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Donor-acceptor-type Copolymers Based on a naphtho[1,2-c:5,6-c]bis(1,2,5-thiadiazole) Scaffold for High-Efficiency Polymer Solar Cells

Donor-acceptor-type Copolymers Based on a naphtho[1,2-c:5,6-c]bis(1,2,5-thiadiazole) Scaffold for High-Efficiency Polymer Solar Cells

Li-Qian Liu, Gui-Chuan Zhang, Peng Liu, Jie Zhang, Sheng Dong, Ming Wang, Yu-Guang Ma, Hin-Lap Yip, Fei Huang

Chem Asian J. 2014 Aug;9(8):2104-12.

PMID: 24737596

Abstract:

Four donor-acceptor-type low-bandgap conjugated polymers based on a naphtho[1,2-c:5,6-c]bis(1,2,5-thiadiazole) (NT) acceptor and different donors bridged by a bithiophene spacer have been synthesized through Suzuki or Stille polymerization reactions. Fluorene (F), carbazole (Cz), alkylidene fluorene (AF), and benzodithiophene (BDT) were selected as the donor units to produce a series of new conjugated polymers. Owing to the different electron-donating ability of the donor units, the energy levels, absorption spectra, bandgaps, and carrier mobilities of the resulting polymers were systematically tuned. Bulk-heterojunction-type polymer solar cells based on the new polymers and [6,6]-phenyl-C61 -butyric acid methyl ester (PC61 BM) or [6,6]-phenyl-C71 -butyric acid methyl ester (PC71 BM) were investigated and all of the devices exhibited good photovoltaic performance, with power-conversion efficiencies (PCEs) over 3 %. The best device performance was achieved by PF-C12NT, with an open-circuit voltage (Voc ) of 0.87 V, a short-circuit current density (Jsc ) of 12.19 mA cm(-2) , a fill factor (FF) of 61.36 %, and a PCE of 6.51 % under simulated sunlight (100 mW cm(-2) , AM 1.5G).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP133546471	Naphtho[1,2-c:5,6-c′]bis[1,2,5]thiadiazole		133546-47-1	Price

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