Mesoporous TiO 2 Bragg Stack Templated by Graft Copolymer for Dye-sensitized Solar Cells

Jung Tae Park; Won Seok Chi; Sang Jin Kim; Daeyeon Lee; Jong Hak Kim

doi:10.1038/srep05505

Mesoporous TiO ₂ Bragg Stack Templated by Graft Copolymer for Dye-sensitized Solar Cells

Jung Tae Park, Won Seok Chi, Sang Jin Kim, Daeyeon Lee, Jong Hak Kim

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

Organized mesoporous TiO ₂ Bragg stacks (om-TiO ₂ BS) consisting of alternating high and low refractive index organized mesoporous TiO ₂ (om-TiO ₂) films were prepared to enhance dye loading, light harvesting, electron transport, and electrolyte pore-infiltration in dye-sensitized solar cells (DSSCs). The om-TiO ₂ films were synthesized via a sol-gel reaction using amphiphilic graft copolymers consisting of poly(vinyl chloride) backbones and poly(oxyethylene methacrylate) side chains, i.e., PVC-g-POEM as templates. To generate high and low index films, the refractive index of om-TiO ₂ film was tuned by controlling the grafting ratio of PVC-g-POEM via atomic transfer radical polymerization (ATRP). A polymerized ionic liquid (PIL)-based DSSC fabricated with a 1.2-μm-thick om-TiO ₂ BS-based photoanode exhibited an efficiency of 4.3%, which is much higher than that of conventional DSSCs with a nanocrystalline TiO ₂ layer (nc-TiO ₂ layer) (1.7%). A PIL-based DSSC with a heterostructured photoanode consisting of 400-nm-thick organized mesoporous TiO ₂ interfacial (om-TiO ₂ IF) layer, 7-μm-thick nc-TiO ₂, and 1.2-μm-thick om-TiO ₂ BS as the bottom, middle and top layers, respectively, exhibited an excellent efficiency of 7.5%, which is much higher than that of nanocrystaline TiO ₂ photoanode (3.5%).

Original language	English
Article number	5505
Journal	Scientific reports
Volume	4
DOIs	https://doi.org/10.1038/srep05505
Publication status	Published - 2014 Jul 1

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation (NRF) grant and funded by the Korean government (MEST) through the Active Polymer Center for Pattern Integration (2007-0056091) and the Core Research Program (2012R1A2A2A02011268). D. L. acknowledges the support of NSF CBET-1234993 and NSF DMR-1055594.

All Science Journal Classification (ASJC) codes

General

Access to Document

10.1038/srep05505

Cite this

@article{756715ba9edd4f89872a8a9c7254b203,

title = "Mesoporous TiO 2 Bragg Stack Templated by Graft Copolymer for Dye-sensitized Solar Cells",

abstract = "Organized mesoporous TiO 2 Bragg stacks (om-TiO 2 BS) consisting of alternating high and low refractive index organized mesoporous TiO 2 (om-TiO 2) films were prepared to enhance dye loading, light harvesting, electron transport, and electrolyte pore-infiltration in dye-sensitized solar cells (DSSCs). The om-TiO 2 films were synthesized via a sol-gel reaction using amphiphilic graft copolymers consisting of poly(vinyl chloride) backbones and poly(oxyethylene methacrylate) side chains, i.e., PVC-g-POEM as templates. To generate high and low index films, the refractive index of om-TiO 2 film was tuned by controlling the grafting ratio of PVC-g-POEM via atomic transfer radical polymerization (ATRP). A polymerized ionic liquid (PIL)-based DSSC fabricated with a 1.2-μm-thick om-TiO 2 BS-based photoanode exhibited an efficiency of 4.3%, which is much higher than that of conventional DSSCs with a nanocrystalline TiO 2 layer (nc-TiO 2 layer) (1.7%). A PIL-based DSSC with a heterostructured photoanode consisting of 400-nm-thick organized mesoporous TiO 2 interfacial (om-TiO 2 IF) layer, 7-μm-thick nc-TiO 2, and 1.2-μm-thick om-TiO 2 BS as the bottom, middle and top layers, respectively, exhibited an excellent efficiency of 7.5%, which is much higher than that of nanocrystaline TiO 2 photoanode (3.5%).",

