Journal of Materials Chemistry A
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2014
·Vol. 3
·期 3
·1333-1344
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IF 0
Zu-Sheng Huang,Cheng Cai,Xu-Feng Zang,Zafar Iqbal,Heping Zeng,Dai-Bin Kuang,Lingyun Wang,Herbert Meier,Derong Cao
Two novel double branched D–π–A organic dyes (DB dyes) are synthesized to investigate the influence of the linkage location in DB dyes on the performance of dye-sensitized solar cells (DSSCs), where phenothiazine is introduced as a donor, thiophene–benzotriazole unit as the π-bridge and cyanoacrylic acid as the electron-acceptor. The photophysical, electrochemical and photovoltaic properties of the dyes are systematically investigated. The results show that the location of the linkage unit has a small effect on the physical and electrochemical properties of the dyes. However, when the dyes are applied in DSSCs, an obvious decline of short-circuit current (Jsc) and open-circuit voltage (Voc) is found by moving the linkage unit from the donor part to the π-bridge part. The DSSC based on the dye DB-D with the linkage unit in the donor obtains an overall power conversion efficiency of 6.13%, which is about 68% higher than that (3.65%) of the DSSC based on the dye DB-B with the linkage unit in the π-bridge. The DB-B based device exhibits a lower efficiency due to its serious aggregation and short electron lifetime. The results indicate that the linkage location of the dyes has a big effect on the performance of the DSSCs.
研究领域:
材料科学
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能源科学
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光化学
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DOI
ACS Omega
·
2025
·
IF 4.3
Ramarajan Ramanathan,Ashish Kumar,Himamaheswara Rao,Raj Kumar Samudrala
Researchers are actively investigating cost-effective, indium-free n-type transparent conducting oxides (TCOs) for optoelectronic applications. Silver-doped SnO2 (ASO) thin films, fabricated via spray deposition, serve as promising alternative electrodes for dye-sensitized solar cells (DSSCs), where Ag doping optimizes the electrical and optical properties. The structural, morphological, optical, and electrical transport properties of the as-deposited ASO thin films were analyzed using X-ray diffraction, field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, UV–vis spectroscopy, and Hall effect measurements to assess phase composition, surface morphology, elemental states, optical behavior, and charge transport characteristics. At 0.4 wt % Ag (ASO4), the film exhibits 88.7% transmittance in the visible range, a wide bandgap of 3.73 eV, and low resistivity (4.26 × 10–4 Ω cm) with a sheet resistance of 18.6 Ω/□, making it a superior TCO candidate. To understand charge transport mechanisms, Arrhenius analysis was used to determine activation energies, while a four-probe method revealed resistance stability up to 400 °C. The power conversion efficiency (PCE) of the DSSC device was effectively optimized using ASO electrodes, where varying Ag concentrations played a crucial role in enhancing efficiency. Notably, the ASO4 film demonstrated a remarkable PCE of 4.69%. Integrating ASO electrodes into DSSCs yielded enhanced PCE, reinforcing their viability as a cost-effective replacement for ITO/FTO electrodes in the next-generation solar technology.
研究领域:
材料科学
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光伏技术
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薄膜技术
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光电子学
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纳米材料
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产品关联
DOI
PubMed
高影响因子
Micro & Nano Letters
·
2021
·Vol. 16
·期 3
·232-238
·
IF 1.102
Altan Bolag,Qiaoling Wang,Linan Liu,Tumenkhuslen Jamiyansuren,Ugtakhbayar Tumurpurev,Norovsambuu Tuvjargal,Tana Bao,Jun Ning,Hexig Alata,Ojiyed Tegus
An effective and efficient photovoltaic performance is significantly affected by the interface between different constituents of dye sensitized solar cells (DSSC). A novel dual post treatment of TiCl 4 and urea solutions on different layers of TiO 2 electrode is addressed and the TiO 2 particle morphology, dye-adsorption amount on the TiO 2 electrode and the photovoltaic performance of the DSSC based on those electrodes are characterised in this work. TiCl 4 treatment can form more binding site on TiO 2 particles and urea treatment structures a thin layer of g-C 3 N 4 on the surface of TiO 2 particles. This strategy can not only effectively increase the dye-adsorption for light-harvesting, but also facilitate the electron transfer through inhibiting the charge recombination between TiO 2 and electrolyte, and moreover, it provides excess electrons for the photoanodes. The DSSC fabricated from TiO 2 electrode processed with urea treatment on the sixth layer exhibited the highest power conversion efficiency of 8.94% with a short current density J sc of 24.09 mA cm –2 , an open circuit voltage V oc of 583 mV and a fill factor of 63.8.
