A new world record has been set for solar cell efficiency, with reports citing different efficiency rates, including 34.6%, 34.85%, and 35.5%. The record-breaking solar cell is a tandem type, combining crystalline silicon with perovskite, although one report mentions a different type of tandem cell, using CIGS and perovskite, with a lower efficiency rate of 24.6%. The exact details of the record-breaking achievement are unclear due to the varying reports.