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本文通过化学浴沉积法获得了直径约为50 nm, 长度约为250 nm的ZnO纳米棒阵列, 引入纳米ZnS对ZnO纳米棒进行表面修饰, 分别制备得到了具有ITO (indium tin oxides)/ZnO/Poly-(3-hexylthiophene) (P3HT)/Au和ITO/ZnO@ZnS/P3HT/Au结构的多层器件. 通过I-V曲线对比讨论了两种结构器件的开启电压, 串联电阻, 反向漏电流及整流比等参数, 认为包含ZnS修饰层器件的开启电压、串联电阻、反向漏电流明显降低, 整流比显著增强, 展现出更优异的电子传输性能. 光致发光光谱分析结果证实由于ZnS使ZnO纳米 棒的表面缺陷产生的非辐射复合被明显抑制, 弱化了电场激发下的载流子陷获, 改善了器件的导电特性.In this paper, the ZnO nanorod arrays (NRAs) with a diameter of 50nm and a length of 250 nm were synthesized by chemical bath deposition method. Two devices with structures of ITO (indium tin oxides)/ZnO/poly-(3-hexylthiophene) (P3HT)/Au and ITO/ZnO@ZnS/P3HT/Au were fabricated and their performances were tested and evaluated separately. The I-V curves were measured for discussion of the threshold voltage, series resistance, reverse leakage current, and rectification ratio. Results show that the device with modified ZnO shows a decline in the threshold voltage, series resistance and reverse leakage current, but has an enhanced rectification ratio. The effect of ZnS coating on the improvement of conductive properties of the device could be attributed to the suppression of the non-radiative recombination of surface defects as shown by means of photoluminescence spectrum.
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Keywords:
- ZnO NRAs /
- surface modification /
- I-V performance
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[23] Schroder D K 2005 Semiconductor material and device characterization (Hoboken: A Wiley-Interscience Publication) 779
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[25] Djurišić A B, Choy W C H, Roy V A L, Leung Y H, Kwong C Y, Cheah K W, Gundu R T K, Chan W K, Lui H F, Surya C 2004 Adv. Funct. Mater. 14 856
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[28] Matsushima T, Murata H 2009 Appl. Phys. Lett. 95 203306
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[1] Nguyen X S, Tay C B, Fitzgerald E A, Chua S J 2012 Small 8 1204
[2] Huang J Z, Li S S, Feng X P 2010 Acta Phys. Sin. 59 5839 (in Chinese) [黄金昭, 李世帅, 冯秀鹏 2010 59 5839]
[3] Bahadur L, Kushwaha S 2012 Appl. Phys. A 109 655
[4] Yan Y, Zhao S L, Xu Z, Gong W, Wang D W 2011 Acta Phys. Sin. 60 088803 (in Chinese) [闫悦, 赵谡玲, 徐征, 龚伟, 王大伟 2011 60 088803]
[5] Lee C Y, Wang J Y, Chou Y, Cheng C L, Chao C H, Shiu S C, Hung S C, Chao J J, Liu M Y, Su W F, Chen Y F, Lin C F 2009 Nanotechnology 20 425202
[6] Kathalingam A, Rhee J K 2012 Electron. Mater. 41 2162
[7] Bi D, Wu F, Yue W, Guo Y, Shen W, Peng R, Wu H, Wang X, Wang M. 2010 Phys. Chem. C 114 13846
[8] Shi L, Xu Y, Hark S, Liu Y, Wang S, Peng L, Wong K, Li Q 2007 Nano Lett. 7 3559
[9] He J H, Ke J J, Chang P H, Tsai K T, Yang P C, Chan I M 2012 Nanoscale 4 3399
[10] Wang R C, Lin H Y 2009 Appl. Phys. A 95 813
[11] Panigrahi S, Basak D 2011 Chem. Phys. Lett. 511 91
[12] Law M, Greene L E, Radenovic A, Kuykendall T, Liphardt J, Yang P 2006 Phys. Chem. B 110 22652
[13] Lu M Y, Song J, Lu M P, Lee C Y, Chen L J, Wang Z L 2009 Acs Nano 3 357
[14] Wang K, Chen J J, Zeng Z M, Tarr J, Zhou W L, Zhang Y, Yan Y F, Jiang C S, Pern J, Mascarenhas A 2010 Appl. Phys. Lett. 96 123105
[15] Bera A, Basak D 2010 Appl. Mater. & Inter. 2 408
[16] Liu Y R, Wang Z X, Yu J L, Xu H H 2009 Acta Phys. Sin. 58 8566 (in Chinese) [刘玉荣, 王智欣, 虞佳乐, 徐海红 2009 58 8566]
[17] Pingel P, Zen A, Abellón R D, Grozema F C, Siebbeles L D A, Neher D 2010 Adv. Funct. Mater. 20 2286
[18] Briseno A L, Holcombe T W, Boukai A I, Garnett E C, Shelton S W, Fréchet J J, Yang P D 2009 Nano Lett. 10 334
[19] McCullough R D, Ewbank P C 1998 Handbook of conducting polymers (New York: CRC PressI Llc) p225
[20] Yin L Q, Peng J B 2009 Acta Phys. Sin. 58 3456 (in Chinese) [尹丽琴, 彭俊彪 2009 58 3456]
[21] Peterson R B, Field C L, Gregg B A 2004 Langmuir 20 5114
[22] Nam W H, Lim Y S, Seo W S, Cho H K, Lee J Y 2011 Nano. Res. 13 5825
[23] Schroder D K 2005 Semiconductor material and device characterization (Hoboken: A Wiley-Interscience Publication) 779
[24] Lima S A M, Sigoli F A, Jafelicci M J, Davolos M R 2001 Int. J. Inorg. Mater. 3 749
[25] Djurišić A B, Choy W C H, Roy V A L, Leung Y H, Kwong C Y, Cheah K W, Gundu R T K, Chan W K, Lui H F, Surya C 2004 Adv. Funct. Mater. 14 856
[26] Tam K H, Cheung C K, Leung Y H, Djurišić A B, Ling C C, Beling C D, Fung S, Kwok W M, Chan W K, Phillips D L, Ding L, Ge W K 2006 Phys. Chem. B 110 20865
[27] Reddy N K, Ahsanulhaq Q, Kim J H, Hahn Y B 2008 Appl. Phys. Lett. 92 043127
[28] Matsushima T, Murata H 2009 Appl. Phys. Lett. 95 203306
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