Analysis of the improved thermal stability of Al-doped ZnO-adopted organic solar cells

Jaehoon Kim; Yeonkyung Lee; Jun Young Kim; Hyung Jun Song; Jiyun Song; Hyunho Lee; Changhee Lee

doi:10.1063/5.0032729

Analysis of the improved thermal stability of Al-doped ZnO-adopted organic solar cells

Jaehoon Kim
, Yeonkyung Lee
, Jun Young Kim
, Hyung Jun Song
, Jiyun Song
, Hyunho Lee
, Changhee Lee

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

8 Scopus citations

Abstract

The stable performance of organic solar cells (OSCs) at high temperatures is a critical issue for their commercialization. Although a few studies have reported the improved stability of OSCs that adopted Al-doped ZnO (AZO) as an electron transport layer (ETL), systematic research that validates the origins of this improvement has been lacking. In this work, we investigated the underlying mechanism for the improved stability of an OSC with AZO. By adopting AZO, the power conversion efficiency reached 8.65% and retained 70% of its initial value at 85 °C for 6 h, which was an increase in stability of 46% compared to that of an OSC with pristine ZnO. We found that the improved stability of the OSC with AZO originated from the decrease in oxygen defects and the space-charge limited current region through trap-related analyses and the Mott-Gurney law. Therefore, the results supported the enhanced thermal stability of OSCs that incorporated AZO as an ETL.

Original language	English
Article number	023302
Journal	Applied Physics Letters
Volume	118
Issue number	2
DOIs	https://doi.org/10.1063/5.0032729
State	Published - 11 Jan 2021

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title = "Analysis of the improved thermal stability of Al-doped ZnO-adopted organic solar cells",

abstract = "The stable performance of organic solar cells (OSCs) at high temperatures is a critical issue for their commercialization. Although a few studies have reported the improved stability of OSCs that adopted Al-doped ZnO (AZO) as an electron transport layer (ETL), systematic research that validates the origins of this improvement has been lacking. In this work, we investigated the underlying mechanism for the improved stability of an OSC with AZO. By adopting AZO, the power conversion efficiency reached 8.65\% and retained 70\% of its initial value at 85 °C for 6 h, which was an increase in stability of 46\% compared to that of an OSC with pristine ZnO. We found that the improved stability of the OSC with AZO originated from the decrease in oxygen defects and the space-charge limited current region through trap-related analyses and the Mott-Gurney law. Therefore, the results supported the enhanced thermal stability of OSCs that incorporated AZO as an ETL.",

author = "Jaehoon Kim and Yeonkyung Lee and Kim, \{Jun Young\} and Song, \{Hyung Jun\} and Jiyun Song and Hyunho Lee and Changhee Lee",

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T1 - Analysis of the improved thermal stability of Al-doped ZnO-adopted organic solar cells

AU - Kim, Jaehoon

AU - Lee, Yeonkyung

AU - Kim, Jun Young

AU - Song, Hyung Jun

AU - Song, Jiyun

AU - Lee, Hyunho

AU - Lee, Changhee

PY - 2021/1/11

Y1 - 2021/1/11

N2 - The stable performance of organic solar cells (OSCs) at high temperatures is a critical issue for their commercialization. Although a few studies have reported the improved stability of OSCs that adopted Al-doped ZnO (AZO) as an electron transport layer (ETL), systematic research that validates the origins of this improvement has been lacking. In this work, we investigated the underlying mechanism for the improved stability of an OSC with AZO. By adopting AZO, the power conversion efficiency reached 8.65% and retained 70% of its initial value at 85 °C for 6 h, which was an increase in stability of 46% compared to that of an OSC with pristine ZnO. We found that the improved stability of the OSC with AZO originated from the decrease in oxygen defects and the space-charge limited current region through trap-related analyses and the Mott-Gurney law. Therefore, the results supported the enhanced thermal stability of OSCs that incorporated AZO as an ETL.

AB - The stable performance of organic solar cells (OSCs) at high temperatures is a critical issue for their commercialization. Although a few studies have reported the improved stability of OSCs that adopted Al-doped ZnO (AZO) as an electron transport layer (ETL), systematic research that validates the origins of this improvement has been lacking. In this work, we investigated the underlying mechanism for the improved stability of an OSC with AZO. By adopting AZO, the power conversion efficiency reached 8.65% and retained 70% of its initial value at 85 °C for 6 h, which was an increase in stability of 46% compared to that of an OSC with pristine ZnO. We found that the improved stability of the OSC with AZO originated from the decrease in oxygen defects and the space-charge limited current region through trap-related analyses and the Mott-Gurney law. Therefore, the results supported the enhanced thermal stability of OSCs that incorporated AZO as an ETL.

UR - https://www.scopus.com/pages/publications/85099497857

U2 - 10.1063/5.0032729

DO - 10.1063/5.0032729

M3 - Article

AN - SCOPUS:85099497857

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VL - 118

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 2

M1 - 023302

ER -

Analysis of the improved thermal stability of Al-doped ZnO-adopted organic solar cells

Abstract

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