Sodium Assisted Sintering of Chalcogenides and Its Application to Solution Processed Cu2ZnSn(S,Se)4 Thin Film Solar Cells

被引：202

作者：

Sutter-Fella, Carolin M. ^{[1
]}

Stueckelberger, Josua A. ^{[1
]}

Hagendorfer, Harald ^{[1
]}

La Mattina, Fabio ^{[2
]}

Kranz, Lukas ^{[1
]}

Nishiwaki, Shiro ^{[1
]}

Uhl, Alexander R. ^{[1
]}

Romanyuk, Yaroslav E. ^{[1
]}

Tiwari, Ayodhya N. ^{[1
]}

机构：

[1] Empa Swiss Fed Labs Mat Sci & Technol, Lab Thin Films & Photovolta, CH-8600 Dubendorf, Switzerland

[2] Empa Swiss Fed Labs Mat Sci & Technol, Lab Elect Metrol Reliabil, CH-8600 Dubendorf, Switzerland

来源：

CHEMISTRY OF MATERIALS | 2014年 / 26卷 / 03期

关键词：

GROWTH; PRECURSORS; CUINSE2;

D O I：

10.1021/cm403504u

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cu2ZnSn(S,Se)(4) thin layers processed from solution-deposited earth-abundant precursors emerge as absorber materials for low-cost thin film solar cells. A frequently observed drawback of the chemical solution processing poor crystallinity of the chalcogenide absorber can be overcome by employing a sodium-containing reactive agent. We demonstrate a massive improvement in grain growth in the presence of sodium. It enhances the surface chemisorption of selenium molecules and can promote the formation of liquid Na2Sex phases during reactive annealing of the precursor. The sodium is also incorporated into the semiconductor absorber and significantly modifies its electronic properties. By adjusting the sodium precursor quantity, it is possible to tune doping levels and gradients to maximize the collection of photogenerated carriers in thin film Cu2ZnSn(S,Se)(4) solar cells. The presented approach can be extended to other solution-processed metal chalcogenides to enhance their structural and electronic properties, which are critical for applications such as thin film solar cells and transistors.

引用

页码：1420 / 1425

页数：6

共 35 条

[1] ENHANCED GRAIN-GROWTH IN POLYCRYSTALLINE CUINSE2 USING RAPID THERMAL-PROCESSING [J].