Anti‐Oxidizing Radical Polymer‐Incorporated Perovskite Layers and their Photovoltaic Characteristics in Solar Cells

Suwa, Koki; Oyaizu, Kenichi; Segawa, Hiroshi; Nishide, Hiroyuki

doi:10.1002/cssc.201901601

Cited by 24 publications

(10 citation statements)

References 62 publications

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“…Nishide and co-workers employed for the first time a radical-bearing redox-active polymer, poly(1-oxy-2,2,6,6-tetramethylpiperidin-4-yl methacrylate) ( PTMA , Figure ). This polymeric material demonstrated to act as an effective scaffold to form high-quality perovskite grains. Furthermore, its radical nature makes it an antioxidizing agent for the perovskite layer, suppressing the degradation of the perovskite by eliminating the formation of a superoxide anion radical, thus enhancing the stability against ambient oxygen.…”

Section: Polymers As Additives For Pscsmentioning

confidence: 99%

Organic Polymers as Additives in Perovskite Solar Cells

2021

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The wide field of polymer chemistry has recently encountered the unique, promising field of perovskite solar cells (PSCs). Thanks to their chemical versatility, the possible applications of organic polymers within solar devices have been highly diversified as charge-transporting materials, of either hole or electrons, or as additives, being these blended into the designed layer or used as a buffer layer. The use of different organic polymers as additives has demonstrated to be beneficial for the device performance and stability, thanks to an improved morphology of the thin layers and to their assistance in the charge transport. This perspective intends to provide the reader with a clear viewpoint on the role that polymers play as additives in PSCs. Thus, the most important examples describing the use of these macromolecules as additives in each of the possible target layers within PSCs are reported. Understanding the role played by the polymer together with the necessary chemical functionalities that provide each role within the solar cells is of primary importance in the future design of polymeric materials to be used in PSCs. Therefore, with this perspective article, we expect to contribute in the rational design of next-generation organic polymers suitable to surpass the current state of the art in PSCs.

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Section: Polymers As Additives For Pscsmentioning

confidence: 99%

Organic Polymers as Additives in Perovskite Solar Cells

2021

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“…In addition to dissolution during ORB cycling, solution processing of PTMA should be conducted using a dissolving solvent that yields homogeneous films or electrodes. This is especially important when considering the solid-state properties of the PTMA-based films, since defects or morphological changes can alter the properties . For the production of homogeneous PTMA-based electrodes, solvents and additives (binder and conductive additives) must be selected to dissolve or favorably interact with each other to optimize performance. , Most commonly, N -methyl-2-pyrrolidone (NMP) is used as the dissolving medium; however, the need for more environmentally friendly alternatives has focused attention to other solvents.…”

Section: Introductionmentioning

confidence: 99%

Nitroxide Radical Polymer–Solvent Interactions and Solubility Parameter Determination

et al. 2020

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Redox-active polymers such as macromolecular nitroxide radicals have been studied as electrode materials for organic batteries and electronics. Polymer−solvent interactions are essential to processing and device performance, but macromolecular nitroxide radical−solvent interactions are currently not well described. In this work, the Hildebrand and Hansen solubility parameters of poly(2,2,6,6-tetramethylpiperidinyloxy-4-yl methacrylate) (PTMA), oxidized PTMA (PTMA + ), and PTMA's precursor (PTMPM) are determined using both experimental and group contribution methods for the first time. This work indicates that the hydrogen-bonding Hansen solubility parameter (δ h ) and the solubility sphere radii (R) provide the best prediction of the macromolecular radical's interaction with solvents. From these solubility parameters, the group contribution values for the nitroxide and oxoammonium cation were then calculated. It is shown that this information allows for the prediction of polymer−solvent interactions for other nitroxide-based macromolecular radicals. Finally, the discovered solubility parameters are used to predict PTMA electrode formulations for batteries that outperform controls.

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“…The superoxide anion radical generated following light irradiation on the layer was eliminated by PTMA, which could react with the perovskite molecule and degrade it into lead halide. The photovoltaic conversion efficiency of a cell made with a PTMA-incorporated perovskite layer (0.3 wt.% amount of the polymer vs. the perovskite) and a hole-transporting PTAA (polytriarylamine) layer was 18.8% [ 154 ].…”

Section: Polymers In Perovskite Solar Cells (Pscs)mentioning

confidence: 99%

Polymers in High-Efficiency Solar Cells: The Latest Reports

et al. 2022

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Third-generation solar cells, including dye-sensitized solar cells, bulk-heterojunction solar cells, and perovskite solar cells, are being intensively researched to obtain high efficiencies in converting solar energy into electricity. However, it is also important to note their stability over time and the devices’ thermal or operating temperature range. Today’s widely used polymeric materials are also used at various stages of the preparation of the complete device—it is worth mentioning that in dye-sensitized solar cells, suitable polymers can be used as flexible substrates counter-electrodes, gel electrolytes, and even dyes. In the case of bulk-heterojunction solar cells, they are used primarily as donor materials; however, there are reports in the literature of their use as acceptors. In perovskite devices, they are used as additives to improve the morphology of the perovskite, mainly as hole transport materials and also as additives to electron transport layers. Polymers, thanks to their numerous advantages, such as the possibility of practically any modification of their chemical structure and thus their physical and chemical properties, are increasingly used in devices that convert solar radiation into electrical energy, which is presented in this paper.

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Anti‐Oxidizing Radical Polymer‐Incorporated Perovskite Layers and their Photovoltaic Characteristics in Solar Cells

Cited by 24 publications

References 62 publications

Organic Polymers as Additives in Perovskite Solar Cells

Organic Polymers as Additives in Perovskite Solar Cells

Nitroxide Radical Polymer–Solvent Interactions and Solubility Parameter Determination

Polymers in High-Efficiency Solar Cells: The Latest Reports

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