Document Type
Article
Publication Date
3-22-2021
Publication Title
RSC Advances
Volume
11
Issue
21
First page number:
12687
Last page number:
12695
Abstract
Sulfur/selenium grading is a widely used optimization strategy in kesterite thin-film solar cells to obtain a bandgap-graded absorber material and to optimize optical and electrical properties of the solar-cell device. In this work, we present a novel approach to introduce a [S]/([S] + [Se]) grading for Cu ZnSn(S,Se) solar cells. In contrast to commonly used methods with slow process dynamics, the presented approach aims to create a fast sulfurization reaction on the surface of pure selenide kesterite absorbers by using highly reactive H S gas and high sulfurization temperatures in a rapid flash-type process. With a combination of X-ray photoelectron spectroscopy, X-ray emission spectroscopy, Raman spectroscopy, and Raman-shallow angle cross sections spectroscopy, we gain depth-varied information on the [S]/([S] + [Se]) ratio and discuss the impact of different process parameter variations on the material and device properties. The results demonstrate the potential of the developed process to generate a steep gradient of sulfur that is confined mainly to the surface region of the absorber film. 2 4 2
Disciplines
Chemistry
File Format
File Size
1222 KB
Language
English
Creative Commons License
This work is licensed under a Creative Commons Attribution-No Derivative Works 3.0 License.
Repository Citation
Taskesen, T.,
Pareek, D.,
Hauschild, D.,
Haertel, A.,
Weinhardt, L.,
Yang, W.,
Pfeiffelmann, T.,
Nowak, D.,
Heske, C.,
Gütay, L.
(2021).
Steep Sulfur Gradient in CZTSSe Solar Cells by H2S-Assisted Rapid Surface Sulfurization.
RSC Advances, 11(21),
12687-12695.
http://dx.doi.org/10.1039/d1ra00494h