Fabrication of TiO2/CdS heterostructure photoanodes and optimization of light scattering to improve the photovoltaic performance of dye sensitized solar cells (DSSCs)

Photocurrent Density ◽

Cds Nanoparticles ◽

Molar Ratios ◽

Dye Sensitized ◽

Abstract Currently, the TiO2/CdS photoanodes based dye sensitized solar cells (DSSCs) have shown extraordinary developments in the photo conversion efficiency. In this report, pristine TiO2, CdS and various molar ratios of TiO2/CdS photoanodes were prepared by one step microwave irradiation route and followed by doctor blade method. The sheet like morphology of the TiO2 and CdS nanoparticles were clearly evident from the SEM and TEM images. A significant reduction band gap with enhanced light absorption and rapid prevention of electron hole pair was explored by UV-DRS and PL studies. The photocurrent density-voltage (J-V) and electrochemical impedance (EIS) characteristics were analyzed for assembled solar cell. The photo-conversion efficiency of 12.8% was obtained with the configuration TiO2/CdS (200 mg) that represent a 2.5 fold increment compared to bare TiO2 (5.33%) as well as commercial Pt (6.11%). The experimental results are discussed.

Piperidine-Substituted Perylene Sensitizer for Dye-Sensitized Solar Cells

Advances in OptoElectronics ◽

10.1155/2011/860486 ◽

2011 ◽

Vol 2011 ◽

pp. 1-7 ◽

Cited By ~ 7

Author(s):

Joe Otsuki ◽

Yusho Takaguchi ◽

Daichi Takahashi ◽

Palanisamy Kalimuthu ◽

Surya Prakash Singh ◽

...

Keyword(s):

Solar Cells ◽

Conversion Efficiency ◽

Short Circuit ◽

Photocurrent Density ◽

Open Circuit ◽

Visible Range ◽

Dye Sensitized ◽

We have prepared a novel piperidine-donor-substituted perylene sensitizer, PK0002, and studied the photovoltaic performance in dye-sensitized solar cells (DSSCs). Physical properties and photovoltaic performance of this new perylene derivative PK0002 are reported and compared with those of unsubstituted perylene sensitizer, PK0003. PK0002, when anchored to nanocrystalline TiO2 films, achieves very efficient sensitization across the whole visible range extending up to 800 nm. The incident photon-to-current conversion efficiency (IPCE) spectrum was consistent with the absorption spectrum and resulted in a high short-circuit photocurrent density (Jsc) of 8.8 mA cm-2. PK0002 showed higher IPCE values than PK0003 in the 520–800 nm region. Under standard AM 1.5 irradiation (100 mW cm-2) and using an electrolyte consisting of 0.6 M dimethylpropyl-imidazolium iodide, 0.05 M I2, 0.1 M LiI, and 0.5 M tert-butylpyridine in acetonitrile, a solar cell containing sensitizer PK0002 yielded a short-circuit photocurrent density of 7.7 mA cm-2, an open-circuit photovoltage of 0.57 V, and a fill factor of 0.70, corresponding to an overall conversion efficiency of 3.1%.

Construction of NiMoS3/BC heterostructure photoanodes and optimization of light scattering to improve the photovoltaic performance of dye sensitized solar cells (DSSCs)

10.21203/rs.3.rs-289198/v1 ◽

2021 ◽

Author(s):

T Sumathi ◽

Sonia A Fredricka ◽

G Deepa

Keyword(s):

Solar Cells ◽

Large Scale ◽

Photocurrent Density ◽

Electron Hole ◽

Dye Sensitized ◽

Electron Hole Pair ◽

Conversion Efficiencies ◽

Abstract In the last two decades, dye sensitized solar cells (DSSCs) have gotten a lot of attention from researchers and have progressed quickly. To promote commercialization and large-scale application of DSSCs, their efficiency should be increased. This paper details significant advancements in advanced NiMoS3/BC nanocomposites for improving photoanodes and DSSC conversion efficiencies. The fabricated electrode samples were characterized by XRD, SEM, TEM, Raman, UV, PL and BET to explore the structural, morphological and optical properties. A significant reduction band gap with enhanced light absorption and rapid prevention of electron hole pair was explored by UV-DRS and PL studies. The photocurrent density-voltage (J-V) and IPCE characteristics were analyzed for assembled solar cell. The NiMoS3/BC (NMSC5) nanocomposite DSSC showed a PCE of 8.85%, far higher than that of the NiMoS3 (2.45%) and a PCE value equivalent to Pt CE (4.79 %). The enhanced PCE of the proposed electrodes are also discussed in scientifically.

