Shaanxi Joint Laboratory of Graphene, State Key Laboratory Incubation Base of Photoelectric Technology and Functional Materials, International Collaborative Center on Photoelectric Technology, and Nano Functional Materials, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710069, China
Abstract An in-depth understanding of the photoconductivity and photocarrier density at the interface is of great significance for improving the performance of optoelectronic devices. However, extraction of the photoconductivity and photocarrier density at the heterojunction interface remains elusive. Herein, we have obtained the photoconductivity and photocarrier density of 173 nm Sb2Se3/Si (type-I heterojunction) and 90 nm Sb2Se3/Si (type-II heterojunction) utilizing terahertz (THz) time-domain spectroscopy (THz-TDS) and a theoretical Drude model. Since type-I heterojunctions accelerate carrier recombination and type-II heterojunctions accelerate carrier separation, the photoconductivity and photocarrier density of the type-II heterojunction (21.8× 104 S·m-1, 1.5× 1015 cm-3) are higher than those of the type-I heterojunction (11.8× 104 S·m-1, 0.8× 1015 cm-3). These results demonstrate that a type-II heterojunction is superior to a type-I heterojunction for THz wave modulation. This work highlights THz-TDS as an effective tool for studying photoconductivity and photocarrier density at the heterojunction interface. In turn, the intriguing interfacial photoconductivity effect provides a way to improve the THz wave modulation performance.
Xue-Qin Cao(曹雪芹), Yuan-Yuan Huang(黄媛媛), Ya-Yan Xi(席亚妍), Zhen Lei(雷珍), Jing Wang(王静), Hao-Nan Liu(刘昊楠), Ming-Jian Shi(史明坚), Tao-Tao Han(韩涛涛), Meng-En Zhang(张蒙恩), and Xin-Long Xu(徐新龙) Interfacial photoconductivity effect of type-I and type-II Sb2Se3/Si heterojunctions for THz wave modulation 2023 Chin. Phys. B 32 116701
[1] Du W Y, Huang Y Y, Zhou Y X and Xu X L 2022 J. Phys. D:Appl. Phys.55 223002 [2] Huang Y, Yao Z, He C, Zhu L, Zhang L, Bai J and Xu X 2019 J. Phys.:Condens. Matter31 153001 [3] Zhong Y, Cai T, Low T, Chen H and Lin X 2022 Phys. Rev. B106 035304 [4] Leng N, Ma L and Bai M 2022 Opt. Express30 44095 [5] Cong X, Zheng Y, Huang F, You Q, Tang J, Fang F, Jiang K, Han C and Shi Y 2022 Nano Res.15 8442 [6] Wang C, Ni H, Dai J, Liu T, Wu Z, Chen X, Dong Z, Qian J and Wu Z 2022 Chem. Phys. Lett.803 139815 [7] Gasparotto A, Maccato C, Sada C, Carraro G, Kondarides D I, Bebelis S, Petala A, La Porta A, Altantzis T and Barreca D 2019 Adv. Sustainable Syst.3 1900046 [8] Luo M, Song J, Wang J, Pan X, Hong H and Nötzel R 2022 AIP Advances12 115112 [9] Yan D, Xu D, Li J, Wang Y, Liang F, Wang J, Yan C, Liu H, Shi J, Tang L, He Y, Zhong K, Lin Z, Zhang Y, Cheng H, Shi W, Yao J and Wu Y 2018 Opt. Mater.78 484 [10] Guo H C, Zhang X H, Liu W, Yong A M and Tang S H 2009 J. Appl. Phys.106 063104 [11] Ulbricht R, Hendry E, Shan J, Heinz T F and Bonn M 2011 Rev. Mod. Phys.83 