Bithiazole-bridged dyes for dye-sensitized solar cells with high open circuit voltage performance

He, Jinxiang; Wu, Wenjun; Hua, Jianli; Jiang, Yihua; Qu, Shengchun; Li, Jing; Long, Yi‐Tao; Tian, He

doi:10.1039/c0jm03811c

Cited by 149 publications

(56 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[24][25][26] The synthesis of TBT-T3 are depicted in Scheme 2. The Suzuki coupling reaction of compound 1 with (4-(p-tolyl)-1, 2, 3, 3a, 4, 8b-hexahydrocyclopenta [b]indol-7-yl)-boronic acid produced compound 2.…”

Section: Synthesismentioning

confidence: 99%

“…In 2009, Li's research group reported that organic photovoltaics based on bithiazole copolymers achieved power conversion e±ciency of 3.0% with J sc ¼ 8:0 mAcm À2 and V oc ¼ 0:70 V. 23 In our previous studies, we designed and synthesized a series of bithiazole-bridged sensitizers. [24][25][26] High-performance and long-term stability were achieved. In this paper, we developed our research and investigated the e®ect of thiophene in bithiazole-bridged dyes: BT-T2, TBT-T2, BT-T3 and TBT-T3 (see Scheme 1) on the performance of DSSCs, in which two most common donors, triphenylamine and indoline, were adopted for comparison.…”

Section: Introductionmentioning

confidence: 95%

“…24 After the post-treatment of 40 mmol TiCl 4 aqueous solution at room temperature overnight, the photoanodes were calcinated at 450 C for 30 min and cooled down to 80 C before dipping into the solution of 10 mM chenodeoxycholic acid (CDCA) in ethanol for 2 h. After rinsing with ethanol and drying, the photoanodes were immersed into a 3 Â 10 À4 M dye solution in dichloromethane for 16 h at room temperature. After rinsing with ethanol and drying, the dye-sensitized photoanodes were sealed with platinized counter electrodes using 25-m-thick Surlyn (Dupont) as a binder and a spacer.…”

Section: Fabrication Of Dsscsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Thiophene in Bithiazole-Bridged Sensitizers on the Performance of Dye-Sensitized Solar Cells

Zhang

Guo

et al. 2014

NANO

Self Cite

View full text Add to dashboard Cite

In this paper, we have designed and synthesized four bithiazole-bridged sensitizers (BT-T2, TBT-T2, BT-T3 and TBT-T3) with triphenylamine and indoline as the donor segment and applied them to dye-sensitized solar cells (DSSCs). For triphenylamine-based sensitizers as BT-T2 and TBT-T2, adding one thiophene unit between triphenylamine donor and bithiazole moiety not only led to bathochromic shift of the maximum absorption and increase of molar extinction coe±cient, but also enhanced the photovoltaic conversion e±ciency from 7.12% of BT-T2 to 7.51% of TBT-T2. But for indoline-based sensitizers as BT-T3 and TBT-T3, adding one thiophene unit between indoline donor and bithiazole moiety resulted in hypochromatic shift instead of bathochromic shift. We employed the density functional theory (DFT) calculations to further investigate the in°uence of the thiophene unit on their optical and electronic properties and photovoltaic performance of corresponding DSSC devices. Given the results, a reasonable explanation is the introduction of thiophene unit suppressed the intramolecular charge transfer and charge separation in the conjugation system of indoline-based sensitizer, which led to the hypochromatic shift of the maximum absorption wavelength and¯nally the low J sc . Since the J sc dropped sharply from 15.26 mAcm À2 to 4.52 mAcm À2 , the photovoltaic conversion e±ciency decreased dramatically from 7.86% to 1.93%.

show abstract

Section: Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Fabrication Of Dsscsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Thiophene in Bithiazole-Bridged Sensitizers on the Performance of Dye-Sensitized Solar Cells

Zhang

Guo

et al. 2014

NANO

Self Cite

View full text Add to dashboard Cite

show abstract

“…Dye-Sensitized Solar Cells (DSSCs) are regarded as one of the most promising alternatives to conventional solid-state photovoltaic devices owing to their low production cost, easy fabrication and relatively high solar-to-electricity conversion efficiency [1][2][3][4][5][6][7][8]. DSSCs based on polypyridyl Ru complexes such as N3 and N719 have been reported to show high photoelectric conversion efficiencies of over 11% at AM1.5 conditions [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Simple Fluorene Based Triarylamine Metal-Free Organic Sensitizers

Gupta

Singh

Islam

et al. 2015

Electrochimica Acta

View full text Add to dashboard Cite

“…[18] Recently, it was found that organic D-A-p-A sensitizers displayed several advantages (such as tuning of the molecular energy levels, improvement of photovoltaic performance, and stability). [19][20][21][22][23][24][25][26] Inserting an auxiliary acceptor, which acts as an electron trap, increases the efficiency of charge separation and facilitates electron transfer from the donor to the anchor. Other consequences of a second acceptor moiety are often broader spectral ranges and enhanced stabilities.…”

Section: Introductionmentioning

confidence: 99%

New Organic Donor–Acceptor–π–Acceptor Sensitizers for Efficient Dye‐Sensitized Solar Cells and Photocatalytic Hydrogen Evolution under Visible‐Light Irradiation

Cui

Wang

et al. 2014

ChemSusChem

Self Cite

View full text Add to dashboard Cite

Two organic donor-acceptor-π-acceptor (D-A-π-A) sensitizers (AQ and AP), containing quinoxaline/pyrido[3,4-b]pyrazine as the auxiliary acceptor, have been. Through fine-tuning of the auxiliary acceptor, a higher designed and synthesized photoelectric conversion efficiency of 6.02% for the AQ-based dye-sensitized solar cells under standard global AM1.5 solar conditions was achieved. Also, it was found that AQ-Pt/TiO2 photocatalysts displayed a better rate of H2 evolution under visible-light irradiation (420 nm<λ<780 nm) because of the stability of the oxidized states and the lower rates of electron recombination. Importantly, sensitizers AQ and AP-Pt/TiO2 showed strong photocatalytic activity during continuous light soaking for 10 h with methanol as the sacrificial electron donor. Additionally, the processes of their intermolecular electron transfer were further investigated theoretically by using time-dependent DFT. The calculated results indicate that the auxiliary acceptor plays the role of an electron trap and results in broad spectral responses.

show abstract

Bithiazole-bridged dyes for dye-sensitized solar cells with high open circuit voltage performance

Cited by 149 publications

References 62 publications

Effect of Thiophene in Bithiazole-Bridged Sensitizers on the Performance of Dye-Sensitized Solar Cells

Effect of Thiophene in Bithiazole-Bridged Sensitizers on the Performance of Dye-Sensitized Solar Cells

Simple Fluorene Based Triarylamine Metal-Free Organic Sensitizers

New Organic Donor–Acceptor–π–Acceptor Sensitizers for Efficient Dye‐Sensitized Solar Cells and Photocatalytic Hydrogen Evolution under Visible‐Light Irradiation

Contact Info

Product

Resources

About