Analysis of Charge Transport and Recombination Studied by Electrochemical Impedance Spectroscopy for Dye-sensitized Solar Cells With Atomic Layer Deposited Metal Oxide Treatment on TiO2 Surface

MRS Proceedings ◽

10.1557/proc-1270-gg04-05 ◽

2010 ◽

Vol 1270 ◽

Author(s):

Braden Bills ◽

Mariyappan Shanmugam ◽

Mahdi Farrokh Baroughi ◽

David Galipeau

Keyword(s):

Solar Cells ◽

Electrochemical Impedance Spectroscopy ◽

Impedance Spectroscopy ◽

Atomic Layer ◽

Back Reaction ◽

Dye Sensitized ◽

AbstractThe performance of dye-sensitized solar cells (DSSCs) is limited by the back-reaction of photogenerated electrons from the porous titanium oxide (TiO2) nanoparticles back into the electrolyte solution, which occurs almost exclusively through the interface. This and the fact that DSSCs have a very large interfacial area makes their performance greatly dependant on the density and activity of TiO2 surface states. Thus, effectively engineering the TiO2/dye/electrolyte interface to reduce carrier losses is critically important for improving the photovoltaic performance of the solar cell. Atomic layer deposition (ALD), which uses high purity gas precursors that can rapidly diffuse through the porous network, was used to grow a conformal and controllable aluminum oxide (Al2O3) and hafnium oxide (HfO2) ultra thin layer on the TiO2 surface. The effects of this interfacial treatment on the DSSC performance was studied with dark and illuminated current-voltage and electrochemical impedance spectroscopy (EIS) measurements.

Photovoltaic Performance of Dye-Sensitized Solar Cells Containing ZnO Microrods

Nanomaterials ◽

10.3390/nano9121645 ◽

2019 ◽

Vol 9 (12) ◽

pp. 1645 ◽

Cited By ~ 2

Author(s):

Seong Il Cho ◽

Hye Kyeong Sung ◽

Sang-Ju Lee ◽

Wook Hyun Kim ◽

Dae-Hwan Kim ◽

...

Keyword(s):

Solar Cells ◽

Surface Area ◽

Collection Efficiency ◽

Charge Recombination ◽

Growth Time ◽

Dye Sensitized ◽

At an elevated temperature of 90 °C, a chemical bath deposition using an aqueous solution of Zn(NO3)2·6H2O and (CH2)6N4 resulted in the formation of both nanoflowers and microrods of ZnO on F-doped SnO2 glass with a seed layer. The nanoflowers and microrods were sensitized with dyes for application to the photoelectrodes of dye-sensitized solar cells (DSSCs). By extending the growth time of ZnO, the formation of nanoflowers was reduced and the formation of microrods favored. As the growth time was increased from 4 to 6 and then to 8 h, the open circuit voltage (Voc) values of the DSSCs were increased, whilst the short circuit current (Jsc) values varied only slightly. Changes in the dye-loading amount, dark current, and electrochemical impedance were monitored and they revealed that the increase in Voc was found to be due to a retardation of the charge recombination between photoinjected electrons and I3− ions and resulted from a reduction in the surface area of ZnO microrods. A reduced surface area decreased the dye contents adsorbed on the ZnO microrods, and thereby decreased the light harvesting efficiency (LHE). An increase in the electron collection efficiency attributed to the suppressed charge recombination counteracted the decreased LHE, resulting in comparable Jsc values regardless of the growth time.