543 [12] Yue J, Ling F and Yao J 2020 Opt. Mater. Express10 2919 [13] Jakhar A, Kumar P, Husain S, Dhyani V and Das S 2020 ACS Appl. Nano Mater.3 10767 [14] Mamta, Singh Y, Maurya K K and Singh V N 2022 Materials Today Sustainability18 100148 [15] Ghosh S, Moreira M V B, Fantini C and González J C 2020 Sol. Energy211 613 [16] Han T, Luo M, Liu Y, Lu C, Ge Y, Xue X, Dong W, Huang Y, Zhou Y and Xu X 2022 J. Colloid Interface Sci.628 886 [17] Basak A and Singh U P 2021 Sol. Energy Mater. Sol. Cells230 111184 [18] Hobson T D C, Phillips L J, Hutter O S, Shiel H, Swallow J E N, Savory C N, Nayak P K, Mariotti S, Das B, Bowen L, Jones L A H, Featherstone T J, Smiles M J, Farnworth M A, Zoppi G, Thakur P K, Lee T-L, Snaith H J, Leighton C, Scanlon D O, Dhanak V R, Durose K, Veal T D and Major J D 2020 Chem. Mater.32 2621 [19] Choi D, Jang Y, Lee J, Jeong G H, Whang D, Hwang S W, Cho K S and Kim S W 2014 Sci. Rep.4 6714 [20] Liu H, Luo G, Cheng H, Yang Z, Xie Z, Zhang K H L and Yang Y 2022 J. Phys. Chem. Lett.13 4988 [21] Ren D, Chen S, Cathelinaud M, Liang G, Ma H and Zhang X 2020 ACS Appl. Mater. Interfaces12 30572 [22] Cheng C H, Li M, Song H Q, Li W H, Leng J, Tian W, Cui R, Zhao C, Jin S, Liu W and Cong S 2021 ACS Appl. Energ. Mater.4 5079 [23] Wang K, Chen C, Liao H, Wang S, Tang J, Beard M C and Yang Y 2019 J. Phys. Chem. Lett.10 4881 [24] Yu L, Wang B, Han H, Dai C, Liu W and Wang Y 2022 J. Lumin.244 118704 [25] Li G, Li Z, Chen J, Chen X, Qiao S, Wang S, Xu Y and Mai Y 2018 J. Alloys Compd.737 67 [26] Jakhar A, Kumar P, Husain S, Dhyani V, Chouksey A, Rai P K, Rawat J S and Das S 2021 Nano Express2 040004 [27] Zheng W, Fan F, Chen M, Chen S and Chang S J 2016 AIP Advances6 075105 [28] Chen S, Fan F, Miao Y, He X, Zhang K and Chang S 2016 Nanoscale8 4713 [29] Grad L, von Rohr F, Zhao J, Hengsberger M and Osterwalder J 2020 Phys. Rev. Mater.4 105404 [30] Du W Y, Yao Z H, Zhu L P, Huang Y Y, Lei Z, Xi F G, Jin Y P and Xu X L 2020 Appl. Phys. Lett.117 081106 [31] Zhang X C and Auston D H 1992 J. Appl. Phys.71 326 [32] Moez A A and Ali A I 2021 Journal of Materials Science:Materials in Electronics32 1303 [33] Tang R, Zhou S, Zhang Z, Zheng R and Huang J 2021 Adv. Mater.33 2005389 [34] Jakhar A, Kumar P, Moudgil A, Dhyani V and Das S 2020 Adv. Opt. Mater.8 1901714 [35] Benjamin S L, de Groot C H, Hector A L, Huang R, Koukharenko E, Levason W and Reid G 2015 J. Mater. Chem. C3 423 [36] Zeng Y, Wang J, Yang X, Yao J, Li P, He Q, Xu M and Miao X 2023 Opt. Mater.136 113447 [37] Yao Z, Huang Y, Du W, He C, Zhu L, Zhang L and Xu X 2020 IEEE Trans. Terahertz Sci. Technol.10 101 [38] Kosyachenko L A, Grushko E V and Mikityuk T I 2012 Semiconductors46 466 [39] Nienhuys H K and Sundström V 2005 Appl. Phys. Lett.87 012101 [40] Yan J Y 2017 J. Phys.:Condens. Matter29 415302 [41] Fan Z, Geng Z, Lv X, Su Y, Yang Y, Liu J and Chen H 2017 Sci. Rep.7 14828
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