气候变化领域集成服务门户(CCPortal): Surface passivation via acid vapor etching enables efficient and stable solution-processed CdTe nanocrystal solar cells

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DOI	10.1039/c9se00902g
	Surface passivation via acid vapor etching enables efficient and stable solution-processed CdTe nanocrystal solar cells
	Guo, Xiuzhen; Rong, Zhitao; Wang, Le; Liu, Songwei; Liu, Zhe; Luo, Kaiying; Chen, Bingchang; Qin, Donghuan; Ma, Yuguang; Wu, Hongbin; Hou, Lintao
发表日期	2020
ISSN	2398-4902
起始页码	399
结束页码	406
卷号	4 期号:1
英文摘要	Achieving stable and low-resistance interfaces for hole transport layers with well-matched energy levels is crucial to maximize the performance of solution-processed CdTe nanocrystal (NC) based solar cells. Wet chemical etching with substrates immersed in dilute acid solutions is commonly adopted to modify traditional thick vacuum-evaporated CdTe layers for forming a conductive layer with good ohmic contact with the metal electrode. However, for next-generation low-cost solution-processed CdTe NC based solar cells, this method has failed so far since the acid (Br-2/CH3OH or HNO3/H3PO4) can permeate easily into the grain boundaries of CdTe NCs and form a device shunt. Herein, a new technology called acid vapor etching (AVE) is developed for the first time for solution-processed CdTe NC solar cells. It's found that surface passivation can be well controlled during a mild bromine-methanol (BM) vapor etching process. Besides BM, other acid solutions such as a nitric-acetic (NA) acid solution are also suitable to adjust the CdTe interface, illustrating the remarkable universality of this method. The AVE-processed devices with an inverted configuration of ITO/ZnO/CdSe/CdTe/Au show very high efficiencies of 8.38% (BM) and 8.67% (NA) due to significant enhancement in short-circuit current, which are increased by similar to 30% over that of a conventional device (5.83%) without AVE. Moreover, the AVE-processed CdTe NC solar cells show a striking improvement in stability, indicating their potential application in the manufacture of large-area solution-processed CdTe solar cells.
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
来源期刊	SUSTAINABLE ENERGY & FUELS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158834
作者单位	Qin, DH (corresponding author), South China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Peoples R China.; Hou, LT (corresponding author), Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou Key Lab Vacuum Coating Technol & New En, Dept Phys,Siyuan Lab, Guangzhou 510632, Guangdong, Peoples R China.; Qin, DH (corresponding author), South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China.
推荐引用方式 GB/T 7714	Guo, Xiuzhen,Rong, Zhitao,Wang, Le,et al. Surface passivation via acid vapor etching enables efficient and stable solution-processed CdTe nanocrystal solar cells[J],2020,4(1).
APA	Guo, Xiuzhen.,Rong, Zhitao.,Wang, Le.,Liu, Songwei.,Liu, Zhe.,...&Hou, Lintao.(2020).Surface passivation via acid vapor etching enables efficient and stable solution-processed CdTe nanocrystal solar cells.SUSTAINABLE ENERGY & FUELS,4(1).
MLA	Guo, Xiuzhen,et al."Surface passivation via acid vapor etching enables efficient and stable solution-processed CdTe nanocrystal solar cells".SUSTAINABLE ENERGY & FUELS 4.1(2020).