Structural color-tunable mesoporous bragg stack layers based on graft copolymer self-assembly for high-efficiency solid-state dye-sensitized solar cells

Lee, Chang‐Soo; Park, Jung Tae; Kim, Jong Hak

doi:10.1016/j.jpowsour.2016.05.129

Cited by 14 publications

(10 citation statements)

References 62 publications

(35 reference statements)

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“…The poly(vinyl chloride)- g -poly(oxyethylene methacrylate) (PVC- g -POEM) graft copolymer template and the preformed WO 3 species were respectively prepared to synthesize WO 3 thin films with various shapes. PVC- g -POEM was synthesized through atom transfer radical polymerization (ATRP), according to our previously reported method. , Briefly, 6 g of PVC was dissolved in N -methyl-2-pyrrolidone (NMP, J.T. Baker, 99.5%) at 70 °C over the course of 3 h, followed by addition of 0.12 g of CuCl, 0.23 mL of HMTETA, and 12 mL of POEM to the solution of well-dissolved PVC.…”

Section: Experimental Sectionmentioning

confidence: 99%

Insight into Charge Separation in WO₃/BiVO₄ Heterojunction for Solar Water Splitting

Chae

Lee

Jung

et al. 2017

ACS Appl. Mater. Interfaces

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148

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Recently, the WO/BiVO heterojunction has shown promising photoelectrochemical (PEC) water splitting activity based on its charge transfer and light absorption capability, and notable enhancement of the photocurrent has been achieved via morphological modification of WO. We developed a graft copolymer-assisted protocol for the synthesis of WO mesoporous thin films on a transparent conducting electrode, wherein the particle size, particle shape, and thickness of the WO layer were controlled by tuning the interactions in the polymer/sol-gel hybrid. The PEC performance of the WO mesoporous photoanodes with various morphologies and the individual heterojunctions with BiVO (WO/BiVO) were characterized by measuring the photocurrents in the absence/presence of hole scavengers using light absorption spectroscopy and intensity-modulated photocurrent spectroscopy. The morphology of the WO photoanode directly influenced the charge separation efficiency within the WO layer and concomitant charge collection efficiency in the WO/BiVO heterojunction, showing the smaller sized nanosphere WO layer showed higher values than did the plate-like or rod-like one. Notably, we observed that photocurrent density of WO/BiVO was not dependent on the thickness of WO film or its charge collection time, implying slow charge flow from BiVO to WO can be a crucial issue in determining the photocurrent, rather than the charge separation within the nanosphere WO layer.

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Section: Experimental Sectionmentioning

confidence: 99%

Insight into Charge Separation in WO₃/BiVO₄ Heterojunction for Solar Water Splitting

Chae

Lee

Jung

et al. 2017

ACS Appl. Mater. Interfaces

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148

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“…Thus, the graft copolymer was designed to possess hydrophobic glassy PVC main chains and hydrophilic rubbery POEM side chains, which are responsible for preferential interactions with hydrophilic TTIP to achieve selective confinement. Owing to the low cost and ease of synthesizing graft copolymers, self‐assembly of graft copolymer hybrids is more attractive than that of conventional block copolymers . It has been reported that a well‐organized TiO 2 layer with high crystallinity, high porosity, a large number of mesopores, and great interconnectivity is generated via a sol–gel reaction upon heat treatment of PVC‐ g ‐POEM/TTIP hybrids at 450 °C .…”

Section: Resultsmentioning

confidence: 99%

“…Many studies have explored the addition of fillers, such as multi‐walled carbon nanotubes (MWCNTs), graphene oxide, metal oxides, and plasticizers, into polymer membranes to enhance the hydrophilicity and surface porosity. Among the various metal oxides, titanium dioxide (TiO 2 ) exhibits hydrophilicity, antibacterial effects, high stability, and good interaction with hydrophilic functional groups .…”

Section: Introductionmentioning

confidence: 99%

Ultrafiltration membranes based on hybrids of an amphiphilic graft copolymer and titanium isopropoxide

