Synthesis and thermal annealing treatment of octylphosphonic acid-capped CdSe-tetrapod nanocrystals for bulk hetero-junction solar cell applications

Nguyen Tam Nguyen Truong; Kieu Thanh Trinh; Viet Thanh Hau Pham; Chang Duk Kim; Chinho Park

Korean Journal of Chemical Engineering, Vol.32, No.4, 761-766, April, 2015

DOI10.1007/s11814-014-0300-3 Export Citation

Synthesis and thermal annealing treatment of octylphosphonic acid-capped CdSe-tetrapod nanocrystals for bulk hetero-junction solar cell applications

Nguyen Tam Nguyen Truong, Kieu Thanh Trinh, Viet Thanh Hau Pham, Chang Duk Kim, and Chinho Park^†

School of Chemical Engineering, Yeungnam University, 280, Daehak-ro, Gyeongsan 712-749, Korea

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CdSe-tetrapod nanocrystals (NCs) were synthesized by using octylphosphonic acid (OPA) as a capping ligand and cadmium oxide (CdO) as a cadmium precursor. The effects of thermal annealing in nitrogen (N2) environment on the chemical composition, morphology, crystal structure and optoelectronic properties of the CdSe-tetrapods have been investigated. Remarkable difference in the morphological and optoelectronic properties between as-synthesized and N2-annealed CdSe NCs was observed. The photoluminescence (PL) peak of N2-annealed CdSe NCs shifted to lower energy and UV-vis absorption spectra shifted to longer wavelength, indicating the size increase and improvement of the crystallinity of the CdSe tetrapods. The power conversion efficiency of bulk hetero-junction solar cells made with the annealed CdSe NCs showed higher value compared with the efficiency of cells made with as-synthesized CdSe NCs.

Keywords:Photoluminescence;Absorption;Red-shift;Surface Roughness;CdSe;Bulk Hetero-junction Solar Cells

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[Referenced By]

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

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

[3] Brus LE, J. Chem. Phys., 90, 2555 (1986)

[4] Jun YW, Jung YY, Cheon J, Bulovic V, Nature, 420, 800 (2002)

[5] Ahmadi TS, Wang ZL, Green TC, Henglein A, Elsayed MA, Science, 272(5270), 1924 (1996)

[6] Schlamp MC, Peng XG, Alivistos AP, J. Appl. Phys., 82, 5837 (1997)

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

[8] Huynh WU, Dittmer JJ, Alivistos AP, Science, 295, 2425 (2002)

[9] Truong NTN, Park C, J. Japn. Appl. Phys., 51, 10NE27 (2012)

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

[11] Farva U, Park C, Sol. Energy Mater. Sol. Cells, 94(2), 303 (2010)

[12] Dayal S, Kopidakis N, Olson D, Ginley DS, Rumbles G, Nano Lett., 10, 239 (2010)

[13] Lee H, Yoon SW, Ahn JP, Suh YD, Lee JS, Lim H, Kim D, Sol. Energy Mater. Sol. Cells, 93(6-7), 779 (2009)

[14] Truong NTN, Nguyen TPN, Park C, Int. J. Photoenergy, 10.1155/2013/146582, 146582, 7 (2013)

[15] Chou PT, Chen CY, Cheng CT, Pu SC, Wu KC, Cheng YM, Lai CW, Chou YH, Chiu HT, J. Chem. Phys. Phys. Chem., 7, 222 (2006)

[16] Yu WW, Wang YA, Peng XG, Chem. Mater., 15, 4300 (2003)

[17] Pang Q, Zhao LJ, Cai Y, Nguyen DP, Bastard G, Wang JN, Chem. Mater., 17, 5263 (2005)

[18] Katari JE, Colvin VL, Alivisatos AP, J. Phys. Chem., 98(15), 4109 (1994)

[19] Alivisatos AP, J. Phys. Chem., 100(31), 13226 (1996)

[20] Lorenz JK, Ellis AB, J. Am. Chem. Soc., 120(42), 10970 (1998)

[21] Myung N, Bae Y, Bard AJ, Nano Lett., 3, 947 (2003)

[22] Kuno M, Lee JK, Dabbousi BO, Mikulec FV, Bawendi MG, J. Chem. Phys., 106(23), 9869 (1997)

[23] Vesely CJ, Langer DW, Phys. Rev. B, 4, 451 (1971)

[24] Wangner CD, Handbook of X-ray Photoelectron Spectroscopy, Perkin-Elmer, Eden Prairie, MN (1979). (1979)

[25] Masson DP, Lockwood DJ, Graham MJ, J. Appl. Phys., 82, 1632 (1997)

[26] Yang Q, Tang K, Wang F, Wang C, Quian Y, Mater. Lett., 57, 3508 (2003)

[27] Hoth N, Schilinsky P, Choulis SA, Brabec CJ, Nano Lett., 8, 2806 (2008)