] Geng J, Liu B, Xu L, Hu FN, Zhu JJ, Langmuir, 23(20), 10286 (2007)

[19] Sapra S, Sarma DD, Phys. Rev. B., 69, 125304 (2004)

[20] Kim CG, Sung K, Chung TM, Jung DY, Kim Y, Chem. Comm., 16, 2068 (2003)

[21] Ashby EC, Willard GF, Goel AB, J. Org. Chem., 44, 1221 (1979)

[22] Treu-Tler O, Ahelrichs RJ, Chem. Phys., 102, 246 (1995)

[23] Ethayaraja M, Ravikumar C, Muthkumaran D, Dutta K, Bandyopadhyaya R, J. Phys. Chem. C., 111, 3246 (2007)

[24] Vanheusden K, Warren L, Seager H, Tallant R, Voigt A, Gnade BE, J. Appl. Phys., 79, 7983 (1996)

[25] van Dijken A, Meulenkamp EA, Vanmaekelbergh D, Meijerink A, J. Phys. Chem. B, 104(8), 1715 (2000)

[26] Sekiguchi T, Ohashi N, Terada Y, J. Appl. Phys., 36, L289 (1997)