Efficient polymer solar cells based on dialkoxynaphthalene and benzo[c][1,2,5]thiadiazole: A new approach for simple donor–acceptor pair

Development of naphthalene and quinoxaline‐based donor–acceptor conjugated copolymers for delivering high open‐circuit voltage in photovoltaic devices

“…The polymers have similar mobilities because the polymer backbones contain the same naphthalene and Qx units. These mobility values are similar to other quinoxaline containing polymers, APFOs (2–6 × 10 −5 cm 2 /(V s), which were reported by Andersson group 37…”

“…However, despite its promises as a new electron donor material, we found that there has been very few report so far its uses in D‐A conjugated polymers for solar cell applications. Recently, Kwon and coworkers synthesized the conjugated polymers, poly(5′,5″‐bithiophene‐ alt ‐2,6‐[(1,5‐didecyloxy)naphthalene]) (PBDN) and poly(4‐(5‐(1,5‐bis(decyloxy)‐naphthalen‐2‐yl)thiophen‐2‐yl)‐7‐(thiophen‐2‐yl)benzo[c][1,2,5]thiadiazole) (PDNTBT), from didecyloxy naphthalene, bithiophene and didecyloxy naphthalene, a 4,7‐dithien‐2‐yl‐2,1,3‐benzothiadiazole unit 37–38. Photovoltaic performances of 1.3% (PBDN) and 4.12% (PDNTBT) were observed with a high V oc of 0.83 V 37–38.…”

“…Recently, Kwon and coworkers synthesized the conjugated polymers, poly(5′,5″‐bithiophene‐ alt ‐2,6‐[(1,5‐didecyloxy)naphthalene]) (PBDN) and poly(4‐(5‐(1,5‐bis(decyloxy)‐naphthalen‐2‐yl)thiophen‐2‐yl)‐7‐(thiophen‐2‐yl)benzo[c][1,2,5]thiadiazole) (PDNTBT), from didecyloxy naphthalene, bithiophene and didecyloxy naphthalene, a 4,7‐dithien‐2‐yl‐2,1,3‐benzothiadiazole unit 37–38. Photovoltaic performances of 1.3% (PBDN) and 4.12% (PDNTBT) were observed with a high V oc of 0.83 V 37–38. Alternatively, polymers containing quinoxaline (Qx) as an electron‐deficient moiety were successfully developed and exhibited promising photovoltaic performance due to that very high electron‐affinity N ‐heterocycle of Qx can effectively tune the energy level and reduce the band gap of the resulting copolymers 39–42…”

Organic Photovoltaics: Technologies and Manufacturing

“…The effect of morphology can be described by the formation of an effective network between donor and acceptor which creates effective routes for separated charge transport. The phase separation in P3HT/PCBM systems has been well studied in several solvent systems (Baek et al, 2009;Berson et al, 2007;Jang et al, 2009;Janssen et al, 2007;Kawano et al, 2009;Kim et al, 2011;He et al, 2011). The properties of the solvents, such as boiling point, vapor pressure, solubility and surface tension have a considerable impact on the final morphology of the photoactive layer.…”

Novel alkoxyanthracene donor and benzothiadiazole acceptor for organic thin film transistor and bulk heterojunction organic photovoltaic cells

“…Among the reported materials, the copolymers composed with dialkoxynaphthalene and thiophene benzothiadiazole thiophene achieved a PCE of 4.15% …”