Double-cable conjugated polymers with near-infrared (NIR) electron acceptors are synthesized for use in single-component organic solar cells (SCOSCs). Through the development of a judicious synthetic pathway, the highly sensitive nature of the 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (IC)-based electron acceptors in basic and protonic solvents is overcome. In addition, an asymmetric design motif is adopted to optimize the packing of donor and acceptor segments, enhancing charge separation efficiency. As such, the new double-cable polymers are successfully applied in SCOSCs, providing an efficiency of over 10 % with a broad photo response from 300 to 850 nm and exhibiting excellent thermal/light stability. These results demonstrate the powerful design of NIR-acceptor-based double-cable polymers and will enable SCOSCs to enter a new stage.

Azulene is ap romising candidate for constructing optoelectronic materials.A ne ffective strategy is presented to obtain high-performance conjugated polymers by incorporating 2,6-connected azulene units into the polymeric backbone, and two conjugated copolymers P(TBAzDI-TPD) and P(TBAzDI-TFB) were designed and synthesized based on this strategy.They are the first two examples for 2,6-connected azulene-based conjugated polymers and exhibit unipolar ntype transistor performance with an electron mobility of up to 0.42 cm 2 V À1 s À1 ,w hich is among the highest values for n-type polymeric semiconductors in bottom-gate top-contact organic field-effect transistors.P reliminary all-polymer solar cell devices with P(TBAzDI-TPD) as the electron acceptor and PTB7-Th as the electron donor displayapower conversion efficiency of 1.82 %.

of low cost, lightweight, flexibility, and semitransparency. With the development of new materials and the resulting underlying device physics, state-of-theart devices have achieved power conversion efficiencies (PCEs) exceeding 19% in single-junction OSCs based on nonfullerene acceptors. [1][2][3][4][5][6][7][8][9][10] Among highperformance OSCs, the combination of narrow bandgap fused-ring electron acceptors (FREAs) with a medium-bandgap polymer donor has become a popular approach for simultaneously realizing high photovoltaic parameters, including short-circuit current density (J sc ), fill factor (FF), and open-circuit voltage (V oc ). [11][12][13][14] In 2017, Bo et al. first reported the nonfused ring acceptor (NFERA), also called supramolecular fused ring acceptor, whose planar conformation can be locked by intramolecular noncovalent, and they achieved a decent PCE of 9.6%. [15] During the past several years, the NFREAs have attracted more and more attention as a potential alternative material to FREAs due to their easy synthesis, low synthesis complexity, low cost, and diverse molecular structures. [16][17][18][19][20][21][22] Although the development of NFREAs still falls behind that of FREAs, some NFREAs can achieve PCEs above

Development of high-performance organic thermoelectric (TE) materials is of vital importance for flexible power generation and solid-cooling applications.D emonstrated here is the significant enhancement in TE performance of seleniumsubstituted diketopyrrolopyrrole (DPP) derivatives.A long with strong intermolecular interactions and high Hall mobilities of 1.0-2.3 cm 2 V À1 s À1 in doping-states for polymers, PDPPSe-12 exhibits am aximum power factor and ZT of up to 364 mWm À1 K À2 and 0.25, respectively.T he performance is more than twice that of the sulfur-based DPP derivative and represents the highest value for p-type organic thermoelectric materials based on high-mobility polymers.T hese results reveal that selenium substitution can serve as ap owerful strategy towards rationally designed thermoelectric polymers with state-of-the-art performances.