Front-side illuminated CdS/CdSe quantum dots co-sensitized solar cells based on TiO2nanotube arrays
Xiao‐Fang GuanShuqing HuangQuanxin ZhangXi ShenHuicheng SunDongmei LiYanhong LuoRicheng YuQingbo Meng
26
Citation
41
Reference
10
Related Paper
Citation Trend
Abstract:
We fabricated a front-side illuminated CdS/CdSe quantum dots co-sensitized solar cell based on TiO2 nanotube arrays. The freestanding TiO2 nanotube arrays were first detached from anodic oxidized Ti foils and then transferred to the fluorine-doped tin oxide to form photoanodes. An opaque Cu2S with high electrochemical activity was used as the counter electrode. A photovoltaic conversion efficiency as high as 3.01% under one sun illumination has been achieved after optimizing the deposition time of CdSe quantum dots and the length of the TiO2 nanotube arrays. It is observed that the power conversion efficiency of quantum dots sensitized solar cells from the front-side illumination mode (3.01%) is much higher than that of the back-side illumination mode (1.32%) owing to the poor catalytic activity of Pt to polysulfide electrolytes and light absorption by the electrolytes for the latter.Keywords:
Tin oxide
Auxiliary electrode
Chemical bath deposition
Auxiliary electrode
Chemical bath deposition
Tin oxide
Polysulfide
Deposition
Cite
Citations (51)
Multi-walled carbon nanotubes (MWCNTs) with different morphologies were introduced into dyesensitized solar cell (DSSC) as low-cost substitutes for Pt counter electrode (CE). The effect of length and orientation of MWCNTs on the power conversion efficiency (PCE) of DSSC with MWCNTs CE were studied by measuring electrochemical impedance spectroscopy of MWCNTs and the photocurrent density–voltage (J–V ) characteristics of DSSC in this study. Results revealed that the long MWCNTs showed better electrocatalytic activity of reducing triiodide ions than short MWCNTs and yielded the power conversion efficiency of 2.42%. When the aligned multi-walled carbon nanotubes (AMWCNTs) with the same length as the long MWCNTs were used to prepare the CE, the power conversion efficiency of the DSSC reaches 2.95%. In order to further improve the performance of the DSSC, the processing of photoanode and counter electrode were adjusted. The power conversion efficiency of the cell with AMWCNTs as CE prepared by adjusted processing achieved 3.95% and the short circuit current density is superior to the DSSC with Pt as CEs, and it indicated the adjusted processing is beneficial to increase the overall performance of the dye-sensitized solar cell.
Auxiliary electrode
Triiodide
Photocurrent
Cite
Citations (6)
Auxiliary electrode
Photocurrent
Cite
Citations (0)
The in situ electropolymerized-polyaniline (PANI) film (thickness: 5–20 l m) on FTO (fluorine tin oxide) glass doped by various counterions SO2-4, ClO-4 ,BF-4,Cl-, p-toluenesulfonate (TsO-), etc. was prepared with electropolymerized charge capacity of 50–600 mC cm-2. Different doping counterions have great impact on the morphology, electrochemical activity of electropolymerized-PANI film. The electropoly-merized-PANI doped by SO24 anion (PANI-SO4) film with much porous morphology and pore size diam-eter of several micrometers possesses higher reduction current for reduction of I-3 and a low charge-transfer resistance of 1.3 Ω cm2 in comparison with Pt as counter electrode (CE). Dye-sensitized solar cell with PANI-SO4 as CE was assembled, and the device under full sunlight illumination (100 mW cm-2,AM1.5 G) shows 5.6% photovoltaic conversion efficiency, which is comparable to 6.0% of that with Pt CE under the same experimental condition.
Auxiliary electrode
Tin oxide
Cite
Citations (0)
Auxiliary electrode
Cite
Citations (15)
Tin oxide
Auxiliary electrode
Cite
Citations (196)
Auxiliary electrode
Tin oxide
Glass electrode
Cite
Citations (4)
Auxiliary electrode
Cite
Citations (67)
We prepared dye-sensitized solar cells (DSSCs) with enhanced energy conversion efficiency using open-ended $TiO_2$ nanotube arrays with a $TiO_2$ scattering layer. As compared to closed-ended $TiO_2$ nanotube arrays, the energy conversion efficiency of the open-ended $TiO_2$ nanotube arrays was increased from 5.63% to 5.92%, which is an enhancement of 5.15%. With the $TiO_2$ scattering layer, the energy conversion efficiency was increased from 5.92% to 6.53%, which is an enhancement of 10.30%. After treating the open-ended $TiO_2$ nanotube arrays with $TiCl_4$ , the energy conversion efficiency was increased from 6.53% to 6.89%, a 5.51% enhancement, which is attributed to improved light harvesting and increased dye adsorption.
Energy transformation
Cite
Citations (12)
Auxiliary electrode
Tin oxide
Cite
Citations (23)