Bifacial Silicon Solar Cells with 21.3 percent Front Efficiency and 19.8 percent Rear Efficiency

摘要

We introduced a triode structure with p-n junctions on both sides into single-crystalline bifacial silicon solar cells in order 10 improve solar cell performance. These fabricated bifacial silicon solar cells have energy conversion efficiency of 21.3 percent under front 1 sun illumination (the standard 1 kW/m~2 AM 1.5 global spectrum al 25deg C) and 19.8 percent wider rear 1sun illumination tested at the Japan Quality Assurance Organization. The total of' the front and rear conversion efficiencies is the highest ever reported for bifacial silicon solar cells.