Fused Benzothiadiazole : A Building Block for n-Type Organic Acceptor to Achieve High-Performance Organic Solar Cells
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Article number | 1807577 |
Journal / Publication | Advanced Materials |
Volume | 31 |
Issue number | 17 |
Publication status | Published - 25 Apr 2019 |
Externally published | Yes |
Link(s)
Abstract
Narrow bandgap n-type organic semiconductors (n-OS) have attracted great attention in recent years as acceptors in organic solar cells (OSCs), due to their easily tuned absorption and electronic energy levels in comparison with fullerene acceptors. Herein, a new n-OS acceptor, Y5, with an electron-deficient-core-based fused structure is designed and synthesized, which exhibits a strong absorption in the 600–900 nm region with an extinction coefficient of 1.24 × 10 5 cm −1 , and an electron mobility of 2.11 × 10 −4 cm 2 V −1 s −1 . By blending Y5 with three types of common medium-bandgap polymers (J61, PBDB-T, and TTFQx-T1) as donors, all devices exhibit high short-circuit current densities over 20 mA cm −2 . As a result, the power conversion efficiency of the Y5-based OSCs with J61, TTFQx-T1, and PBDB-T reaches 11.0%, 13.1%, and 14.1%, respectively. This indicates that Y5 is a universal and highly efficient n-OS acceptor for applications in organic solar cells.
Research Area(s)
- electron-deficient core, fused benzothiadiazole, nonfullerene acceptors, organic photovoltaics, power conversion efficiency
Bibliographic Note
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Citation Format(s)
Fused Benzothiadiazole: A Building Block for n-Type Organic Acceptor to Achieve High-Performance Organic Solar Cells. / Yuan, Jun; Zhang, Yunqiang; Zhou, Liuyang et al.
In: Advanced Materials, Vol. 31, No. 17, 1807577, 25.04.2019.
In: Advanced Materials, Vol. 31, No. 17, 1807577, 25.04.2019.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review