author = "Park, {Jung Tae} and Chi, {Won Seok} and Kim, {Sang Jin} and Daeyeon Lee and Kim, {Jong Hak}",

note = "Funding Information: This work was supported by a National Research Foundation (NRF) grant and funded by the Korean government (MEST) through the Active Polymer Center for Pattern Integration (2007-0056091) and the Core Research Program (2012R1A2A2A02011268). D. L. acknowledges the support of NSF CBET-1234993 and NSF DMR-1055594.",

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doi = "10.1038/srep05505",

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AU - Lee, Daeyeon

AU - Kim, Jong Hak

N1 - Funding Information: This work was supported by a National Research Foundation (NRF) grant and funded by the Korean government (MEST) through the Active Polymer Center for Pattern Integration (2007-0056091) and the Core Research Program (2012R1A2A2A02011268). D. L. acknowledges the support of NSF CBET-1234993 and NSF DMR-1055594.

PY - 2014/7/1

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N2 - Organized mesoporous TiO 2 Bragg stacks (om-TiO 2 BS) consisting of alternating high and low refractive index organized mesoporous TiO 2 (om-TiO 2) films were prepared to enhance dye loading, light harvesting, electron transport, and electrolyte pore-infiltration in dye-sensitized solar cells (DSSCs). The om-TiO 2 films were synthesized via a sol-gel reaction using amphiphilic graft copolymers consisting of poly(vinyl chloride) backbones and poly(oxyethylene methacrylate) side chains, i.e., PVC-g-POEM as templates. To generate high and low index films, the refractive index of om-TiO 2 film was tuned by controlling the grafting ratio of PVC-g-POEM via atomic transfer radical polymerization (ATRP). A polymerized ionic liquid (PIL)-based DSSC fabricated with a 1.2-μm-thick om-TiO 2 BS-based photoanode exhibited an efficiency of 4.3%, which is much higher than that of conventional DSSCs with a nanocrystalline TiO 2 layer (nc-TiO 2 layer) (1.7%). A PIL-based DSSC with a heterostructured photoanode consisting of 400-nm-thick organized mesoporous TiO 2 interfacial (om-TiO 2 IF) layer, 7-μm-thick nc-TiO 2, and 1.2-μm-thick om-TiO 2 BS as the bottom, middle and top layers, respectively, exhibited an excellent efficiency of 7.5%, which is much higher than that of nanocrystaline TiO 2 photoanode (3.5%).

AB - Organized mesoporous TiO 2 Bragg stacks (om-TiO 2 BS) consisting of alternating high and low refractive index organized mesoporous TiO 2 (om-TiO 2) films were prepared to enhance dye loading, light harvesting, electron transport, and electrolyte pore-infiltration in dye-sensitized solar cells (DSSCs). The om-TiO 2 films were synthesized via a sol-gel reaction using amphiphilic graft copolymers consisting of poly(vinyl chloride) backbones and poly(oxyethylene methacrylate) side chains, i.e., PVC-g-POEM as templates. To generate high and low index films, the refractive index of om-TiO 2 film was tuned by controlling the grafting ratio of PVC-g-POEM via atomic transfer radical polymerization (ATRP). A polymerized ionic liquid (PIL)-based DSSC fabricated with a 1.2-μm-thick om-TiO 2 BS-based photoanode exhibited an efficiency of 4.3%, which is much higher than that of conventional DSSCs with a nanocrystalline TiO 2 layer (nc-TiO 2 layer) (1.7%). A PIL-based DSSC with a heterostructured photoanode consisting of 400-nm-thick organized mesoporous TiO 2 interfacial (om-TiO 2 IF) layer, 7-μm-thick nc-TiO 2, and 1.2-μm-thick om-TiO 2 BS as the bottom, middle and top layers, respectively, exhibited an excellent efficiency of 7.5%, which is much higher than that of nanocrystaline TiO 2 photoanode (3.5%).

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