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Ferroelectric films, are an important class of photoelectric functional material, which possess the following characteristics: the breaking of their symmetry can lead to self-polarization and this polarization state can be regulated by external stimuli. The photovoltaic properties of ferroelectric films have been extensively investigated due to their potential applications in the field of photodetection, energy conversion harvesting and nonvolatile storage. In view of the small photocurrent density and the degradation of photovoltaic property caused by the depolarization effect in ferroelectric films, it is necessary to explore an approach to improving the self-polarization phenomenon and regulating the conduction mechanism to further optimize their photovoltaic properties. Here in this work, BiFeO3 (BFO) films dispersed with Au nanoparticles are deposited on FTO glass substrates by the sol-gel method to obtain the Au-BFO nanocomposite films. Moreover, the relationships between Au content (0 mol%, 0.25 mol%, 0.5 mol%, 1 mol% and 3 mol%) and microstructure, electrical and photovoltaic properties of Au-BFO nanocomposite films are investigated to determine the optimal Au content. Piezoresponse force microscopy studies show that the Au-BFO nanocomposite film with 0.5 mol% Au has the strong self-polarization phenomenon. With the increase of Au content, the conduction mechanism of the Au-BFO nanocomposite films is described by the space-charge limited current theory but not the Schottky emission model any more. The photovoltaic properties of the Au-BFO nanocomposite films first increase and then decrease. When Au content is 0.5 mol%, the Au-BFO nanocomposite film has the best photovoltaic property. The open-circuit voltage and short-circuit photocurrent density of the Au-BFO nanocomposite film with 0.5 mol% Au increase nearly 3 and 5 times counterparts of the BFO film, respectively. The photovoltaic effects of Au-BFO nanocomposite films are improved mainly by regulating the self-polarization phenomenon and conduction mechanism. This study demonstrates the merits of BFO films dispersed with Au nanoparticles, specifically, the photovoltaic properties of Au-BFO nanocomposite films are further optimized. In this work, we propose a simple and effective method to regulate the electrical and photovoltaic properties of ferroelectric films, which provides a new perspective for further understanding the photovoltaic effects of ferroelectric films.
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Keywords:
- BiFeO3 /
- electrical property /
- photovoltaic property
[1] 蔡田怡, 雎胜 2018 物理学报 67 157801Google Scholar
Cai T Y, Ju S 2018 Acta Phys. Sin. 67 157801Google Scholar
[2] Li D, Zheng D X, Jin C, Li P, Liu X J, Zheng W C, Bai H L 2018 Adv. Electron. Mater. 4 1800171Google Scholar
[3] Guo R, You L, Zhou Y, Lim Z S, Zou X, Chen L, Ramesh R, Wang J 2013 Nat. Commun. 4 1990Google Scholar
[4] Wu J, Fan Z, Xiao D, Zhu J, Wang J 2016 Prog. Mater. Sci. 84 335Google Scholar
[5] 朱立峰, 潘文远, 谢燕, 张波萍, 尹阳, 赵高磊 2019 物理学报 68 217701Google Scholar
