- New low band gap 2-(4-(trifluoromethyl)phenyl)-1H-benzo[d]imidazole and benzo[1,2-c;4,5-c′]bis[1,2,5]thiadiazole based conjugated polymers for organic photovoltaics
-
Two new low band gap D-A structured conjugated polymers, PBDTTBI and PBDTBBT, based on 2-(4-(trifluoromethyl)phenyl)-1H-benzo[d]imidazole and benzo[1,2-c;4,5-c′]bis[1,2,5]thiadiazole acceptor units with benzo[1,2-b;3,4-b′]dithiophene as a donor unit have been designed and synthesized via a Stille coupling reaction. The incorporation of the benzo[1,2-c;4,5-c′]bis[1,2,5]thiadiazole unit into PBDTBBT has significantly altered the optical and electrochemical properties of the polymer. The optical band gap estimated from the onset absorption edge is ~1.88 eV and ~1.1 eV, respectively for PBDTTBI and PBDTBBT. It is observed that PBDTBBT exhibited a deeper HOMO energy level (-4.06 eV) with strong intramolecular charge transfer interactions. Bulk heterojunction solar cells fabricated with a configuration of ITO/PEDOT:PSS/PBDTBBT:PC71BM/Al exhibited a best power conversion efficiency of 0.67%, with a short circuit current density of 4.9 mA cm-2, an open-circuit voltage of 0.54 V and a fill factor of 25%.
- Murali,Rao, Arun D.,Ramamurthy, Praveen C.
-
-
Read Online
- Binuclear Ruthenium Complexes with Benzo[1,2-b;4,5-b′]dithiophene Analogues as Bridge Ligands: Syntheses, Characterization and Notable Difference on Electronic Coupling
-
Diruthenium ethynyl complexes 1–3 (1: 1,5-dithia-s-indacene-4,8-dione; 2: 4,8-diethoxybenzo[1,2-b:4,5- b']dithiophene; 3: 4,8-didodecyloxybenzo[1,2-b:4,5-b']dithiophene) have been synthesized by incorporating the respective conjugated heterocyclic spacer
- Ou, Ya-Ping,Tang, Shunlin,Wang, Aihui,Li, Junhua,Zhang, Fuxing,Xu, Zhifeng
-
-
Read Online
- Novel pendent thiophene side-chained benzodithiophene for polymer solar cells
-
In this article, pendent thiophene (2-butyl-5-octylthiophene) side chain is used to modify the backbone of the polymers containing benzo[1,2-b:4,5-b′]dithiophene (BDT) and thieno[3,4-c]pyrrole-4,6-dione (TPD). Compared with the dodecyloxy side-chained pol
- Sheng, Ruiying,Liu, Qian,Xiao, Manjun,Gu, Chunyang,Hu, Tong,Ren, Junzhen,Sun, Mingliang,Yang, Renqiang
-
-
Read Online
- Low bandgap polymers with benzo [1,2-b:4,5-b′] dithiophene and bisthiophene-dioxopyrrolothiophene units for photovoltaic applications
-
New donor/acceptor polymers PBDTTPT1 and PBDTTPT2 with alternating benzodithiophene (BDT) and bisthiophene-dioxopyrrolothiophene (TPT) units were synthesized by Stille coupling reaction. The polymers had optical bandgaps of 1.78 and 1.82 eV, and HOMO energy levels of -5.30 and -5.35 eV for PBDTTPT1 and PBDTTPT2, respectively. Polymeric solar cell devices based on these copolymers as donors and PC71BM as acceptor showed the highest open circuit voltage of 0.95 V and power conversion efficiency of 2.68% under the illumination of AM 1.5, 100 mW/cm2.
- Zhang, Guobing,Fu, Yingying,Xie, Zhiyuan,Zhang, Qing
-
-
Read Online
- Benzo[1,2-b:4,5-b′]dithiophene-dioxopyrrolothiophen copolymers for high performance solar cells
-
New donor/acceptor polymers PBDTDPT1 and PBDTDPT2 with alternating benzodithiophene and N-alkylated dioxopyrrolo-thiophene were synthesized. The new polymers had deep HOMO levels of -5.42 and -5.44 eV for PBDTDPT1 and PBDTDPT2, respectively. A PBDTDPT2 based BHJ solar cell device achieved a PCE of 4.79% and Voc of 0.91 V.
