Influence of the surface treatment of PEDOT:PSS layer with high boiling point solvent on the performance of inverted planar perovskite solar cells

Li, Hongmei; Li, Xueyuan; Zhang, Lianping; Hong, Qiuming; Tang, Jianxin; Zhang, Anping; Ma, Chang‐Qi

doi:10.1016/j.orgel.2017.05.025

Cited by 27 publications

(23 citation statements)

References 40 publications

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“…Comparing our results with previous works, we found that there are several reports dealing with the use of different solvents to tailor and tune PEDOT:PSS properties [65][66][67]. In most cases, the works have used high boiling point solvents, as EG [13,66,68],…”

Section: Nanostructure Fabricationsupporting

confidence: 73%

“…DMF [68] and DMSO [65][66][67][68], or alcohols as ethanol or methanol [13,69]. In these reports, the authors did not observed the formation of well-defined nanostructures, as the ones obtained in our current work using THF.…”

Section: Nanostructure Fabricationcontrasting

confidence: 46%

“…Moreover, these high boiling points solvents allowed tuning the PEDOT:PSS electrical properties, in most cases enhancing the electrical conductivity of the polymer. Nonetheless, an improved electrical conductivity is not the unique factor to consider when tailoring PEDOT:PSS for final applications [68,70,71]. For example, Liu et al were able increase the transport properties of PEDOT:PSS thin films by spin casting EG, DMF, and/or DMSO [68].…”

Section: Nanostructure Fabricationmentioning

confidence: 99%

“…Nonetheless, an improved electrical conductivity is not the unique factor to consider when tailoring PEDOT:PSS for final applications [68,70,71]. For example, Liu et al were able increase the transport properties of PEDOT:PSS thin films by spin casting EG, DMF, and/or DMSO [68]. However, the authors observed that the treated films, with enhanced conductivities, led to poorer device performance in perovskite-based solar cells.…”

Section: Nanostructure Fabricationmentioning

confidence: 99%

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Solvent-structured PEDOT:PSS surfaces: fabrication strategies and nanoscale properties

Sanviti

Mester

Hillenbrand

et al. 2021

Preprint

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We present the preparation of nanostructured conducting PEDOT:PSS thin films by solvent vapor annealing (SVA), using the low boiling point solvent tetrahydrofuran (THF). An Atomic Force Microscopy (AFM) study allowed the observation of distinct nanostructure development as a function of solvent exposure time. Moreover, the nanostructures’ physical properties were evaluated by nanomechanical, nanoelectrical, and nano-FTIR measurements. In this way, we were able to differentiate the local response of the developed phases and to identify their chemical nature. The combination of these techniques allowed to demonstrate that exposure to THF is a facile method to effectively and selectively modify the surface nanostructure of PEDOT:PSS, and thereafter its final properties. Moreover, our nanoscale studies provided evidence about the molecular rearrangements that PEDOT:PSS suffers during nanostructure fabrication, a fundamental fact in order to expand the potential applications of this polymer in thermoelectric and optoelectronic devices.

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Section: Nanostructure Fabricationsupporting

confidence: 73%

Section: Nanostructure Fabricationcontrasting

confidence: 46%

Section: Nanostructure Fabricationmentioning

confidence: 99%

Section: Nanostructure Fabricationmentioning

confidence: 99%

See 2 more Smart Citations

Solvent-structured PEDOT:PSS surfaces: fabrication strategies and nanoscale properties

Sanviti

Mester

Hillenbrand

et al. 2021

Preprint

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“…The perovskite layer was fabricated via a one‐step or anti‐solvent procedure to see the influence of the perovskite layer preparation method. For the perovskite cells fabricated via one‐step procedure, an additional PSSNa layer was inserted between the PEDOT:PSS and perovskite layer to improve the device performance . Figure a and b shows the current density‐voltage ( J–V ) and external quantum efficiency (EQE) spectra of the two devices.…”

