Vacuum-deposited interconnection layers for tandem solar cells

By Chen, Yi-Hong; Chen, Chang-Wen; Huang, Zheng-Yu; Wong, Ken-Tsung; Lin, Li-Yen; Lin, Francis & Lin, Hao-Wu
Published in Organic Electronics NULL 2014

Abstract

Two different types of vacuum-deposited interconnection layers (ICLs) were investigated for tandem solar cells: (1) a pure metal oxide and (2) an organic matrix doped with conductive dopants. The optical and electrical properties of these ICLs were systematically studied and compared. Taking the characteristics of ICLs into consideration, optical design methodology for balancing the photocurrent of each sub-cell in the tandem cell is presented. According to the design, highly efficient small-molecule tandem solar cells with power conversion efficiencies up to 7.3%–7.4% were experimentally demonstrated in both devices utilizing pure metal oxide and organic matrix ICLs.

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