Novel porous silicon backside light reflector for thin silicon solar cells

✍ Scribed by J. Zettner; M. Thoenissen; Th. Hierl; R. Brendel; M. Schulz

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 193 KB
• Volume: 6
• Category: Article
• ISSN: 1062-7995
• DOI: 10.1002/(sici)1099-159x(199811/12)6:6<423::aid-pip233>3.0.co;2-v

✦ Synopsis

High eciencies of thin crystalline Si solar cells grown on highly doped substrates have been reported. We propose porous Si layers located near the interface of the active layer and the substrate to introduce an optical con®nement into these cells. We report on the experimental proof of the principle for this novel type of back-surface re¯ector. Spectral re¯ectance measurements agree well with computer simulations. On the basis of this agreement, we calculate the enhancement of short-circuit current densities due to porous re¯ectors for textured and non-textured cells. These simulations are of particular relevance for multicrystalline Si cells on foreign substrates and for space cells.