气候变化领域集成服务门户(CCPortal): Rationally Controlled Synthesis of CdSexTe1-x Alloy Nanocrystals and Their Application in Efficient Graded Bandgap Solar Cells

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DOI	10.3390/nano7110380
	Rationally Controlled Synthesis of CdSexTe1-x Alloy Nanocrystals and Their Application in Efficient Graded Bandgap Solar Cells
	Wen, Shiya; Li, Miaozi; Yang, Junyu; Mei, Xianglin; Wu, Bin; Liu, Xiaolin; Heng, Jingxuan; Qin, Donghuan; Hou, Lintao; Xu, Wei; Wang, Dan
发表日期	2017
ISSN	2079-4991
卷号	7 期号:11
英文摘要	CdSexTe1-x semiconductor nanocrystals (NCs), being rod-shaped/irregular dot-shaped in morphology, have been fabricated via a simple hot-injection method. The NCs composition is well controlled through varying molar ratios of Se to Te precursors. Through changing the composition of the CdSexTe1-x NCs, the spectral absorption of the NC thin film between 570-800 nm is proved to be tunable. It is shown that the bandgap of homogeneously alloyed CdSexTe1-x active thin film is nonlinearly correlated with the different compositions, which is perceived as optical bowing. The solar cell devices based on CdSexTe1-x NCs with the structure of ITO/ZnO/CdSe/CdSexTe1-x/MoOx/Au and the graded bandgap ITO/ZnO/CdSe(w/o)/CdSexTe1-x/CdTe/MoOx/Au are systematically evaluated. It was found that the performance of solar cells degrades almost linearly with the increase of alloy NC film thickness with respect to ITO/ZnO/CdSe/CdSe0.2Te0.8/MoOx/Au. From another perspective, in terms of the graded bandgap structure of ITO/ZnO/CdSe/CdSexTe1-x/CdTe/MoOx/Au, the performance is improved in contrast with its single-junction analogues. The graded bandgap structure is proved to be efficient when absorbing spectrum and the solar cells fabricated under the structure of ITO/ZnO/CdSe0.8Te0.2/CdSe0.2Te0.8/CdTe/MoOx/Au indicate power conversion efficiency (PCE) of 6.37%, a value among the highest for solution-processed inversely-structured CdSexTe1-x NC solar cells. As the NC solar cells are solution-processed under environmental conditions, they are promising for fabricating solar cells at low cost, roll by roll and in large area.
英文关键词	nanocrystal; solar cells; CdTe; graded bandgap
WOS研究方向	Science & Technology - Other Topics ; Materials Science
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
来源期刊	NANOMATERIALS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158534
作者单位	Qin, DH (corresponding author), South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China.; Hou, LT (corresponding author), Jinan Univ, Guangzhou Key Lab Vacuum Coating Technol & New En, Guangdong Prov Key Lab Opt Fiber Sensing & Comm, Siyuan Lab,Dept Phys, Guangzhou 510632, Guangdong, Peoples R China.; Qin, DH (corresponding author), South China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China.
推荐引用方式 GB/T 7714	Wen, Shiya,Li, Miaozi,Yang, Junyu,et al. Rationally Controlled Synthesis of CdSexTe1-x Alloy Nanocrystals and Their Application in Efficient Graded Bandgap Solar Cells[J],2017,7(11).
APA	Wen, Shiya.,Li, Miaozi.,Yang, Junyu.,Mei, Xianglin.,Wu, Bin.,...&Wang, Dan.(2017).Rationally Controlled Synthesis of CdSexTe1-x Alloy Nanocrystals and Their Application in Efficient Graded Bandgap Solar Cells.NANOMATERIALS,7(11).
MLA	Wen, Shiya,et al."Rationally Controlled Synthesis of CdSexTe1-x Alloy Nanocrystals and Their Application in Efficient Graded Bandgap Solar Cells".NANOMATERIALS 7.11(2017).