Enhanced UV stability of perovskite solar cells with a SrO interlayer

Sang Won Lee; Seongtak Kim; Soohyun Bae; Kyungjin Cho; Taewon Chung; Jae Keun Hwang; Inseol Song; Wonkyu Lee; Sungeun Park; Jaebong Jung; Jihun Chun; Yoon Jung Lee; Yeon Ji Moon; Haeseok Lee; Donghwan Kim; Chan Bin Mo; Yoon Mook Kang

doi:10.1016/j.orgel.2018.09.019

Enhanced UV stability of perovskite solar cells with a SrO interlayer

Sang Won Lee, Seongtak Kim, Soohyun Bae, Kyungjin Cho, Taewon Chung, Jae Keun Hwang, Inseol Song, Wonkyu Lee, Sungeun Park, Jaebong Jung, Jihun Chun, Yoon Jung Lee, Yeon Ji Moon, Haeseok Lee, Donghwan Kim, Chan Bin Mo, Yoon Mook Kang

Research output: Contribution to journal › Article

8 Citations (Scopus)

Abstract

We investigated strontium oxide (SrO) as an interlayer material to enhance the UV stability of a CH₃NH₃PbI₃ perovskite solar cell. Moisture and over 400 nm wavelength of light were excluded to investigate the effect of UV light only. Two different interlayer fabrication processes were examined to optimize the performance of this solar cell. Devices fabricated by dipping for 30 min in SrO solution exhibited photoconversion efficiencies of 15.5%, whereas those fabricated with 60-min dipping showed photoconversion efficiencies of 15% and exhibited local Sr agglomeration. Devices with SrO displayed lower initial efficiencies than those without any SrO layer (17.6%), However, a device without SrO retained only 34.4% of its initial efficiency after 100 h of UV exposure. In contrast, SrO-incorporated devices retained almost 60.0% of their initial efficiency. Severe μ-PL mapping intensity degradation was observed in devices that did not include the interlayer, but no degradation was observed in those with the SrO interlayer. This can be attributed to the passivation of the degradation sites by SrO.

Original language	English
Pages (from-to)	343-348
Number of pages	6
Journal	Organic Electronics: physics, materials, applications
Volume	63
DOIs	https://doi.org/10.1016/j.orgel.2018.09.019
Publication status	Published - 2018 Dec 1

Keywords

Interface passivation
Micro-photoluminescence
Perovskite solar cell
Strontium oxide
UV stability

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Chemistry(all)
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

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Lee, S. W., Kim, S., Bae, S., Cho, K., Chung, T., Hwang, J. K., Song, I., Lee, W., Park, S., Jung, J., Chun, J., Lee, Y. J., Moon, Y. J., Lee, H., Kim, D., Mo, C. B., & Kang, Y. M. (2018). Enhanced UV stability of perovskite solar cells with a SrO interlayer. Organic Electronics: physics, materials, applications, 63, 343-348. https://doi.org/10.1016/j.orgel.2018.09.019

Enhanced UV stability of perovskite solar cells with a SrO interlayer. / Lee, Sang Won; Kim, Seongtak; Bae, Soohyun; Cho, Kyungjin; Chung, Taewon; Hwang, Jae Keun; Song, Inseol; Lee, Wonkyu; Park, Sungeun; Jung, Jaebong; Chun, Jihun; Lee, Yoon Jung; Moon, Yeon Ji; Lee, Haeseok ; Kim, Donghwan; Mo, Chan Bin; Kang, Yoon Mook.

In: Organic Electronics: physics, materials, applications, Vol. 63, 01.12.2018, p. 343-348.

Research output: Contribution to journal › Article

Lee, Sang Won ; Kim, Seongtak ; Bae, Soohyun ; Cho, Kyungjin ; Chung, Taewon ; Hwang, Jae Keun ; Song, Inseol ; Lee, Wonkyu ; Park, Sungeun ; Jung, Jaebong ; Chun, Jihun ; Lee, Yoon Jung ; Moon, Yeon Ji ; Lee, Haeseok ; Kim, Donghwan ; Mo, Chan Bin ; Kang, Yoon Mook. / Enhanced UV stability of perovskite solar cells with a SrO interlayer. In: Organic Electronics: physics, materials, applications. 2018 ; Vol. 63. pp. 343-348.

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abstract = "We investigated strontium oxide (SrO) as an interlayer material to enhance the UV stability of a CH3NH3PbI3 perovskite solar cell. Moisture and over 400 nm wavelength of light were excluded to investigate the effect of UV light only. Two different interlayer fabrication processes were examined to optimize the performance of this solar cell. Devices fabricated by dipping for 30 min in SrO solution exhibited photoconversion efficiencies of 15.5%, whereas those fabricated with 60-min dipping showed photoconversion efficiencies of 15% and exhibited local Sr agglomeration. Devices with SrO displayed lower initial efficiencies than those without any SrO layer (17.6%), However, a device without SrO retained only 34.4% of its initial efficiency after 100 h of UV exposure. In contrast, SrO-incorporated devices retained almost 60.0% of their initial efficiency. Severe μ-PL mapping intensity degradation was observed in devices that did not include the interlayer, but no degradation was observed in those with the SrO interlayer. This can be attributed to the passivation of the degradation sites by SrO.",

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AU - Kim, Seongtak

AU - Bae, Soohyun

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AU - Chung, Taewon

AU - Hwang, Jae Keun

AU - Song, Inseol

AU - Lee, Wonkyu

AU - Park, Sungeun

AU - Jung, Jaebong

AU - Chun, Jihun

AU - Lee, Yoon Jung

AU - Moon, Yeon Ji

AU - Lee, Haeseok

AU - Kim, Donghwan

AU - Mo, Chan Bin

AU - Kang, Yoon Mook

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AB - We investigated strontium oxide (SrO) as an interlayer material to enhance the UV stability of a CH3NH3PbI3 perovskite solar cell. Moisture and over 400 nm wavelength of light were excluded to investigate the effect of UV light only. Two different interlayer fabrication processes were examined to optimize the performance of this solar cell. Devices fabricated by dipping for 30 min in SrO solution exhibited photoconversion efficiencies of 15.5%, whereas those fabricated with 60-min dipping showed photoconversion efficiencies of 15% and exhibited local Sr agglomeration. Devices with SrO displayed lower initial efficiencies than those without any SrO layer (17.6%), However, a device without SrO retained only 34.4% of its initial efficiency after 100 h of UV exposure. In contrast, SrO-incorporated devices retained almost 60.0% of their initial efficiency. Severe μ-PL mapping intensity degradation was observed in devices that did not include the interlayer, but no degradation was observed in those with the SrO interlayer. This can be attributed to the passivation of the degradation sites by SrO.

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