Over the past decade, considerable progress has been made in the development of organic materials for photovoltaic applications. Bulk heterojunction (BHJ) using n-type and a p-type semiconductor materials in the active layer is the most widely adopted device architecture to ensure maximum internal donor–acceptor (D–A) interfacial area for efficient charge separation. The most critical challenge...

Recently in Joule, Qin and co-workers determined the glass transition temperatures (Tg) of Y6 its six close variations to infer relative stabilities established a structure-Tg framework. They further proposed key guidelines stabilize microstructure performance both binary ternary solar cells. Main textSince first report Y6,1Yuan J. Zhang Y. Zhou L. G. Yip H.-L. Lau T.-K. Lu X. Zhu C. Peng H. Jo...

High specific power or to mass ratio is a critical concern of photovoltaic (PV) for aerospace applications. Organic solar cells (OSCs) have advantages such as high absorption coefficient, compatibility with flexible substrate, light-weight, etc. Moreover, recently OSCs achieved conversion efficiency (PCE) over 20% the incorporation non-fullerene based small molecule acceptor and believed be obt...

•NTI is synthesized for a new family of polymer donors•The strategy introducing thiophene can significantly enhance the PCE NTI-polymer•PNTB-2T-based binary and ternary devices exhibit efficiencies 16.72% 17.35% With emergence highly efficient non-fullerene electron acceptors, there was demand to develop donors match these narrow band-gap molecules. Designing novel electron-deficient monomers t...