Improvement in stability of bilayer organic solar cells using an ultra-thin Au layer

Saeed Saleh Ardestani; Rasul Ajeian; Moosa Nakhaee Badrabadi; Mohammad Tavakkoli

doi:10.1016/j.solmat.2012.12.039

Improvement in stability of bilayer organic solar cells using an ultra-thin Au layer

Saeed Saleh Ardestani^*, Rasul Ajeian, Moosa Nakhaee Badrabadi, Mohammad Tavakkoli

^*Corresponding author for this work

Not published at Aalto University

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

9 Citations (Scopus)

Abstract

In order to improve the stability of organic solar cells based on CuPc/C₆₀ planar heterojunction, an ultra-thin layer of Au (∼2 nm) is inserted between CuPc and PEDOT:PSS. Although, short circuit current density (J_sc) and open circuit voltage (V_oc) of the device containing Au layer are less than those of the Au-free one, it has comparable power conversion efficiency (η_p) owing to its higher fill factor (FF). In addition, this ultra-thin Au layer enhances the stability of the device significantly. After a month under ambient condition, the device with indium thin oxide (ITO)/PEDOT:PSS/Au anode reaches 67% of its initial η_p value, while the η_p of the cell with ITO/PEDOT:PSS anode drops to less than half of its initial value. The improvement in stability is ascribed to the more durable Au/CuPc interface in contrast to the PEDOT:PSS/CuPc interface.

Original language	English
Pages (from-to)	107-111
Number of pages	5
Journal	Solar Energy Materials and Solar Cells
Volume	111
DOIs	https://doi.org/10.1016/j.solmat.2012.12.039
Publication status	Published - 2013
MoE publication type	A1 Journal article-refereed

Keywords

Au layer
Organic solar cells
PEDOT:PSS
Stability

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title = "Improvement in stability of bilayer organic solar cells using an ultra-thin Au layer",

abstract = "In order to improve the stability of organic solar cells based on CuPc/C60 planar heterojunction, an ultra-thin layer of Au (∼2 nm) is inserted between CuPc and PEDOT:PSS. Although, short circuit current density (Jsc) and open circuit voltage (Voc) of the device containing Au layer are less than those of the Au-free one, it has comparable power conversion efficiency (ηp) owing to its higher fill factor (FF). In addition, this ultra-thin Au layer enhances the stability of the device significantly. After a month under ambient condition, the device with indium thin oxide (ITO)/PEDOT:PSS/Au anode reaches 67% of its initial ηp value, while the ηp of the cell with ITO/PEDOT:PSS anode drops to less than half of its initial value. The improvement in stability is ascribed to the more durable Au/CuPc interface in contrast to the PEDOT:PSS/CuPc interface.",

keywords = "Au layer, Organic solar cells, PEDOT:PSS, Stability",

author = "{Saleh Ardestani}, Saeed and Rasul Ajeian and {Nakhaee Badrabadi}, Moosa and Mohammad Tavakkoli",

year = "2013",

doi = "10.1016/j.solmat.2012.12.039",

language = "English",

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journal = "Solar Energy Materials and Solar Cells",

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T1 - Improvement in stability of bilayer organic solar cells using an ultra-thin Au layer

AU - Saleh Ardestani, Saeed

AU - Ajeian, Rasul

AU - Nakhaee Badrabadi, Moosa

AU - Tavakkoli, Mohammad

PY - 2013

Y1 - 2013

N2 - In order to improve the stability of organic solar cells based on CuPc/C60 planar heterojunction, an ultra-thin layer of Au (∼2 nm) is inserted between CuPc and PEDOT:PSS. Although, short circuit current density (Jsc) and open circuit voltage (Voc) of the device containing Au layer are less than those of the Au-free one, it has comparable power conversion efficiency (ηp) owing to its higher fill factor (FF). In addition, this ultra-thin Au layer enhances the stability of the device significantly. After a month under ambient condition, the device with indium thin oxide (ITO)/PEDOT:PSS/Au anode reaches 67% of its initial ηp value, while the ηp of the cell with ITO/PEDOT:PSS anode drops to less than half of its initial value. The improvement in stability is ascribed to the more durable Au/CuPc interface in contrast to the PEDOT:PSS/CuPc interface.

AB - In order to improve the stability of organic solar cells based on CuPc/C60 planar heterojunction, an ultra-thin layer of Au (∼2 nm) is inserted between CuPc and PEDOT:PSS. Although, short circuit current density (Jsc) and open circuit voltage (Voc) of the device containing Au layer are less than those of the Au-free one, it has comparable power conversion efficiency (ηp) owing to its higher fill factor (FF). In addition, this ultra-thin Au layer enhances the stability of the device significantly. After a month under ambient condition, the device with indium thin oxide (ITO)/PEDOT:PSS/Au anode reaches 67% of its initial ηp value, while the ηp of the cell with ITO/PEDOT:PSS anode drops to less than half of its initial value. The improvement in stability is ascribed to the more durable Au/CuPc interface in contrast to the PEDOT:PSS/CuPc interface.

KW - Au layer

KW - Organic solar cells

KW - PEDOT:PSS

KW - Stability

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