High-efficiency non-fullerene organic solar cells with perylene-diimide as acceptor material

International Conference and Exhibition on Polymer Chemistry

November 14-16, 2016 Atlanta, USA

Chuanlang Zhan

Chinese Academy of Sciences, China

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

A non-fullerene solar cell (NF-SC) employs n-type organic semiconductor (small molecule or polymeric) as the non-fullerene acceptor (A), which is used to replace the fullerene one in organic solar cells. The non-fullerene acceptor is normally blended with polymer or small molecule donor (D), forming so-called bulk-heterojunction (BHJ) structure. The resulted BHJ blend acts as the photoactive layer to harvest the solar energy. In recent two years, the power conversion efficiency (PCE) of a state-of-theart NF-SC has been fast raised, going from 4% to over 8%. The achievement of a PCE value up than 6% means that the NF-SC is potential to compete with the fullerene based counterparts. We have synthesized a series of perylene diimide acceptors with twisted conformations. The twisted conformation reduces the aggregation tendency, leading to formation of nanoscale aggregates when blended with an electron-donor material, which is expected to promote the charge dissociation that takes place at the donor-acceptor interfaces. We have achieved a power conversion efficiency of 4.03% in 2013 with the thienyl-bridged perylene diimide dimer as the non-fullerene acceptor. We then applied this concept to design and synthesize naphthalene diimide derivatives. In this talk, I will show the attendees these advances.

Biography :

Email: clzhan@iccas.ac.cn