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Amorphous diamond-like carbon films—a hard anti-reflecting coating for silicon solar cells

1995; Elsevier BV; Volume: 256; Issue: 1-2 Linguagem: Inglês

10.1016/0040-6090(95)80024-7

1879-2731

M. Alaluf, J. Appelbaum, L. Klibanov, D.J. Brinker, David Scheiman, N. Croitoru,

Silicon and Solar Cell Technologies

Amorphous diamond-line carbon (a:DLC) films are suitable for use as a protective layer and/or anti-reflecting coating for silicon solar cells. Microhardness tests show a high hardness of about 4700 kg mm−2. Optical measurements in the visible light on a silicon solar cell without anti-reflecting coating where a:DLC was deposited as an anti-reflecting (AR) coating, show a significant reduction in the reflection of the light of about 25–45% as compared with the reflection from the solar cell before deposition of the a:DLC film. The current-voltage (I–V) characteristics of solar cells without an anti-reflecting coating and with a:DLC as the AR coating layer show an improvement in the short circuit current (from 107 mA to 116 mA) and in the efficiency of the cell by 1% (from 8% to 9%). I–V characteristics of a solar cell with AR coating and deposited a:DLC (400Åthickness) over that film as a protective coating, show a slight reduction of the short circuit current (from 168 mA to 145 mA), and the efficiency of the solar cell decreases (16% to 14%). However, the microhardness was significantly increased.