Poly(3,4-ethylenedioxythiophene) Hole-Transporting Material Generated by Photoelectrochemical Polymerization in Aqueous and Organic Medium for All-Solid-State Dye-Sensitized Solar Cells

Zhang, Jinbao; Yang, Lei; Shen, Yang; Park, Byung Wook; Hao, Yan; Johansson, Erik M. J.; Boschloo, Gerrit; Kloo, Lars; Gabrielsson, Erik; Sun, Licheng; Jarboui, Adel; Perruchot, Christian; Jouini, Mohamed; Vlachopoulos, Nick; Hagfeldt, Anders

doi:10.1021/jp412504s

Cited by 51 publications

(55 citation statements)

References 54 publications

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“…Role of donor-π-acceptor sensitizers was described [140] A new method using aqueous micellar solutions was shown [141] The effect of light intensity on the oxidation level of PEDOT was studied [142] Carbon and carbon derivatives such as carbon nanotubes (CNTs), graphene, graphene oxide (GO), and reduced graphene oxide (rGO) are other potential components for the synthesis of nanohybrids (Table 8). Ansari et al [32] synthesized graphene/PANI nanocomposites using an in situ oxidative polymerization in the presence of CTAB as a surfactant.…”

Section: Ppy/agmentioning

confidence: 99%

Recent Advances in Nanostructured Conducting Polymers: from Synthesis to Practical Applications

2016

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Abstract:Conducting polymers (CPs) have been widely studied to realize advanced technologies in various areas such as chemical and biosensors, catalysts, photovoltaic cells, batteries, supercapacitors, and others. In particular, hybridization of CPs with inorganic species has allowed the production of promising functional materials with improved performance in various applications. Consequently, many important studies on CPs have been carried out over the last decade, and numerous researchers remain attracted to CPs from a technological perspective. In this review, we provide a theoretical classification of fabrication techniques and a brief summary of the most recent developments in synthesis methods. We evaluate the efficacy and benefits of these methods for the preparation of pure CP nanomaterials and nanohybrids, presenting the newest trends from around the world with 205 references, most of which are from the last three years. Furthermore, we also evaluate the effects of various factors on the structures and properties of CP nanomaterials, citing a large variety of publications.

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Section: Ppy/agmentioning

confidence: 99%

Recent Advances in Nanostructured Conducting Polymers: from Synthesis to Practical Applications

2016

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“…The photoelectrochemical polymerization (PEP) approach could provide uniform pore‐filling of HTMs, with good adhesion between the HTM and dye/TiO 2 . In addition, the HTM conductivity is much higher than that of spiro‐OMeTAD, which enables the use of relatively thick dye/TiO 2 electrodes with higher light absorbance . Furthermore, the generated conducting polymer HTMs can be simultaneously electrochemically doped in situ in the PEP process, without the necessity of chemical doping of the HTMs.…”

Section: Figurementioning

confidence: 99%

Efficient Blue‐Colored Solid‐State Dye‐Sensitized Solar Cells: Enhanced Charge Collection by Using an in Situ Photoelectrochemically Generated Conducting Polymer Hole Conductor

et al. 2016

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A high power conversion efficiency (PCE) of 5.5 % was achieved by efficiently incorporating a diketopyrrolopyrrole-based dye with a conducting polymer poly(3,4-ethylenediothiophene) (PEDOT) hole-transporting material (HTM) that was formed in situ, compared with a PCE of 2.9 % for small molecular spiro-OMeTAD-based solid-state dye solar cells (sDSCs). The high PCE for PEDOT-based sDSCs is mainly attributed to the significantly enhanced charge-collection efficiency, as a result of the three-order-of-magnitude higher hole conductivity (0.53 S cm(-1) ) compared with that of the widely used low molecular weight HTM spiro-OMeTAD (3.5×10(-4) S cm(-1) ).

