Luminescent Downshifting by Photo-Induced Sol-Gel Hybrid Coatings

Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material Processing

Diego Pintossi, Giovanni Iannaccone, Alessia Colombo, Federico Bella, Marja Välimäki, Kaisa Leena Väisänen, Jukka Hast, Marinella Levi, Claudio Gerbaldi, Claudia Dragonetti, Stefano Turri, Gianmarco Griffini

Research output: Contribution to journalArticleScientificpeer-review

40 Citations (Scopus)

Abstract

A novel high-durability multifunctional organic–inorganic hybrid coating material is presented in this work as luminescent down-shifting (LDS) host matrix system for flexible organic photovoltaic (OPV) devices. Such new LDS coating is obtained by incorporating a convenient fluorescent organic dye in an appropriately functionalized fluoropolymeric resin that can be readily crosslinked by means of a dual-cure mechanism with a single-step ambient-temperature photo-induced sol–gel process. Due to its peculiar characteristics, the newly proposed system may be readily implemented in heat-sensitive flexible devices. By carefully tuning the amount of organic fluorophore in the hybrid coating material, a maximum increase in power conversion efficiency exceeding 4% is achieved on devices incorporating the new LDS layer with respect to control systems. This represents the highest efficiency enhancement reported to date on flexible OPVs by means of a polymer-based LDS layer. In addition, long-term accelerated weathering tests (>550 h) highlight the excellent stability of LDS-coated OPV devices, which can retain 80% of their initial performance, as opposed to the dramatic efficiency decay experienced by control uncoated devices. The approach presented here opens the way to the straightforward incorporation of versatile multifunctional light-managing layers on flexible OPV systems for improved device efficiency and lifetime.

Original languageEnglish
Article number1600288
JournalAdvanced Electronic Materials
Volume2
Issue number11
DOIs
Publication statusPublished - 1 Nov 2016
MoE publication typeA1 Journal article-refereed

Fingerprint

Sol-gels
Coatings
Processing
Fluorophores
Weathering
Temperature
Conversion efficiency
Polymers
Durability
Coloring Agents
Dyes
Resins
Tuning
Control systems
Hot Temperature

Keywords

  • fluorinated materials
  • luminescent downshifting
  • organic dye
  • organic photovoltaics
  • polymer solar cells

Cite this

Pintossi, Diego ; Iannaccone, Giovanni ; Colombo, Alessia ; Bella, Federico ; Välimäki, Marja ; Väisänen, Kaisa Leena ; Hast, Jukka ; Levi, Marinella ; Gerbaldi, Claudio ; Dragonetti, Claudia ; Turri, Stefano ; Griffini, Gianmarco. / Luminescent Downshifting by Photo-Induced Sol-Gel Hybrid Coatings : Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material Processing. In: Advanced Electronic Materials. 2016 ; Vol. 2, No. 11.
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abstract = "A novel high-durability multifunctional organic–inorganic hybrid coating material is presented in this work as luminescent down-shifting (LDS) host matrix system for flexible organic photovoltaic (OPV) devices. Such new LDS coating is obtained by incorporating a convenient fluorescent organic dye in an appropriately functionalized fluoropolymeric resin that can be readily crosslinked by means of a dual-cure mechanism with a single-step ambient-temperature photo-induced sol–gel process. Due to its peculiar characteristics, the newly proposed system may be readily implemented in heat-sensitive flexible devices. By carefully tuning the amount of organic fluorophore in the hybrid coating material, a maximum increase in power conversion efficiency exceeding 4{\%} is achieved on devices incorporating the new LDS layer with respect to control systems. This represents the highest efficiency enhancement reported to date on flexible OPVs by means of a polymer-based LDS layer. In addition, long-term accelerated weathering tests (>550 h) highlight the excellent stability of LDS-coated OPV devices, which can retain 80{\%} of their initial performance, as opposed to the dramatic efficiency decay experienced by control uncoated devices. The approach presented here opens the way to the straightforward incorporation of versatile multifunctional light-managing layers on flexible OPV systems for improved device efficiency and lifetime.",
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Luminescent Downshifting by Photo-Induced Sol-Gel Hybrid Coatings : Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material Processing. / Pintossi, Diego; Iannaccone, Giovanni; Colombo, Alessia; Bella, Federico; Välimäki, Marja; Väisänen, Kaisa Leena; Hast, Jukka; Levi, Marinella; Gerbaldi, Claudio; Dragonetti, Claudia; Turri, Stefano; Griffini, Gianmarco.

In: Advanced Electronic Materials, Vol. 2, No. 11, 1600288, 01.11.2016.

Research output: Contribution to journalArticleScientificpeer-review

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T2 - Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material Processing

AU - Pintossi, Diego

AU - Iannaccone, Giovanni

AU - Colombo, Alessia

AU - Bella, Federico

AU - Välimäki, Marja

AU - Väisänen, Kaisa Leena

AU - Hast, Jukka

AU - Levi, Marinella

AU - Gerbaldi, Claudio

AU - Dragonetti, Claudia

AU - Turri, Stefano

AU - Griffini, Gianmarco

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AB - A novel high-durability multifunctional organic–inorganic hybrid coating material is presented in this work as luminescent down-shifting (LDS) host matrix system for flexible organic photovoltaic (OPV) devices. Such new LDS coating is obtained by incorporating a convenient fluorescent organic dye in an appropriately functionalized fluoropolymeric resin that can be readily crosslinked by means of a dual-cure mechanism with a single-step ambient-temperature photo-induced sol–gel process. Due to its peculiar characteristics, the newly proposed system may be readily implemented in heat-sensitive flexible devices. By carefully tuning the amount of organic fluorophore in the hybrid coating material, a maximum increase in power conversion efficiency exceeding 4% is achieved on devices incorporating the new LDS layer with respect to control systems. This represents the highest efficiency enhancement reported to date on flexible OPVs by means of a polymer-based LDS layer. In addition, long-term accelerated weathering tests (>550 h) highlight the excellent stability of LDS-coated OPV devices, which can retain 80% of their initial performance, as opposed to the dramatic efficiency decay experienced by control uncoated devices. The approach presented here opens the way to the straightforward incorporation of versatile multifunctional light-managing layers on flexible OPV systems for improved device efficiency and lifetime.

KW - fluorinated materials

KW - luminescent downshifting

KW - organic dye

KW - organic photovoltaics

KW - polymer solar cells

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