A Solution‐Processable Dithienyldiketopyrrolopyrrole Dye Molecule with Acetylene as a π‐Linkage for Organic Solar Cells

Wang, Liping; Xia, Yan; Luo, Guoping; Zhang, Chun-Hui; Liu, Quan; Tan, Wan‐Yi; Zhu, Xu‐Hui; Wu, Hongbin; Peng, Junbiao; Cao, Yong

doi:10.1002/ajoc.201500068

Cited by 8 publications

(4 citation statements)

References 43 publications

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“…Literature suggests surface roughness for a similar device ranged from 0.907 nm-1.49 nm. [26] Our surface roughness is significantly greater (20-23 nm) than this value and need to be reduced in order to achieve a higher current density and power conversion efficiency. The number of dewetting spots also plays a significant role on the charge density of a film.…”

Section: Resultsmentioning

confidence: 99%

T-Shaped Indan-1,3-dione derivatives as promising electron donors for bulk heterojunction small molecule solar cell

et al. 2017

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We report on the photovoltaic performance of novel T-Shaped Indan-1,3-dione derivatives as donors in a solution processed bulk heterojunction solar cells. Small molecule bulk heterojunction solar cells of these molecules with [6,6]-phenyl-C61-butyric acid methyl ester (PC 61 BM) were fabricated and characterized. The preliminary characterization of these devices yielded a PCE of 0.24 % and 0.33 % for two separate derivatives. These low power conversion efficiencies were attributed to a high surface roughness with a large number of dewetting spots. Doping with 10 % Polystyrene in the Indan-1,3-dione derivatives decreases surface roughness and dewetting spots thereby improving the efficiency of the devices. Efficiency of the devices was found as 0.39 % and 0.51 % for two derivatives after doping with polystyrene. The charge transfer mechanism was studied with photoluminescence quenching. The morphology and packing behavior of molecules were further studied using Atomic Force Microscopy (AFM) and X-ray diffraction (XRD).

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Section: Resultsmentioning

confidence: 99%

T-Shaped Indan-1,3-dione derivatives as promising electron donors for bulk heterojunction small molecule solar cell

et al. 2017

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“…Due to these intriguing features, alkynyl-incorporated TDPP-based small molecules have already been reported with impressive PCE of 2.06−5.94%. 630 Zhu and co-workers 640 reported an oligo-yne 314a (Chart 51) in which TDPP was symmetrically connected through a 9,10-anthracenyl unit to 3alkylthiophene via an ethynyl linkage. BHJ based on this visible light absorbing materials (650 nm with a shoulder at 737 nm, tailing until ca.…”

Section: Optoelectronics (O-es)mentioning

confidence: 99%

Rise of Conjugated Poly-ynes and Poly(Metalla-ynes): From Design Through Synthesis to Structure–Property Relationships and Applications

et al. 2018

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Conjugated poly-ynes and poly(metalla-ynes) constitute an important class of new materials with potential application in various domains of science. The key factors responsible for the diverse usage of these materials is their intriguing and tunable chemical and photophysical properties. This review highlights fascinating advances made in the field of conjugated organic poly-ynes and poly(metalla-ynes) incorporating group 4-11 metals. This includes several important aspects of conjugated poly-ynes viz. synthetic protocols, bonding, electronic structure, nature of luminescence, structure-property relationships, diverse applications, and concluding remarks. Furthermore, we delineated the future directions and challenges in this particular area of research.

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“…The compounds DPP(TBFu) 2 , DT-DPP(AAnAT) 2 , DPPEZnP-TEH, and DPPEZnP-BzTBO were synthesized according to the reported method. − Solvents including 1-phenyloctane (PO) and tetrahydrofuran (THF) were purchased from J&K Company and used without further purification. The highly oriented pyrolytic graphite (HOPG, grade ZYB) was obtained from NT-MDT, Russia, and used as the substrate.…”

Section: Methodsmentioning

confidence: 99%

“…As Nguyen et al developed DPP(TBFu) 2 , 3,6-bis(5-(benzofuran-2-yl)thiophen-2-yl)-2,5-bis(2-ethylhexyl)pyrrolo[3,4- c ]pyrrole-1,4-dione) in 2009, DPP(TBFu) 2 has been widely investigated in the field of OSCs. − Our co-workers Peng et al designed a linearly conjugated molecule DT-DPP(AAnAT) 2 , in which 9,10-anthracenyl (An) and 3-alkylthiophene (T) are symmetrically connected onto the DT-DPP core via acetylene (A) linkage . DT-DPP(AAnAT) 2 showed potential application in OSCs because of the strong electron withdrawing ability, intense absorption in the visible range, and solution-processed ability.…”

Section: Introductionmentioning

confidence: 99%

Unravelling the Self-Assembly of Diketopyrrolopyrrole-Based Photovoltaic Molecules

Qian

Gao

et al. 2018

Langmuir

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The nanostructure of bulk heterojunction in an organic solar cell dominating the electron transport process plays an important role in improving the device efficiency. However, there is still a great need for further understanding the local nanostructures from the viewpoint of molecular design because of the complex alignment in the solid film. In this work, four kinds of photovoltaic materials containing a diketopyrrolopyrrole (DPP) unit combined with other different building blocks were selected and their self-assembled structures on a solid surface were studied by scanning tunneling microscopy technique in combination with theory calculations. The results reveal these DPP-based photovoltaic molecules self-assembled into different nanostructures, which strongly depend on the chemical structure, in particular the backbones and alkyl side chains. The planarities of backbones are affected both by molecule-substrate interaction and steric hindrance induced by the substituted thiophene or benzo[ b]thiophene units on DPP and porphyrin building blocks. The substituted branched alkyl side chains are out of the plane, which are influenced by the alignments of molecular backbones. In addition, the solution concentration also shows a large effect on the self-assembled nanostructures. This systematic research on the self-assembled structures of DPP-based semiconductors on a surface would provide guidance for designing materials and controlling the morphology of a donor/acceptor heterojunction system.

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A Solution‐Processable Dithienyldiketopyrrolopyrrole Dye Molecule with Acetylene as a π‐Linkage for Organic Solar Cells

Cited by 8 publications

References 43 publications

T-Shaped Indan-1,3-dione derivatives as promising electron donors for bulk heterojunction small molecule solar cell

T-Shaped Indan-1,3-dione derivatives as promising electron donors for bulk heterojunction small molecule solar cell

Rise of Conjugated Poly-ynes and Poly(Metalla-ynes): From Design Through Synthesis to Structure–Property Relationships and Applications

Unravelling the Self-Assembly of Diketopyrrolopyrrole-Based Photovoltaic Molecules

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