期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 50, 页码 44173-44180出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b12448
关键词
chalcopyrite; thin-film solar cells; alkali fluoride postdeposition treatment's; Kelvin probe force microscopy; surface photovoltage; photoelectron spectroscopy
资金
- European Union's Horizon research and innovation program [641004]
We report on the initial stages of CdS buffer layer formation on Cu(In,Ga)Se-2 (CIGSe) thin-film solar cell absorbers subjected to rubidium fluoride (RIDE) postdeposition treatment (PDT). A detailed characterization of the CIGSe/CdS interface for different chemical bath deposition (CBD) times of the CdS layer is obtained from spatially resolved atomic and Kelvin probe force microscopy and laterally integrating X-ray,spectroscopies. The observed spatial inhomogeneity in the interface's structural, chemical, and electronic properties of samples undergoing up to 3 min of CBD treatments is indicative of a Complex interface formation including an incomplete coverage and/or nonuniform composition of the buffer layer. It is expected that this result impacts solar cell performance, in particular when reducing the CdS layer thickness (e.g., in an attempt to increase the collection in the ultraviolet wavelength region). Our work provides important findings on the absorber/buffer interface formation and reveals the underlying mechanism for limitations in the reduction of the CdS thickness, even when an alkali PDT is applied to the CIGSe absorber.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据