Two-step vapor deposition of self-catalyzed large-size PbI2 nanobelts for high-performance photodetectors

doi:10.1039/c8tc01180j

	Two-step vapor deposition of self-catalyzed large-size PbI2 nanobelts for high-performance photodetectors
	Han, Mingming 1,2; Sun, Jiamin 1,2,3; Bian, Luozhen 1,2,3; Wang, Zhou 4; Zhang, Lei 5; Yin, Yanxue 1,2; Gao, Zhaofeng 1,2; Li, Fulin 1,2; Xin, Qian 1,2; He, Longbin 5
刊名	JOURNAL OF MATERIALS CHEMISTRY C
	2018-06-07
卷号	6 期号:21 页码:5746-5753
ISSN号	2050-7526
DOI	10.1039/c8tc01180j
英文摘要	The grown lead iodide (PbI2) is usually a two-dimensional sheet with a finite size which necessitates sophisticated device metallization and the growth of quasi one-dimensional materials is still challenging. In this work, large-size (length 4 100 mm), single-crystalline and high-density PbI2 nanobelts are successfully synthesized by manipulating the microenvironment in a two-step vapor deposition process at a slow heating rate of B18 1C min 1. Firstly, PbI2 nanosheet seeds are grown by physical vapor deposition, and then PbI2 nanobelts are synthesized by a self-catalyzed vapor-liquid-solid growth mechanism, which is verified by the Pb nanoparticles on the nanobelt tips. Photoluminescence and ultraviolet-visible spectra show the uniform high-quality crystallinity of the as-prepared large-size PbI2 nanobelts with a bandgap of 2.36 eV. When configured into photodetectors with a shadow mask, the fabricated device exhibits a low dark current of 4 pA, an impressive ON/ OFF current ratio of 103-104, a photoresponsivity of 13 mA W 1, and a fast response with the rise and decay time constants of 425 and 41 ms, respectively. All these performances are comparable to those of state-of-the-art layered PbI2 nanostructure photodetectors, but the ease of synthesizing large-size PbI2 nanobelts may have a useful impact on next-generation easily-fabricated high-performance optoelectronics.
资助项目	National Key R&D Program of China[2017YFA0305500] ; Shandong Provincial Natural Science Foundation, China[ZR2017MF037] ; Science Technology and Innovation Committee of Shenzhen Municipality[JCYJ20170307093131123] ; "Qilu young scholar'' program of Shandong University ; National Natural Science Foundation of China[51602314] ; National Natural Science Foundation of China[61504151] ; CAS-CSIRO project of the Bureau of International Co-operation of the Chinese Academy of Sciences[122111KYSB20150064]
WOS关键词	TRANSITION-METAL DICHALCOGENIDES ; FIELD-EFFECT-TRANSISTORS ; SINGLE-CRYSTALS ; FLEXIBLE PHOTODETECTORS ; 2-DIMENSIONAL MATERIALS ; LEAD IODIDE ; GRAPHENE ; PEROVSKITES ; NANOWIRES ; GROWTH
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000434260700021
资助机构	National Key R&D Program of China ; Shandong Provincial Natural Science Foundation, China ; Science Technology and Innovation Committee of Shenzhen Municipality ; "Qilu young scholar'' program of Shandong University ; National Natural Science Foundation of China ; CAS-CSIRO project of the Bureau of International Co-operation of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/24608]
专题	中国科学院过程工程研究所
通讯作者	Han, Ning; Yang, Zai-xing
作者单位	1.Shandong Univ, Ctr Nanoelect, Jinan 250100, Shandong, Peoples R China 2.Shandong Univ, Sch Microelect, Jinan 250100, Shandong, Peoples R China 3.Shandong Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R China 4.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 5.Southeast Univ, Collaborat Innovat Ctr Micro Nano Fabricat Device, SEU FEI Nanopico Ctr, Key Lab MEMS,Minist Educ, Nanjing 210096, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Han, Mingming,Sun, Jiamin,Bian, Luozhen,et al. Two-step vapor deposition of self-catalyzed large-size PbI2 nanobelts for high-performance photodetectors[J]. JOURNAL OF MATERIALS CHEMISTRY C,2018,6(21):5746-5753.
APA	Han, Mingming.,Sun, Jiamin.,Bian, Luozhen.,Wang, Zhou.,Zhang, Lei.,...&Yang, Zai-xing.(2018).Two-step vapor deposition of self-catalyzed large-size PbI2 nanobelts for high-performance photodetectors.JOURNAL OF MATERIALS CHEMISTRY C,6(21),5746-5753.
MLA	Han, Mingming,et al."Two-step vapor deposition of self-catalyzed large-size PbI2 nanobelts for high-performance photodetectors".JOURNAL OF MATERIALS CHEMISTRY C 6.21(2018):5746-5753.