Indene Addition of [6,6]-Phenyl-C₆₁-butyric Acid Methyl Ester for High-Performance Acceptor in Polymer Solar Cells

Indene addition product of [6,6]-phenyl-C61-butyric acid methyl ester (PC60BM), indene-PC60BM (IPC60BM), was synthesized by a one-pot reaction of indene and PC60BM at 180 °C for 12 h, for combining the advantages of PC60BM and indene-C60 bis-adduct in the application as acceptor in polymer solar cells (PSCs). The lowest unoccupied molecular orbital (LUMO) energy level of IPC60BM is 0.12 eV up-shifted than that of PC60BM. The PSC based on poly(3-hexylthiophene) (P3HT) as donor and IPC60BM as acceptor shows a higher Voc of 0.72 V and higher power conversion efficiency (PCE) of 4.39% under the illumination of AM1.5G, 100 mW/cm2, while the PSC based on P3HT/PC60BM displays Voc of 0.58 V and PCE of 3.49% only. The results indicate that IPC60BM is a better acceptor than PC60BM for the P3HT-based PSCs and could be a promising new acceptor instead of PC60BM for high-performance PSCs

Solution-Processable Star-Shaped Photovoltaic Organic Molecule with Triphenylamine Core and Benzothiadiazole−Thiophene Arms

Solution-Processable Star-Shaped Photovoltaic Organic Molecule with Triphenylamine Core and Benzothiadiazole−Thiophene Arm

Synthesis and Photovoltaic Properties of a Copolymer of Benzo[1,2-<i>b</i>:4,5-<i>b</i>′]dithiophene and Bithiazole

Synthesis and Photovoltaic Properties of a Copolymer of Benzo[1,2-b:4,5-b′]dithiophene and Bithiazol

Alternating Copolymers of Carbazole and Triphenylamine with Conjugated Side Chain Attaching Acceptor Groups: Synthesis and Photovoltaic Application

Four alternating copolymers of carbazole (Cz) and triphenylamine (TPA) with thienylene-vinylene (TV) conjugated side chain containing different acceptor end groups of aldehyde (PCzTPA−TVCHO), monocyano (PCzTPA−TVCN) dicyano (PCzTPA−TVDCN), and 1,3-diethyl-2-thiobarbituric acid (PCzTPA−TVDT), have been designed and synthesized. The structures and properties of the main chain donor-side chain acceptor D−A copolymers were fully characterized. Through changing the acceptor group attached to the TV conjugated side chain on TPA, the electronic properties and energy levels of the copolymers were effectively tuned. The effect of substituent on the electronic structures of the copolymers was also studied by molecular simulation. These results indicate that it is a simple and effective approach to tune the bandgap in a conjugated polymer by attaching an acceptor end group on the conjugated side chains. PCzTPA−TVCN, PCzTPA−TVDCN, and PCzTPA−TVDT were used as donor in polymer solar cells; the device based on PCzTPA−TVDT/PC70BM demonstrates a power conversion efficiency of 2.76% with Voc of 0.87 V under the illumination of AM1.5G, 100 mW/cm2