CdSe/ZnS 나노결정 양자점 Pyrolysis 제조와 발광다이오드 소자로의 응용

강승희; 키란쿠마르; 손기철; 허훈회; 김경현; 허철; 김의태; Seung-Hee Kang; Kiran Kumar; Kee-Chul Son; Hoon-Hoe Huh; Kyung-Hyun Kim; Chul Huh; Eui-Tae Kim

Korean Journal of Materials Research, Vol.18, No.7, 379-383, July, 2008

DOI10.3740/MRSK.2008.18.7.379 Export Citation

CdSe/ZnS 나노결정 양자점 Pyrolysis 제조와 발광다이오드 소자로의 응용

Pyrolysis Synthesis of CdSe/ZnS Nanocrystal Quantum Dots and Their Application to Light-Emitting Diodes

강승희, 키란쿠마르, 손기철, 허훈회, 김경현¹, 허철¹, 김의태^†

충남대학교 나노공학부 재료공학과
¹한국전자통신연구원

Seung-Hee Kang, Kiran Kumar, Kee-Chul Son, Hoon-Hoe Huh, Kyung-Hyun Kim¹, Chul Huh¹, and Eui-Tae Kim^†

Division of Nano Engineering, Chungnam National University, Daejeon 305-764, Korea
¹Electronics and Telecommunications Research Institute, Daejeon 305-350, Korea

E-mail:

We report on the light-emitting diode (LED) characteristics of core-shell CdSe/ZnS nanocrystal quantum dots (QDs) embedded in TiO2thin films on a Si substrate. A simple p-n junction could be formed when nanocrystal QDs on a p-type Si substrate were embedded in ~5 nm thick TiO2 thin film, which is inherently an n-type semiconductor. The TiO2 thin film was deposited over QDs at 200oC using plasma-enhanced metallorganic chemical vapor deposition. The LED structure of TiO2/QDs/Si showed typical p-n diode currentvoltage and electroluminescence characteristics. The colloidal core-shell CdSe/ZnS QDs were synthesized via pyrolysis in the range of 220-280oC. Pyrolysis conditions were optimized through systematic studies as functions of synthesis temperature, reaction time, and surfactant amount.

Keywords:CdSe/ZnS nanocrystal light-emitting diode;colloidal quantum dots;TiO2;pyrolysis;chemical vapor deposition

[References]

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Kang SH, Son KC, Huh HH, Lee CS, Kim KH, Huh C, Kim ET, Phys. Status Solidi A-Appl. Res., (in press)

[Referenced By]

[1] Bimberg D, Grundmann M, Ledentsov NN, Quantum Dot Heterostructures, p.1, Wiley, Chichester, (1999). (1999)

[2] Kim ET, Chen ZH, Madhukar A, Appl. Phys. Lett., 79, 3341 (2001)

[3] Alivisatos AP, Science, 271(5251), 933 (1996)

[4] Peng XG, Manna L, Yang WD, Wickham J, Scher E, Kadavanich A, Alivisatos AP, Nature, 404(6773), 59 (2000)

[5] Murray CB, Norris DJ, Bawendi MG, J. Am. Chem. Soc., 115, 8706 (1993)

[6] Coe S, Woo WK, Bawendi M, Bulovic V, Nature, 420, 800 (2002)

[7] Bruchez M, Moronne M, Gin P, Weiss S, Alivisatos AP, Science, 281(5385), 2013 (1998)

[8] Chan WCW, Nie SM, Science, 281(5385), 2016 (1998)

[9] Dubertret B, Paris P, Norris DJ, Noireaux V, Brivanlouand AH, Libchaber A, Science, 298, 1759 (2002)

[10] Lee J, Sundar VC, Heine JR, Bawendi MG, Jensen KF, Adv. Mater., 15, 1102 (2000)

[11] Huynh W, Dittmer JJ, Alivisatos AP, Science, 295, 2425 (2002)

[12] Eisler HJ, Sundar VC, Bawendi MG, Walsh M, Smith HI, Klimov V, Appl. Phys. Lett., 80, 4014 (2002)

[13] Chan Y, Steckel JS, Snee PT, Caruge JM, Hodgkiss JM, Nocera DG, Bawendi MG, Appl. Phys. Lett., 86, 073102 (2005)

[14] Thompson W, Philos. Mag. B-Phys. Condens. Matter Stat. Mech. Electron. Opt. Magn. Prop., 42, 449 (1871)

[15] Kang SH, Son KC, Huh HH, Lee CS, Kim KH, Huh C, Kim ET, Phys. Status Solidi A-Appl. Res., (in press)