- Zhang, Guobing,Fu, Yingying,Zhang, Qing,Xie, Zhiyuan
-
-
Read Online
- Hole transporting material for perovskite solar cell and application thereof
-
The invention discloses a hole transporting material 2,6-bistriphenylamine-4,8-bis(alkoxy)benzo[1,2-B:4,5-B']dithiophene for a perovskite solar cell. The hole transporting material has simple molecular structures, high hole mobility, high efficiency, high conductivity and good solubility; aromatic functional radicals can be introduced into lateral groups; the perovskite solar cell prepared from the hole transporting material can be matched with the energy level of perovskite. The invention also discloses a preparation method of the hole transporting material. The hole transporting material for the perovskite solar cell is prepared and obtained by using 2,6-dibromo-4,8-bis(alkoxy)benzo[1,2-B:4,5-B']dithiophene and 4-(Diphenylamino)phenylboronicacid as raw materials through a one-step SUZUKI reaction. The preparation method provided by the invention has the characteristics that the operation is simple, the raw materials are low-cost and easily obtained, the separation is easy, and the yield is high.
- -
-
Paragraph 0119; 0175; 0176; 0177; 0178
(2017/07/20)
-
- 2,6-bis(triphenylamine)-4,8-bis(alkoxy)benzo[1,2-b:4,5-b']bithiophene and preparation for same
-
The invention discloses a hole transport material 2,6-bis(triphenylamine)-4,8-bis(alkoxy)benzo[1,2-b:4,5-b']bithiophene for a perovskite solar cell. The hole transport material has a simple molecular structure, a lateral group to which an aromatic functional group can be introduced, high hole mobility, high efficiency, high electrical conductivity and high dissolubility, and the perovskite solar cell prepared from the hole transport material can be matched with a perovskite energy level. The invention also discloses a preparation method for the hole transport material. The hole transport material for the perovskite solar cell is prepared by an SUZUKI reaction step from raw materials 2,6-dibromo-4,8-bis(alkoxy)benzo[1,2-b:4,5-b']dithiophene and 4-(diphenylamino)phenylboronicacid. The preparation method has the characteristics of simplicity in operation, readily available raw materials, easiness for separation and high yield.
- -
-
Paragraph 0119; 0120; 0121; 0122; 0176; 0177; 0178; 0179
(2017/07/21)
-
- Linear side chains in benzo[1,2-b:4,5-b′]dithiophene-thieno[3,4-c] pyrrole-4,6-dione polymers direct self-assembly and solar cell performance
-
While varying the size and branching of solubilizing side chains in π-conjugated polymers impacts their self-assembling properties in thin-film devices, these structural changes remain difficult to anticipate. This report emphasizes the determining role that linear side-chain substituents play in poly(benzo[1,2-b:4,5-b′]dithiophene-thieno[3,4-c]pyrrole-4,6-dione) (PBDTTPD) polymers for bulk heterojunction (BHJ) solar cell applications. We show that replacing branched side chains by linear ones in the BDT motifs induces a critical change in polymer self-assembly and backbone orientation in thin films that correlates with a dramatic drop in solar cell efficiency. In contrast, we show that for polymers with branched alkyl-substituted BDT motifs, controlling the number of aliphatic carbons in the linear N-alkyl-substituted TPD motifs is a major contributor to improved material performance. With this approach, PBDTTPD polymers were found to reach power conversion efficiencies of 8.5% and open-circuit voltages of 0.97 V in BHJ devices with PC71BM, making PBDTTPD one of the best polymer donors for use in the high-band-gap cell of tandem solar cells.
- Cabanetos, Clement,El Labban, Abdulrahman,Bartelt, Jonathan A.,Douglas, Jessica D.,Mateker, William R.,Frechet, Jean M. J.,McGehee, Michael D.,Beaujuge, Pierre M.
-
supporting information
p. 4656 - 4659
(2013/05/09)
-
- ACTIVE MATERIALS FOR PHOTOELECTRIC DEVICES
-
A conjugated polymer has a repeated unit having the structure of formula (I) wherein A1, A2, R1 and R2 are independently selected from the group consisting of a proton, an alkyl group comprising up to 18 carbon atoms, an alkoxy group comprising up to 18 carbon atoms, cyano, nitro, aryls and substituted aryls, and wherein Ar is selected from the group consisting of ethenylene, ethynylene, monocyclic arylene, bicyclic arylene, polycyclic arylene, monocyclic heteroarylene, bicyclic heteroarylene, polycyclic heteroarylene, and one to five such groups one of fused or linked.
- -
-
Page/Page column 17
(2010/04/27)
-
- Benzodichalcogenophenes with Perfluoroarene Termini
-
(Chemical Equation Presented) Benzodichalcogenophenes are functionalized at their termini via SNAr reactions of their bismetalates with perfluoroarenes. The identities of X, Y, and W are varied to study the effects on LUMO energy levels and cry
- Wang, Yongfeng,Parkin, Sean R.,Watson, Mark D.
-
supporting information; experimental part
p. 4421 - 4424
(2009/05/11)
-