Titanium Dioxide Nanotubes Decorated with Nanoparticles for Dye Sensitized Solar Cells

MRS Proceedings ◽

10.1557/opl.2011.404 ◽

2011 ◽

Vol 1303 ◽

Author(s):

Xuan Pan ◽

Yong Zhao ◽

Changhong Chen ◽

Zhaoyang Fan

Keyword(s):

Titanium Dioxide ◽

Solar Cells ◽

Conversion Efficiency ◽

Photon Absorption ◽

Device Performance ◽

Dye Sensitized ◽

Dye Loading ◽

ABSTRACTThe titanium dioxide (TiO2) nanoparticle (NP) structure has higher surface area and dye loading value to increase photon absorption while the nanotube (NT) can suppress the random walk phenomena to enhance carrier collection. In this work, hydrothermal method was utilized to infiltrate the TiO2 nanotube array by TiO2 nanoparticles with the aim of combining the advantages of both nanostructures to improve dye sensitized solar cells (DSSCs) efficiency. Structure morphology, device performance, and electrochemical properties were investigated. SEM observation confirmed that around 10 nm TiO2 nanoparticles uniformly covered the NT wall. TiO2 NT samples at three different lengths: 8 μm, 13 μm and 20 μm, decorated with different amount of nanoparticles were studied to optimize the structure for light absorption and electron transport to achieve high solar conversion efficiency. Electrochemical impedance spectroscopy (EIS) was also employed to investigate the cells’ parameters: electron lifetime (τ), diffusion length (Ln) et al, to gain insight on the device performance. The incident photon conversion efficiency (IPCE) was also reported.

Effects of triphenyl phosphate as an inexpensive additive on the photovoltaic performance of dye-sensitized nanocrystalline TiO2 solar cells

RSC Advances ◽

10.1039/c5ra06849e ◽

2015 ◽

Vol 5 (62) ◽

pp. 50483-50493 ◽

Cited By ~ 11

Author(s):

Malihe Afrooz ◽

Hossein Dehghani

Keyword(s):

Solar Cells ◽

Conversion Efficiency ◽

Photoelectric Conversion Efficiency ◽

Triphenyl Phosphate ◽

Photoelectric Conversion ◽

Nanocrystalline Tio2 ◽

Dye Sensitized ◽

In this study, triphenyl phosphate (TPP) is applied as an effective and inexpensive additive in the dye sensitized solar cells (DSSCs) and an increase in the photoelectric conversion efficiency is obtained of almost 24%.

Effect of Mg Doping on SnO2 Energy Band and Power Conversion Efficiency of Dye-Sensitized Solar Cells

Journal of Physics Conference Series ◽

10.1088/1742-6596/2101/1/012066 ◽

2021 ◽

Vol 2101 (1) ◽

pp. 012066

Author(s):

Hao Yang ◽

Hao Fan ◽

Junhong Duan

Keyword(s):

Solar Cells ◽

Power Conversion Efficiency ◽

Conversion Efficiency ◽

Power Conversion ◽

Mg Doping ◽

Dye Sensitized ◽

Sensitized Solar Cells ◽

Mg Doped

Abstract In this work, Mg-doped SnO2 materials with different molar ratios were synthesized by hydrothermal method. Based on the UV-Vis study, band gap (Eg) of the Mg-doped SnO2 is adjusted from 3.76 eV to 3.65 eV via 3 at% concentrations. Results of photovoltaic measurement for dye-sensitized solar cells (DSCs) based on Mg-doped SnO2 film as photoanode indicate that the doping of Mg ions can improve the open-circuit voltage (V oc) of the DSCs, while the electric current density (J sc) of the DSCs is almost unchanged. The cells were measured at 3 days intervals within 24 days after fabrication. Power conversion efficiency (PCE) of 3 at% Mg-doped SnO2 DSCs increases step by step and achieves 4.38% as the cell is tested after 18 days. Electrochemical impedance spectroscopy (EIS) analysis shows that Mg doping enhances light collection, increased the number of photogenerated electrons and inhibits charge recombination.