Park

Kim

et al. 2017

J of Applied Polymer Sci

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Graft copolymer poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) is combined with titanium isopropoxide (TTIP) to form hybrids that undergo phase separation in a water bath. The water permeance of the PVC-g-POEM membrane increases by hybridization with TTIP owing to an increase in the surface pore size and porosity. Upon heating to 80 8C, the water permeances of PVC-g-POEM and PVC-g-POEM/TTIP decrease owing to the increased thickness of the top layer. However, the bovine serum albumin (BSA) rejection of PVC-g-POEM increases, while that of PVC-g-POEM/TTIP decreases. This is attributed to accelerated dissolution of TTIP at 80 8C, resulting in a large number of surface pores. The antifouling performance is significantly improved by TTIP addition and heating owing to increased hydrophilicity, as confirmed by contact angle, O/C atomic ratio, and water content measurements. The PVC-g-POEM/TTIP membrane prepared at 25 8C shows the best performance [338 L m 22 h 21 bar 21 (LMH) water permeance, 89.4% BSA rejection, and 91.9% flux ratio recovery].

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“…A similar strategy has been successfully used for a DSSC in which TiO 2 also serves as the ETL material. [ 102 ] With the color‐tunable mesoporous Bragg stack counter electrode, the resulted solid‐state DSSC showed a PCE higher than that of the cell with conventional electrodes, as high as 7.1%. However, the advantages and disadvantages of this method against the coating on glass have not yet been fully clarified in the literature.…”

Section: Colored Photovoltaic Technologiesmentioning

confidence: 99%

Transparent and Colored Solar Photovoltaics for Building Integration

Yang

et al. 2021

Solar RRL

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Building‐integrated photovoltaics (BIPVs) stand as a promising solution to provide renewable electricity for achieving zero‐energy buildings, although still hindered from large‐scale implementations due to the difficulty of traditional photovoltaic modules in meeting the standards and aesthetics of architectural materials. The emergence of new photovoltaic materials and devices could pave the way for the future through offering diversity and tunability in colors and transparency along with comparable performance. Herein the recent advances in BIPVs are discussed, starting from an overview of various photovoltaic technologies regarding their material characteristics, state of the art, and adaptability to the built environment. The transparent and colored photovoltaic technologies are then respectively emphasized, concerning design principles, theoretical analysis, technical routes, and corresponding demonstration studies. The various strategies, including the materials and structures adopted to modify the transparency and color of solar cells, are highlighted. Finally, the challenges and future perspectives are addressed, followed by an outlook on factors that are critical for large‐scale implementation of BIPVs in the future.

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Structural color-tunable mesoporous bragg stack layers based on graft copolymer self-assembly for high-efficiency solid-state dye-sensitized solar cells

Cited by 14 publications

References 62 publications

Insight into Charge Separation in WO₃/BiVO₄ Heterojunction for Solar Water Splitting

Insight into Charge Separation in WO₃/BiVO₄ Heterojunction for Solar Water Splitting

Ultrafiltration membranes based on hybrids of an amphiphilic graft copolymer and titanium isopropoxide

Transparent and Colored Solar Photovoltaics for Building Integration

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Structural color-tunable mesoporous bragg stack layers based on graft copolymer self-assembly for high-efficiency solid-state dye-sensitized solar cells

Cited by 14 publications

References 62 publications

Insight into Charge Separation in WO3/BiVO4 Heterojunction for Solar Water Splitting

Insight into Charge Separation in WO3/BiVO4 Heterojunction for Solar Water Splitting

Ultrafiltration membranes based on hybrids of an amphiphilic graft copolymer and titanium isopropoxide

Transparent and Colored Solar Photovoltaics for Building Integration

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Product

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About

Insight into Charge Separation in WO₃/BiVO₄ Heterojunction for Solar Water Splitting

Insight into Charge Separation in WO₃/BiVO₄ Heterojunction for Solar Water Splitting