Solution-Processable Star-Shaped Photovoltaic Organic Molecule with Triphenylamine Core and Benzothiadiazole−Thiophene Arms

Zhang, Jing; Yang, Yi; He, Chang; He, Youjun; Guo, Zhao; Li, Yongfang

doi:10.1021/ma901896n

Cited by 130 publications

(83 citation statements)

References 31 publications

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“…In 2009, Zhang and co-workers [69] reported a starshaped OSM 22 containing TPA as the central building blocks, benzothiadiazole-(4-hexyl)thiophene (BT-4HT) as the terminal acceptor units and vinylene as the π-conjugation bridges. Benefited from the effective connection with conjugated bridge, the absorption spectrum of 22 demonstrated strong absorption region from 300 to 630 nm.…”

Section: π-Linkage With Alkene and Its Derivativesmentioning

confidence: 99%

π-Linkage effect of push-pull-structure organic small molecules for photovoltaic application

Yin

2016

Sci. China Mater.

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Much attention has been paid to the push-pullstructure organic small molecule (OSM) materials for photovoltaic (PV) application in the past decade, due to their facile reduction of energy band gap (Eg) and effective control of PV properties. π-bridge plays an important role in the push-pull-structure OSMs since an appropriate π-linkage is crucial for improving the PV performance of organic solar cells (OSCs). In this review, various π-bridge groups (thiophene, alkene, alkyne, arene and heterocycle) and the pertinent π-linkage effect will be systematically summarized. These results suggest that the in-depth study of the π-linkage effect is essential to deeply understanding the relationship between the molecular structure and property, thus improving PV performance.

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Section: π-Linkage With Alkene and Its Derivativesmentioning

confidence: 99%

π-Linkage effect of push-pull-structure organic small molecules for photovoltaic application

Yin

2016

Sci. China Mater.

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“…Also, TPA as a good electron-donating unit has been introduced to the dye-sensitized solar cells (DSSCs) [24] and small molecular BHJ organic solar cells (OSCs) [25], where it gave the versatile successes in achieving highefficacy photovoltaic performance. Li et al synthesized a series of star-shaped small molecules using TPA unit as a core and studied their photovoltaic performance detailedly, where the PCE can reach 3 % with the open circuit voltage (V oc ) as high as about 0.9 V [26][27][28][29]. In PSCs, Zhu et al introduced TPA as the pendant donor unit into the polymer side chains and synthesized a novel narrow band-gap polymer which showed the PCE of 3.08 % [30].…”

Section: Introductionmentioning

confidence: 99%

Triphenylamine-based broad band-gap polymers for bulk-heterojunction polymer solar cells

Zhang

Liang

et al. 2015

J Mater Sci

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Three triphenylamine-based broad band-gap polymers P1, P2, and P3 were designed and synthesized by Suzuki polycondensation. The optical band gaps of P1, P2, and P3 were 1.90, 19.5, and 1.99 eV, respectively. The calculated highest occupied molecular orbit energy levels of P1, P2, and P3 were -5.31, -5.29, and -5.32 eV, respectively, by cyclic voltammogram characterization. The hole mobilities of P1, P2, and P3 were 1.6 9 10 -4 , 5.9 9 10 -5 , and 4.1 9 10 -5 cm 2 v -1 s -1 , respectively, by the space charge-limited current method. The polymer solar cells were fabricated under the device architecture of ITO/PEDOT:PSS/polymer:PC 61 BM or PC 71 BM/(PFN)/Al. All solar cells displayed the high open circuit voltages, where the highest ones can reach 0.90 V for P1 and P2. The P1-and P2-based solar cells gave the best power conversion efficiency of 3.37 and 3.34 %, respectively.

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“…Compound 4-bromo-7-(5-(2-ethylhexyl)thiophen-2-yl)benzo [c]- [1,2,5] thiadiazole ( 1 ) [ 21 ] was prepared according to the literature. The detailed synthetic processes of the other compounds are described as follows.…”

Section: Methodsmentioning

confidence: 99%

Improved Photovoltaic Performance of a Side‐Chain D–A Polymer in Polymer Solar Cells by Shortening the Phenyl Spacer between the D and A Units

Fan

Xiao

et al. 2014

Macro Chemistry & Physics

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Solution-Processable Star-Shaped Photovoltaic Organic Molecule with Triphenylamine Core and Benzothiadiazole−Thiophene Arms

Cited by 130 publications

References 31 publications

π-Linkage effect of push-pull-structure organic small molecules for photovoltaic application

π-Linkage effect of push-pull-structure organic small molecules for photovoltaic application

Triphenylamine-based broad band-gap polymers for bulk-heterojunction polymer solar cells

Improved Photovoltaic Performance of a Side‐Chain D–A Polymer in Polymer Solar Cells by Shortening the Phenyl Spacer between the D and A Units

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