研究领域:
材料科学
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可再生能源
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太阳能电池
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电化学
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2026
·
IF 4.7
Soumya Shukla,Rajnish Kurchania,Ramarajan Ramanathan
A highly conductive, transparent conducting electrode (TCE) based on Ba and Sb codoped tin oxide (BATO) has been successfully spray-deposited for dye-sensitized solar cell (DSSC) applications, offering a promising alternative to conventional fluorine-doped tin oxide/indium tin oxide (FTO/ITO) electrodes. ATO is one of the most extensively studied TCE materials. However, its commercialization remains limited due to suboptimal electrical conductivity and optical transparency. The present research focuses on enhancing these properties by introducing Ba as a codopant in ATO thin films. Barium codopant effectively decreases the grayish color and helps optimize oxygen-vacancy density, which enhances electrical conductivity in ATO thin film. The spray-deposited large-area (10 × 10 cm2) BATO thin film exhibits an enhanced optical transmittance of 86%, a low resistivity of 4.605 × 10–4 Ω·cm, and a minimum sheet resistance of 13.7 Ω/□ significantly outperforming the corresponding ATO film. Importantly, the suitability of BATO and ATO electrodes was evaluated in DSSC devices, and the obtained results were compared to those of DSSCs employing commercial FTO electrodes. A power conversion efficiency (η) of 3.27% was recorded for the DSSC employing the BATO electrode, outperforming the ATO-based counterpart, which exhibited an efficiency of 2.39%. Interestingly, the alternative BATO electrode significantly reduces the reliance on indium-based TCOs and mitigates the optimization challenges associated with FTO electrodes, thereby contributing to a more cost-effective fabrication of DSSC solar cell devices.
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产品关联
DOI
高影响因子
SYNTHETIC METALS
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2013
·
IF 2.109
Wang Gang,Tan Haijun,Zhang Yiping,Wu Yingying,Hu Zhubin,Yu Guipeng,Pan Chunyue
Novel D-π-A system organic dyes (ID1, ID2 and ID3) based on isoindigo (ID), which contain triphenylamine (ID1) or isoindigo (ID2 and ID3) as electron donors, isoindigo and thiophene as a π-conjugated system and a cyanoacrylic acid moiety as an electron acceptor and anchoring group, have been then synthesized and characterized by 1 H NMR, UV–vis, CV. Dye-sensitized solar cells (DSSCs) based on these dyes were also fabricated and tested. As the photovoltaic performance tests demonstrated, the ID1 exhibits broader absorption spectra , higher maximum incident photon-to-current conversion efficiency (IPCE) and maximum photon-to-electron conversion efficiency ( η ) of 3.33% under 100 mW/cm 2 simulated AM 1.5G solar irradiation.
研究领域:
材料科学
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能源科学
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有机化学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2014
·
IF 2.2
Min Xi,Yulan Zhang,Lizhen Long,Xinjun Li
Rutile TiO 2 nanorod arrays (TNRs) were achieved by hydrothermal process on TiCl 4 pretreated Ti foil. Subsequently, TNRs were hydrothermally etched in HCl solution to form hollow TiO 2 nanorod arrays (H-TNRs). The TiCl 4 pretreatment plays key roles in enhancement of Ti foil corrosion resistance ability and crystal nucleation introduction for TNRs growth. TNRs with desired morphology can be obtained by controlling TiCl 4 concentration and the amount of tetrabutyl titanate (TTB) accordingly. TNRs with the length of ~1.5 μm and diameter of ~200 nm, obtained on 0.15 M TiCl 4 pretreated Ti foil with 0.6 mL TTB, exhibits relatively higher photocurrent . The increased pore volume of the H-TNRs has contributed to the increased surface area which is benefit for Dye-Sensitized Solar Cells (DSSC) application. And the 180 °C-H-TNRs photoanode obtained from the 0.15-TiCl 4 -TNRs sample demonstrated 128.9% enhancement of photoelectric efficiency of DSSC compared to that of the original TNR photoanode.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Xinyang Liu,Zhu Mao,Jing Liu,Fanxu Meng,Xiumin Shi,Xiangxin Xue,Bing Zhao
Photoelectric conversion efficiency is primarily determined by the carrier transport path of the dye-sensitized solar cell (DSSC) interface. While open-circuit voltage (VOC) is one of the important performance parameters in DSSCs, a deeper understanding of its correlation with the photogenerated carrier transport at the photoanode interface has always been a major challenge for researchers. Here, we propose an in situ Raman spectroscopy strategy for synchronously monitoring the VOC value of DSSCs to investigate the photoanode operation mechanisms by revealing electrolyte species and dye evolution at the photoanode/electrolyte interface. TiO2 nanoparticles are modified on TiO2 nanotube array surfaces to improve the specific surface area of dye sensitization and, thus, regulate the VOC of DSSCs. The results confirm that fluctuations in the Raman spectral intensities of polyiodide formed at the photoanode/electrolyte interface during photosensitization are highly correlated with the VOC value. Furthermore, direct spectroscopic evidence also revealed that pentaiodide is spontaneously and reversibly regenerated under DSSC operating conditions. Finally, a semiquantitative method for measuring VOC of DSSCs using Raman spectroscopy is established. This study represents that in situ Raman spectroscopy can be used as an effective platform for precisely revealing the optimization mechanism of VOC in real-time, thereby providing evidence at the molecular level for improving the photovoltaic conversion performance of DSSCs.