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“…The effi ciencies of these cells were 5.6%. [ 22 ] Considering this, a barrier layer that does not affect electron transfer from LUMO of the dye to TiO 2 and electrolyte to the HOMO of the dye is desirable. It will be an added advantage, if the layer is prepared by solution process.…”

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confidence: 99%

Band Edge Modulated Polymer Layer to Decrease Back Electron Transfer and Increase Efficiency in Sensitized Solar Cells

Arulkashmir

Sudhakar

Krishnamoorthy

2016

Advanced Energy Materials

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time scale of electron transport from TiO 2 to conducting glass is in milliseconds. [ 7 ] Thus, the increased residence time of the electron in TiO 2 increases the possibility of BeT with the holes in either dyes or electrolyte. In fact, the recombination of electron in TiO 2 with that of the holes in electrolytes has been found to be one of the major causes of decreased DSSC efficiency. Thus, suppression of BeT process is an effective way to improve the DSSC effi ciency. However, the approach should not affect the electron injection from the dyes to the TiO 2 . One of the approaches to suppress the BeT process is the addition of additives in the redox electrolytes. [ 8,9 ] These additives adsorb on the TiO 2 and decrease the BeT. [ 10 ] Modifi cation of TiO 2 by alkyl silane is another approach to suppress the BeT. [11][12][13] Although these approaches increased the effi ciency of DSSC, the improvement is not very high because the layer thickness is not high. The attempt to use longer alkyl chain silanes with an objective of increasing the thickness did not signifi cantly alter the DSSC effi ciency due to the imperfect coverage of the TiO 2 surface. [ 14,15 ] Several inorganic oxide barrier layers such as Al 2 O 3 , HfO 2 , and In 2 O 3 have been explored as barrier layer. [16][17][18][19] These barrier layers were deposited before dye absorption either by chemical bath deposition or by atomic layer deposition. The insulating nature of these layers affects the charge injection process. Furthermore, the energy levels of the barrier layer also affect the electron transfer dynamics. [ 20 ] Organic polymers have been coated on top of TiO 2 in solid state dye sensitized solar cells with a different objective. An ion-ligating polymer with different ionization potential has been used to facilitate cascade electron transport. [ 21 ] Photo electropolymerized PEDOT was used as hole transport layer in a solid state dye sensitized solar cell without any other electrolyte. The effi ciencies of these cells were 5.6%. [ 22 ] Considering this, a barrier layer that does not affect electron transfer from LUMO of the dye to TiO 2 and electrolyte to the HOMO of the dye is desirable. It will be an added advantage, if the layer is prepared by solution process. Toward this objective, we have used semiconducting polymers with commensurate band edges to retard the BeT process ( Figure 1 a). The polymers with the structures shown in Figure 1 b were tested and found out that a polymer with a HOMO and LUMO levels at −5.8 and −3.1 eV, respectively, can improve the DSSC effi ciency by 22%. The effi ciency Recombination of charges residing in the TiO 2 and redox electrolyte is one of the factors affecting the effi ciency of dye sensitized solar cells (DSSCs). To circumvent this recombination, inorganic oxide barrier layers and organic silanes have been coated on TiO 2 /dyes. Due to the insulating nature of these layers, the effi ciency increase is not very impressive. Conducting polymers with different band edges are used to suppress the cha...

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Poly(3,4-ethylenedioxythiophene) Hole-Transporting Material Generated by Photoelectrochemical Polymerization in Aqueous and Organic Medium for All-Solid-State Dye-Sensitized Solar Cells

Cited by 51 publications

References 54 publications

Recent Advances in Nanostructured Conducting Polymers: from Synthesis to Practical Applications

Recent Advances in Nanostructured Conducting Polymers: from Synthesis to Practical Applications

Efficient Blue‐Colored Solid‐State Dye‐Sensitized Solar Cells: Enhanced Charge Collection by Using an in Situ Photoelectrochemically Generated Conducting Polymer Hole Conductor

Band Edge Modulated Polymer Layer to Decrease Back Electron Transfer and Increase Efficiency in Sensitized Solar Cells

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