Zhu L F, Pan W Y, Xie Y, Zhang B P, Yin Y, Zhao G L 2019 Acta Phys. Sin. 68 217701Google Scholar
[6] Wu J 2018 Advances in Lead-Free Piezoelectric Materials (New York: Springer) pp301–378
[7] Wang L, Jin K J, Ge C, Wang C, Guo H Z, Lu H B, Yang G Z 2013 Appl. Phys. Lett. 102 252907Google Scholar
[8] Kamala Bharathi K, Lee W M, Ho Sung J, Soo Lim J, Jin Kim S, Chu K, Won Park J, Hyun Song J, Jo M H, Yang C H 2013 Appl. Phys. Lett. 102 012908Google Scholar
[9] Bai Y, Wang Z J, He B, Cui J Z, Zhang Z D 2017 ACS Omega 2 9067Google Scholar
[10] Zhang W, Yang M M, Liang X, Zheng H W, Wang Y, Gao W X, Yuan G L, Zhang W F, Li X G, Luo H S, Zheng R K 2015 Nano Energy 18 315Google Scholar
[11] Zhang Y, Zheng H, Wang X, Li H, Wu Y, Zhang Y, Su H, Yuan G 2020 Ceram. Int. 46 10083Google Scholar
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[13] Xie Z, Yang Y, Fang L, Wang Y, Ding X, Yuan G, Liu J M 2019 App. Phys. Lett. 115 112902Google Scholar
[14] Wang Y, Nan C W 2006 Appl. Phys. Lett. 89 052903Google Scholar
[15] Wang H L, Ning X K, Wang Z J 2015 RSC Adv. 5 76783Google Scholar
[16] Wang Z, Hu T, Tang L, Ma N, Song C, Han G, Weng W, Du P 2008 Appl. Phys. Lett. 93 222901Google Scholar
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[19] Maruyama R, Sakamoto W, Yuitoo I, Takeuchi T, Hayashi K, Yogo T 2016 Jpn. J. Appl. Phys. 55 10TA14Google Scholar
[20] Almusallam A, Luo Z, Komolafe A, Yang K, Robinson A, Torah R, Beeby S 2017 Nano Energy 33 146Google Scholar
[21] Yang X, Su X, Shen M, Zheng F, Xin Y, Zhang L, Hua M, Chen Y, Harris V G 2012 Adv. Mater. 24 1202Google Scholar
[22] Li F Z, Zheng H W, Zhu M S, Zhang X A, Yuan G L, Xie Z S, Li X H, Yue G T, Zhang W F 2017 J. Mater. Chem. C 5 10615Google Scholar
[23] Eerenstein W, Morrison F D, Dho J, Blamire M G, Scott J F, Mathur N D 2005 Science 307 1203aGoogle Scholar
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[28] Cheng C W, Tseng Y C, Wu T B, Chou L J 2004 J. Mater. Res. 19 1043Google Scholar
[29] Kim Y, Cho Y, Hong S, Bühlmann S, Park H, Min D K, Kim S H, No K 2006 Appl. Phys. Lett. 89 172909Google Scholar
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图 5 Au-BFO纳米复合薄膜的面外PFM相位图像, 其中Au含量为 (a) 0 mol%, (b) 0.25 mol%, (c) 0.5 mol%, (d) 1 mol%, (e) 3 mol%; (f) 向上的自极化Pup所占比例随Au含量的变化
Figure 5. Out-of-plane PFM phase images of the Au-BFO nanocomposite films with (a) 0 mol%, (b) 0.25 mol%, (c) 0.5 mol%, (d) 1 mol%, (e) 3 mol%; (f) the variation of the ratio of Pup with Au content.
图 6 Au-BFO纳米复合薄膜在 (a) 暗态下的电流密度-电压(J-V)曲线; (b) 正电压段和(c) 负向电压段的lnJ-V1/2和lnJ-lnV曲线分别符合肖特基发射和空间电荷限制电流机制
Figure 6. Current density vs. voltage (J-V) characteristics of the Au-BFO nanocomposite films (a) in dark; lnJ vs. V1/2 curves fitted using the Schottky emission and lnJ vs. lnV curves fitted using space-charge limited current for the (b) positive and (c) negative branches.
图 7 Au-BFO纳米复合薄膜的 (a) 光电流密度-电压(J-V)曲线(Au含量为0, 0.25 mol%, 0.5 mol%, 1 mol%和3 mol%)和(b) 开路电压和短路电流密度随Au含量的变化
Figure 7. (a) Photovoltaic (J-V) curves of the Au-BFO nanocomposite films with 0, 0.25 mol%, 0.5 mol%, 1 mol%, and 3 mol% Au, and (b) variation of open-circuit voltages and short-circuit photocurrent densities with Au content.