研究领域:
材料科学
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物理化学
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可再生能源
·
光谱学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2015
·
IF 2.495
Xiaoqin Wang,Yong Zhang,Qiangqiang Xu,Jinxin Xu,Bohua Wu,Min Gong,Jia Chu,Shanxin Xiong
A low-cost quasi-solid dye-sensitized solar cell (DSSC) with a photoelectric conversion efficiency of 1.79% was assembled using PVDF-based gel electrolyte plasticized by PC–EC and electrodeposited Pt counter electrodes. Its morphology, chemical structure, electrochemical and photoelectric properties were examined by SEM, FTIR, EIS and I – V tests, respectively. The results showed that PC–EC plasticized gel electrolyte can greatly prevent the α-phase formation of PVDF, and had the loose structure & many interpenetrating holes due to the effective intercalation of PC & EC into PVDF chains through their dipole interaction. It made the migration or diffusion of iodide ions to electrodes easier. Furthermore, its conductivity was increased to 2.34 mS/cm from 1.00 mS/cm of unplasticized gel electrolyte. V oc , J sc , FF & η values of DSSC plasticized by PC–EC were all enhanced. Compared with Pt electrode obtained by thermal decomposition, electrodeposited Pt electrode had the lower charge-transfer resistance and the better contact with gel electrolyte in quasi-solid DSSC due to its orderly grain arrangement, more even, denser and larger active surface. Meanwhile, its process also had little influence on ITO sheet resistance. Thus, its quasi-solid DSSC has the higher photoelectric conversion efficiency.
研究领域:
材料科学
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可再生能源
·
电化学
·
太阳能电池
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DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2018
·
IF 2.943
Yi-Yi Liu,Xin-Yu Ye,Qing-Qing An,Bing-Xin Lei,Wei Sun,Zhen-Fan Sun
The bottom-straight and top-bent dual anatase TiO 2 nanowires directly on flurine-doped tin oxide (FTO) glass substrate are successfully synthesized for the first time via a two-step solvothermal reaction, which obtains single anatase TiO 2 nanowires with the diameter of 250–450 nm and the length of ∼49 μm in the first growth step, and the slender TiO 2 nanowires with the diameter of 40–80 nm intertwining larger nanowires to form dual nanowires network in the secondary growth step. Dye-sensitized solar cell (DSSC) based on dual TiO 2 nanowires exhibits the power conversion efficiency of 5.30%, which is much higher than those of DSSCs based on the pristine single TiO 2 nanwires (2.36%) due to the twining network like dual nanowires structure maintaining excellent electron transport and simultaneously enhancing the specific surface area and light scattering ability. Moreover, by TiO 2 sol treatment, the performance of dual TiO 2 nanowires based DSSC can be further enhanced, reaching an impressive power conversion efficiency (PCE) of 7.65%.
研究领域:
材料科学
·
纳米技术
·
太阳能
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2021
·
IF 3.196
Xiaolong Shi,Yuanzuo Li,Lihai Wang
Two novel analogues (AF3-1 and AF3-2) of natural pigments that were originally found in wine product, pyranoanthocyanidins, were designed based on pyrano-4′-dimethylamino-10-phenyl-flavylium (AF3) by respectively introducing another electron donor(s), dimethylamino and two methoxyl groups, to the phenyl moiety. They were synthesized and then successfully applied as sensitizers in DSSC to study effect of the additional donor(s) on the DSSC performance for such pyranoanthocyanidin. The introduced second dimethylamino substituent of AF3-1 slightly red shifts the absorption spectrum. Both title dyes show relatively strong ability to shield the photoanode surface from electrolyte and to restrain the electron recapture process. Yet it is difficulty for them to adsorb on the semiconductor surface effectively and to avoid undesirable dye aggregation. DSSCs based on the designed pyranoanthocyanidin turn out to have much higher V oc but decreased J sc compared to AF3. PCE of DSSC assembled with the better of the two pyranoanthocyanidins, AF3-1, is 1.79%, on the same level as that of the reference sensitizer.
研究领域:
化学
·
材料科学
·
太阳能
✓ 已验证
DOI
高影响因子
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