Direct correlation of microstructure and device performance of liquid phase crystallized Si thin film solar cells on glass. Issue 9 (31st August 2016)

• Record Type: Journal Article
• Authors: Kühnapfel, Sven; Gall, Stefan; Sonntag, Paul; Schäfer, Norbert; Abou‐Ras, Daniel
• Is Part Of: Physica status solidi. Volume 10:Issue 9(2016)
• Page Start: 657
• Page End: 661
• Publication Date: 2016-08-31
• Subjects: silicon -- zone melting recrystallization -- liquid phase crystallization -- structure -- electron backscatter diffraction -- solar cells; Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.201600219
• Languages: English
• ISSNs: 1862-6254

Abstract

Abstract : Si thin films on glass grown by liquid phase crystallization (LPC) exhibit large grains resembling those in multicrystalline Si wafers. The present work gives direct insight into how planar defects in LPC‐Si thin films influence the device performance of the corresponding solar cells by acquiring electron‐backscatter diffraction maps and measuring solar cell parameters on the same identical positions. By this approach, it was possible to demonstrate how low scanning velocities of the laser line during the crystallization lead to lower densities of grain boundaries, to improved charge‐carrier diffusion lengths, and hence to improved device performances. Orientation‐distribution map acquired by electron backscatter diffraction on a Si thin film crystallized via liquid phase crystallization. Abstract : By acquiring electron backscatter diffraction maps and measuring solar cell parameters on the same identical positions, the present letter gives direct insight into how planar defects in Si thin films produced by liquid‐phase crystallization influence the device performance of the corresponding solar cells.