Section: Resultsmentioning

confidence: 99%

Fully Solution‐Processed Semi‐Transparent Perovskite Solar Cells With Ink‐Jet Printed Silver Nanowires Top Electrode

et al. 2018

Self Cite

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Owing to the sensitivity of the perovskite thin film to solvent, preparation of metal top electrode by solution process is of great challenging. This is the key technology for the realization of fully solution processed perovskite solar cells. In this paper, we report the preparation of transparent silver nanowires (AgNW) top electrode for perovskite solar cells using inkjet printing process. Experiment results demonstrate that low device performance with low fill factor was obtained when the AgNW is directly printed onto the PC61BM layer. This is ascribed to the mismatched work functions of the AgNW electrode and PC61BM layer, and the solvent assisted chemical corrosion of the AgNW electrode by halogen anions. By inserting a thin layer of polyethylenimine (PEI), the charge injection barrier between PC61BM and AgNW electrode was minimized. More importantly, such a thin PEI layer suppresses the chemical corrosion of AgNW electrode during printing, yielding a condensed and uniform AgNW networks. The introduction of a thin PEI layer greatly improves the device performance and stability. A high power conversion efficiency of 14.17% with an averaged light transmittance of 21.2% was achieved for the PEI/AgNW cells. In addition, improved performance stability was measured for the PEI/AgNW cells.

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Interface Engineering of Perovskite/Hole Transport Layer Using Nano‐Network Formation in Small Molecule–Polymer Blend for Efficient Inverted Perovskite Solar Cells

Lee

Hong

Lee

et al. 2021

Adv Materials Inter

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Inserting the interfacial layer adjusts the energy levels between the electrode and the semiconductor, reduces the recombination of charges at the interfaces, and facilitates charge carrier transport. [14-18] Organic conjugated semiconducting materials have been considered promising interfacial materials owing to their ability to control optoelectronic properties through molecular engineering, the possibility of their application in flexible devices, and low-temperature processes generally below 150 °C. [16,19] Small-molecule semiconducting materials have been studied as one of the interface materials based on their advantages of having a well-defined molecular structure and molecular weight, simple purification, and reproducibility between batches compared with organic polymers. [20-22] In particular, metal phthalocyanines and their derivatives have received considerable attention for increasing the efficiency and stability of optoelectronic devices, owing to their high hole mobility, excellent thermal and chemical stabilities, and low cost. [20,23-25] Despite their advantages, unsubstituted phthalocyanines exhibit low solubility; thus, their film formation methods are limited to processes such as thermal evaporation, [26-29] or they require additional synthesis for solution processing. [30-33] Metal-phthalocyanine tetrasulfonic acids (TS-MPc; M = Cu, Ni etc.) are introduced with sulfonate ion groups that induce their high water solubility for solution processing. However, most soluble small molecules, such as TS-MPc, exhibit poor film formation due to their strong molecular interactions in solution. [34] To overcome the problem of poor film formation, one useful technology is the blending of small molecules with other conjugated polymers, which can improve both film uniformity and charge transfer properties through advanced molecular packing. [35-39] Recently, some research groups reported hole transporting layer (HTL) of PSCs with increased the efficiency and stability of the devices by doping TS-MPc into poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS). The main material in the HTL in their devices was PEDOT:PSS using TS-MPc as a good dopant. [38,39] Herein, we are the first to report the nano-mesh structure formation in a TS

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Influence of the surface treatment of PEDOT:PSS layer with high boiling point solvent on the performance of inverted planar perovskite solar cells

Cited by 27 publications

References 40 publications

Solvent-structured PEDOT:PSS surfaces: fabrication strategies and nanoscale properties

Solvent-structured PEDOT:PSS surfaces: fabrication strategies and nanoscale properties

Fully Solution‐Processed Semi‐Transparent Perovskite Solar Cells With Ink‐Jet Printed Silver Nanowires Top Electrode

Interface Engineering of Perovskite/Hole Transport Layer Using Nano‐Network Formation in Small Molecule–Polymer Blend for Efficient Inverted Perovskite Solar Cells

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