Rational design on D–A conjugated P(BDT–DTBT) polymers for polymer solar cells

Abstract

This review summarizes the various structural modifications and photovoltaic properties of the benzodithiophene–benzothiadiazole conjugated polymers [P(BDT–DTBT)] and their derivatives.

Syntheses and solar cell applications of conjugated copolymers containing tetrafluorophenylene units

“…After filtration by glass filter, the precipitate was purified by Soxhlet extraction with methanol and dried in vacuum for 48 h to generate PE-BDTF. The molar feed ratios of monomer 4,7-bis(5-bromo-2-thienyl)-2,1,3-benzothiadiazole (10) to tetrafluorodibromobenzene (11) were 99:1 for PE-BDTF, PO-BDTF, PE-BDTTF and PO-BDTTF and 95:5 for PE-BDTF5, PO-BDTF5, PE-BDTTF5 and PO-BDTTF5. The structures and purities of the monomers were confirmed by 1 H NMR, 13 C NMR, and HRMS.…”

“…2,6-Bis(trimethyltin)-4,8-bis(2-ethyhexyloxy)benzo[1,2-b:3,4-b 0 ]dithiophene dithiophene (4), 4,7-bis(5-bromo-2-thienyl)-2,1,3-benzothiadiazole (10) and tetrafluorodibromobenzene(11) were copolymerized through Stille coupling reaction with Pd(0)-catalyst to yield PE-BDTF and PE-BDTF5. 2,6-Bis(trimethyltin)-4,8-bis(2-octyldodecyloxy)benzo[1,2-b:3,4-b 0 ]dithiophene (5), 4,7-bis(5-bromo-2-thienyl)-2,1,3-benzothiadiazole (10) and tetrafluorodibromobenzene (11) were copolymerized through Stille coupling reaction with Pd(0)-catalyst to yield PO-BDTF and PO-BDTF5.…”

Benzodithiophene-based polymers containing novel electron accepting selenophene-incorporated pyrrolo[3,4-c]pyrrole-1,3-dione units for highly efficient thin film transistors and polymer solar cells

“…In this instance, the search for structurally new electron donor (D) and acceptor (A) materials is crucial because the PCE could be improved further to 17% and 24% for single and multijunction PSCs, respectively, by utilizing suitable D and A materials [3]. It is worth to notice that the benzodithiophene derivatives [4,5] are excellent donor materials for the preparation of highly efficient donor-acceptor polymers for PSCs along with various electron accepting units, such as benzo[c] [1,2,5] thiadiazole (BT) [6][7][8], thieono [3,4-b]thiophene (TT) [9][10][11], thiophene-based imide-functionalized thieno [3,4-c]pyrrole-4,6-dione (TPD) [12][13][14] and lactam-functionalized diketo-pyrrolo [3,4-c]pyrrole-1,4-dione (DPP) units [15][16][17]. In particular, TPDand DPP-based polymer has displayed impressive opto-electrical and photovoltaic properties [12][13][14][15][16][17].…”

Photophysical, electrochemical, and spectroelectrochemical investigation of electronicpush–pullbenzothiadiazole fluorophores

“…Benzothiadiazole (BZT) has been widely used in an array of applications [1][2][3]. This is in part due to its intrinsic electron accepting character that gives rise to interesting opto-electronic properties.…”