However, Panasonic says the latest achievement is also an improvement over the previous record of 25 percent for small area crystalline silicon-based solar cells accomplished on solar cells measuring 4 cm2 (0.6 in2). This is still short of the efficiencies seen in multi-junction solar cells and concentrator triple-junction compound solar cells that have reached conversion efficiencies of 38.8 percent and 44.4 percent, respectively.
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Panasonic classifies a "practical size" as cells with an area of over 100 cm2 (15.5 in2). The February 2013 record was achieved on a solar cell with an area of 101.8 cm2 (15.7 in2), while this new 25.6 percent efficiency was achieved on a solar cell measuring 143 cm2 (22.1 in2).
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