Polysilazane-containing coatings for increasing the conversion efficiency of encapsulated solar cells

US8563129B2 · kind B2 · utility

Assignee

• AZ Electronic Materials (Luxembourg) S.A.R.L. · LU

Inventors

• Klaus Rode · Treuchtlingen, DE
• Hartmut Wiezer · Gersthofen, DE
• Sandra Stojanovic · Gersthofen, DE
• Hubert Liebe · Wiesbaden, DE
• Lars Blankenburg · Kahla, DE

Key dates

• Filing date: Apr 17, 2009
• Grant date: Oct 22, 2013
• Expiry date: Apr 14, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31667
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates polysilazane-containing coatings for increasing the light permeability of sun-facing covers of solar cells. The coating for surfaces contains at least one polysilazane of formula (1) —(SiRR′R″—NR′″1)n- (1), wherein R′, R″, R′″ are the same or different or represent an optionally substituted alkyl, aryl, vinyl or (trialkoxysilyl)alkyl group, n being an integer and n being chosen in such a manner that the perhydropolysilazane has a number average molecular weight of 150 to 150,000 g/mol, a solvent and a catalyst. The cured coating has a thickness of at least 0.50-10 micrometer, preferably 0.2 to 5 micrometer, especially preferred 0.5 to 1.5 micrometer. It is especially suitable as transmission-promoting coating for use in sun-facing covers of solar cells.