Enhanced Efficiency of Dye-Sensitized Solar Cells by Trace Amount Ca-Doping in TiO2Photoelectrodes

Journal of Nanomaterials ◽

10.1155/2015/974161 ◽

2015 ◽

Vol 2015 ◽

pp. 1-5 ◽

Cited By ~ 8

Author(s):

Mengmei Pan ◽

Hanjun Liu ◽

Zhongyu Yao ◽

Xiaoli Zhong

Keyword(s):

Solar Cells ◽

Conversion Efficiency ◽

Trace Amount ◽

Collection Efficiency ◽

Short Circuit ◽

Photocurrent Density ◽

Charge Collection Efficiency ◽

Dye Sensitized ◽

Trace amount Ca-doped TiO2films were synthesized by the hydrothermal method and applied as photoanodes of dye-sensitized solar cells (DSSCs). To prepare Ca-doped TiO2film electrodes, several milliliters of Ca(NO3)2solution was added in TiO2solution during the hydrolysis process. The improvements of DSSCs were confirmed by photocurrent density-voltage (J-V) characteristics, electrochemical impedance spectroscopy (EIS) measurements. Owing to the doping effect of Ca, the Ca-doped TiO2thin film shows power conversion efficiency of 7.45% for 50 ppm Ca-doped TiO2electrode, which is higher than that of the undoped TiO2film (6.78%) and the short-circuit photocurrent density(Jsc)increases from 13.68 to 15.42 mA·cm−2. The energy conversion efficiency and short-circuit current density(Jsc)of DSSCs were increased due to the faster electron transport in the Ca-doped TiO2film. When Ca was incorporated into TiO2films, the electrons transport faster and the charge collection efficiencyηccis higher than that in the undoped TiO2films.

Study on Carbon Nanocomposite Counterelectrode for Dye-Sensitized Solar Cells

Journal of Nanomaterials ◽

10.1155/2012/601736 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Yiming Chen ◽

Haiyan Zhang ◽

Yuting Chen ◽

Jiapeng Lin

Keyword(s):

Solar Cells ◽

Short Circuit ◽

Composite Electrodes ◽

Dye Sensitized ◽

Sensitized Solar Cells ◽

Carbon Nanocomposite ◽

Nanocomposite Electrodes

Carbon nanocomposite electrodes were prepared by adding carbon nanotubes (CNTs) into carbon black as counterelectrodes of dye-sensitized solar cells(DSSCs). The morphology and structure of carbon nanocomposite electrodes were studied by scanning electron microscopy. The influence of CNTs on the electrochemical performance of carbon nanocomposite electrodes is investigated by cyclic voltammetry and electrochemical impedance spectroscopy. Carbon nano composite electrodes with CNTs exhibit a highly interconnected network structure with high electrical conductivity and good catalytic activity. The influence of different CNTs content in carbon nanocomposite electrodes on the open-circuit voltage, short-circuit current, and filling factor of DSSCs is also investigated. DSSCs with 10% CNTs content exhibit the best photovoltaic performance in our experiments.

Influence of Electrolyte Refreshing on the Photoelectrochemical Performance of Fiber-Shaped Dye-Sensitized Solar Cells

International Journal of Photoenergy ◽

10.1155/2012/104597 ◽

2012 ◽

Vol 2012 ◽

pp. 1-8

Author(s):

Zhibin Lv ◽

Hongwei Wu ◽

Xin Cai ◽

Yongping Fu ◽

Dan Wang ◽

...

Keyword(s):

Solar Cells ◽

Photocurrent Density ◽

Vital Role ◽

Open Circuit ◽

Electron Recombination ◽

Photoelectrochemical Performance ◽

Dye Sensitized ◽

Given the convenient sealing of fiber-shaped dye-sensitized solar cells (FDSSCs), the electrolyte refreshing effect on the photo-electrochemical performance of FDSSCs was studied. The electron transport and interfacial recombination kinetics were also systematically investigated by electrochemical impedance spectroscopy. With increased electrolyte refreshing times from 0 to 10, the open-circuit voltage (Voc) and fill factor (FF) increased, whereas the photocurrent density (Jsc) and power conversion efficiency (PCE) significantly decreased. The increasedVocwas mainly ascribed to the electron recombination resistance (Rct, WE) at the TiO2/electrolyte interface and electron lifetime. The decreasedJscand PCE were due to dye desorption and the increase of series resistance. Further investigation proved that Li+played a vital role in increasingVocas electrolyte refreshing and Li+had more significant impact than TBP (tert-butyl pyridine) on maintaining highVoc.