Nanocellulose and Nanochitin Cryogels Improve the Efficiency of Dye Solar Cells

Research output: Contribution to journalArticle

Standard

Harvard

APA

Vancouver

Author

Bibtex - Download

@article{f5612b740ade4a68ab4d5c3c5426a448,
title = "Nanocellulose and Nanochitin Cryogels Improve the Efficiency of Dye Solar Cells",
abstract = "Biobased cryogel membranes were applied as electrolyte holders in dye solar cells (DSC) while facilitating carrier transport during operation. They also improved device performance and stability. For this purpose, cellulose nanofibers (CNF), TEMPO-oxidized CNF (TOCNF), bacterial cellulose (BC), and chitin nanofibers (ChNF) were investigated. The proposed materials and protocols for incorporating the electrolyte, via simple casting, avoided the typical problems associated with injection of the electrolyte through filling holes, a major difficulty especially in manufacturing large area cells. Owing to the fact that cryogel membranes did not require any orifice for injection, they were effective in minimizing leakage and in retaining liquid electrolyte. The results indicated the reduction of performance losses compared to conventional electrolyte filling, likely due to the better spatial distribution of electrolyte. DSCs based on BC cryogels had an initially higher performance and similar stability compared to those of the reference cells. When compared to reference cells, CNF and ChNF cryogels produced higher initial performance, but they underwent a faster degradation. The difference in stability was attributed to the effect of residual components, including lignin in CNF and proteins in ChNF, as demonstrated in bleaching experiments. TOCNF indicated a relatively poor performance, most likely because of residual aldehydes. Overall, we offer a comprehensive evaluation based on current-voltage (IV) profiles under simulated sunlight, incident photon-to-charge carrier efficiency (IPCE), electrochemical impedance spectroscopy (EIS), and color image processing, together with accelerated DSC stability tests, to unveil the effects of new membrane-based assembly. Our results give guidelines for future developments related in particular to the effects of the tested biomaterials on device stability.",
keywords = "biomaterial, cellulose, membrane, photovoltaics, upscaling",
author = "Aapo Poskela and Kati Miettunen and Maryam Borghei and Jaana Vapaavuori and Greca, {Luiz G.} and Janika Lehtonen and Katariina Solin and Mariko Ago and Lund, {Peter D.} and Rojas, {Orlando J.}",
year = "2019",
month = "6",
day = "17",
doi = "10.1021/acssuschemeng.8b06501",
language = "English",
volume = "7",
pages = "10257--10265",
journal = "ACS Sustainable Chemistry and Engineering",
issn = "2168-0485",
publisher = "AMERICAN CHEMICAL SOCIETY",
number = "12",

}

RIS - Download

TY - JOUR

T1 - Nanocellulose and Nanochitin Cryogels Improve the Efficiency of Dye Solar Cells

AU - Poskela, Aapo

AU - Miettunen, Kati

AU - Borghei, Maryam

AU - Vapaavuori, Jaana

AU - Greca, Luiz G.

AU - Lehtonen, Janika

AU - Solin, Katariina

AU - Ago, Mariko

AU - Lund, Peter D.

AU - Rojas, Orlando J.

PY - 2019/6/17

Y1 - 2019/6/17

N2 - Biobased cryogel membranes were applied as electrolyte holders in dye solar cells (DSC) while facilitating carrier transport during operation. They also improved device performance and stability. For this purpose, cellulose nanofibers (CNF), TEMPO-oxidized CNF (TOCNF), bacterial cellulose (BC), and chitin nanofibers (ChNF) were investigated. The proposed materials and protocols for incorporating the electrolyte, via simple casting, avoided the typical problems associated with injection of the electrolyte through filling holes, a major difficulty especially in manufacturing large area cells. Owing to the fact that cryogel membranes did not require any orifice for injection, they were effective in minimizing leakage and in retaining liquid electrolyte. The results indicated the reduction of performance losses compared to conventional electrolyte filling, likely due to the better spatial distribution of electrolyte. DSCs based on BC cryogels had an initially higher performance and similar stability compared to those of the reference cells. When compared to reference cells, CNF and ChNF cryogels produced higher initial performance, but they underwent a faster degradation. The difference in stability was attributed to the effect of residual components, including lignin in CNF and proteins in ChNF, as demonstrated in bleaching experiments. TOCNF indicated a relatively poor performance, most likely because of residual aldehydes. Overall, we offer a comprehensive evaluation based on current-voltage (IV) profiles under simulated sunlight, incident photon-to-charge carrier efficiency (IPCE), electrochemical impedance spectroscopy (EIS), and color image processing, together with accelerated DSC stability tests, to unveil the effects of new membrane-based assembly. Our results give guidelines for future developments related in particular to the effects of the tested biomaterials on device stability.

AB - Biobased cryogel membranes were applied as electrolyte holders in dye solar cells (DSC) while facilitating carrier transport during operation. They also improved device performance and stability. For this purpose, cellulose nanofibers (CNF), TEMPO-oxidized CNF (TOCNF), bacterial cellulose (BC), and chitin nanofibers (ChNF) were investigated. The proposed materials and protocols for incorporating the electrolyte, via simple casting, avoided the typical problems associated with injection of the electrolyte through filling holes, a major difficulty especially in manufacturing large area cells. Owing to the fact that cryogel membranes did not require any orifice for injection, they were effective in minimizing leakage and in retaining liquid electrolyte. The results indicated the reduction of performance losses compared to conventional electrolyte filling, likely due to the better spatial distribution of electrolyte. DSCs based on BC cryogels had an initially higher performance and similar stability compared to those of the reference cells. When compared to reference cells, CNF and ChNF cryogels produced higher initial performance, but they underwent a faster degradation. The difference in stability was attributed to the effect of residual components, including lignin in CNF and proteins in ChNF, as demonstrated in bleaching experiments. TOCNF indicated a relatively poor performance, most likely because of residual aldehydes. Overall, we offer a comprehensive evaluation based on current-voltage (IV) profiles under simulated sunlight, incident photon-to-charge carrier efficiency (IPCE), electrochemical impedance spectroscopy (EIS), and color image processing, together with accelerated DSC stability tests, to unveil the effects of new membrane-based assembly. Our results give guidelines for future developments related in particular to the effects of the tested biomaterials on device stability.

KW - biomaterial

KW - cellulose

KW - membrane

KW - photovoltaics

KW - upscaling

UR - http://www.scopus.com/inward/record.url?scp=85067079428&partnerID=8YFLogxK

U2 - 10.1021/acssuschemeng.8b06501

DO - 10.1021/acssuschemeng.8b06501

M3 - Article

VL - 7

SP - 10257

EP - 10265

JO - ACS Sustainable Chemistry and Engineering

JF - ACS Sustainable Chemistry and Engineering

SN - 2168-0485

IS - 12

ER -

ID: 35181456