An Intermediate Band Material K2CdSnSe4 and Its Visible-Light   Photocatalytic Activity

doi:10.1002/slct.201700731

CORC > 北京大学 > 化学与分子工程学院

	An Intermediate Band Material K2CdSnSe4 and Its Visible-Light Photocatalytic Activity
	Sun, Baohua ; He, Jianqiao ; Song, Changsheng ; Wang, Dong ; Bu, Kejun ; Yin, Guoheng ; Zhang, Xian ; Huang, Fuqiang
刊名	CHEMISTRYSELECT
	2017
关键词	intermediate band photocatalyst quaternary compound semiconductor ZNS QUANTUM DOTS CRYSTAL-STRUCTURE ELECTRONIC-STRUCTURE EMITTING-DIODES SOLAR-CELLS CDSE CDTE NANOCRYSTALS SN PHOTOLUMINESCENCE
DOI	10.1002/slct.201700731
英文摘要	Intermediate bands (IBs) can significantly extend the absorption range of solar absorbers. Here, an intermediate band material K2CdSnSe4 was synthesized via a urea flux method at 220 degrees C. The structure features [CdSnSe4](2-) One-dimensional chains, which were built up by [CdSe4](6-) and [SnSe4](4-) tetrahedra via edge sharing. Optical measurements indicate that the as-synthesized K2CdSnSe4 compound has typical multi-absorption characters with an absorption edge at 1.63 eV and an absorption peak around 398 nm (3.1 eV). First-principles calcu-lation results, which are perfectly consistent with the experimental results, show that the intermediate bands mainly consist of Sn-5 s and Se-4p orbitals. Photoresponse was observed under visible light illumination with a photocurrent density of 217 mu A.cm(-2) at 1 V. Methyl orange (MO) was used as model pollutant for photodegradation test. About 99% of MO (10 mg.L-1) was removed after 4 h under visible light illumination using K2CdSnSe4 powder (1 g.L-1) as photocatalyst, which is better than that of C3N4 (similar to 45% at 240 min).; National Key Research and Development Program [2016YFB0901600]; NSF of China [61376056, 11404358]; Science and Technology Commission of Shanghai [16JC1401700, 14520722000]; SCI(E); ARTICLE; 20; 5655-5659; 2
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472180]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Sun, Baohua,He, Jianqiao,Song, Changsheng,et al. An Intermediate Band Material K2CdSnSe4 and Its Visible-Light Photocatalytic Activity[J]. CHEMISTRYSELECT,2017.
APA	Sun, Baohua.,He, Jianqiao.,Song, Changsheng.,Wang, Dong.,Bu, Kejun.,...&Huang, Fuqiang.(2017).An Intermediate Band Material K2CdSnSe4 and Its Visible-Light Photocatalytic Activity.CHEMISTRYSELECT.
MLA	Sun, Baohua,et al."An Intermediate Band Material K2CdSnSe4 and Its Visible-Light Photocatalytic Activity".CHEMISTRYSELECT (2017).