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[1] 蔡田怡, 雎胜 2018 物理学报 67 157801Google Scholar
Cai T Y, Ju S 2018 Acta Phys. Sin. 67 157801Google Scholar
[2] Li D, Zheng D X, Jin C, Li P, Liu X J, Zheng W C, Bai H L 2018 Adv. Electron. Mater. 4 1800171Google Scholar
[3] Guo R, You L, Zhou Y, Lim Z S, Zou X, Chen L, Ramesh R, Wang J 2013 Nat. Commun. 4 1990Google Scholar
[4] Wu J, Fan Z, Xiao D, Zhu J, Wang J 2016 Prog. Mater. Sci. 84 335Google Scholar
[5] 朱立峰, 潘文远, 谢燕, 张波萍, 尹阳, 赵高磊 2019 物理学报 68 217701Google Scholar
Zhu L F, Pan W Y, Xie Y, Zhang B P, Yin Y, Zhao G L 2019 Acta Phys. Sin. 68 217701Google Scholar
[6] Wu J 2018 Advances in Lead-Free Piezoelectric Materials (New York: Springer) pp301–378
[7] Wang L, Jin K J, Ge C, Wang C, Guo H Z, Lu H B, Yang G Z 2013 Appl. Phys. Lett. 102 252907Google Scholar
[8] Kamala Bharathi K, Lee W M, Ho Sung J, Soo Lim J, Jin Kim S, Chu K, Won Park J, Hyun Song J, Jo M H, Yang C H 2013 Appl. Phys. Lett. 102 012908Google Scholar
[9] Bai Y, Wang Z J, He B, Cui J Z, Zhang Z D 2017 ACS Omega 2 9067Google Scholar
[10] Zhang W, Yang M M, Liang X, Zheng H W, Wang Y, Gao W X, Yuan G L, Zhang W F, Li X G, Luo H S, Zheng R K 2015 Nano Energy 18 315Google Scholar
[11] Zhang Y, Zheng H, Wang X, Li H, Wu Y, Zhang Y, Su H, Yuan G 2020 Ceram. Int. 46 10083Google Scholar
[12] Swain A B, Rath M, Pal S, Ramachandra Rao M S, Subramanian V, Murugavel P 2018 Appl. Phys. Lett. 113 233902Google Scholar
[13] Xie Z, Yang Y, Fang L, Wang Y, Ding X, Yuan G, Liu J M 2019 App. Phys. Lett. 115 112902Google Scholar
[14] Wang Y, Nan C W 2006 Appl. Phys. Lett. 89 052903Google Scholar
[15] Wang H L, Ning X K, Wang Z J 2015 RSC Adv. 5 76783Google Scholar
[16] Wang Z, Hu T, Tang L, Ma N, Song C, Han G, Weng W, Du P 2008 Appl. Phys. Lett. 93 222901Google Scholar
[17] Li Y Z, Wang Z J, Bai Y, Liu W, Zhang Z D 2019 J. Am. Ceram. Soc. 102 5253Google Scholar
[18] Zhang P, Wang T, Gong J 2015 Adv. Mater. 27 5328Google Scholar
[19] Maruyama R, Sakamoto W, Yuitoo I, Takeuchi T, Hayashi K, Yogo T 2016 Jpn. J. Appl. Phys. 55 10TA14Google Scholar
[20] Almusallam A, Luo Z, Komolafe A, Yang K, Robinson A, Torah R, Beeby S 2017 Nano Energy 33 146Google Scholar
[21] Yang X, Su X, Shen M, Zheng F, Xin Y, Zhang L, Hua M, Chen Y, Harris V G 2012 Adv. Mater. 24 1202Google Scholar
[22] Li F Z, Zheng H W, Zhu M S, Zhang X A, Yuan G L, Xie Z S, Li X H, Yue G T, Zhang W F 2017 J. Mater. Chem. C 5 10615Google Scholar
[23] Eerenstein W, Morrison F D, Dho J, Blamire M G, Scott J F, Mathur N D 2005 Science 307 1203aGoogle Scholar
[24] Fang L, Liu J, Ju S, Zheng F, Dong W, Shen M 2010 Appl. Phys. Lett. 97 242501Google Scholar
[25] Zhao Z, Buscaglia V, Viviani M, Buscaglia M T, Mitoseriu L, Testino A, Nygren M, Johnsson M, Nanni P 2004 Phys. Rev. B 70 024107Google Scholar
[26] Tsutsumi N, Kosugi R, Kinashi K, Sakai W 2016 ACS Appl. Mater. Interfaces 8 16816Google Scholar
[27] Paik H, Choi Y Y, Hong S, No K 2015 Sci. Rep. 5 13209Google Scholar
[28] Cheng C W, Tseng Y C, Wu T B, Chou L J 2004 J. Mater. Res. 19 1043Google Scholar
[29] Kim Y, Cho Y, Hong S, Bühlmann S, Park H, Min D K, Kim S H, No K 2006 Appl. Phys. Lett. 89 172909Google Scholar
[30] Sun W, Zhou Z, Luo J, Wang K, Li J F 2017 J. Appl. Phys. 121 064101Google Scholar
[31] He B, Wang Z 2016 ACS Appl. Mater. Interfaces 8 6736Google Scholar
[32] Yang T, Wei J, Guo Y, Lv Z, Xu Z, Cheng Z 2019 ACS Appl. Mater. Interfaces 11 23372Google Scholar
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