Record Efficiency Stable Flexible Perovskite Solar Cell Using Effective Additive Assistant Strategy

Jiangshan Feng, Xuejie Zhu, Zhou Yang, Xiaorong Zhang, Jinzhi Niu, Ziyu Wang, Shengnan Zuo, Shashank Priya, Shengzhong (Frank) Liu, Dong Yang

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

Even though the power conversion efficiency (PCE) of rigid perovskite solar cells is increased to 22.7%, the PCE of flexible perovskite solar cells (F-PSCs) is still lower. Here, a novel dimethyl sulfide (DS) additive is developed to effectively improve the performance of the F-PSCs. Fourier transform infrared spectroscopy reveals that the DS additive reacts with Pb2+ to form a chelated intermediate, which significantly slows down the crystallization rate, leading to large grain size and good crystallinity for the resultant perovskite film. In fact, the trap density of the perovskite film prepared using the DS additive is reduced by an order of magnitude compared to the one without it, demonstrating that the additive effectively retards transformation kinetics during the thin film formation process. As a result, the PCE of the flexible devices increases to 18.40%, with good mechanical tolerance, the highest reported so far for the F-PSCs. Meanwhile, the environmental stability of the F-PSCs significantly enhances by 1.72 times compared to the device without the additive, likely due to the large grain size that suppresses perovskite degradation at grain boundaries. The present strategy will help guide development of high efficiency F-PSCs for practical applications.

Original languageEnglish (US)
Article number1801418
JournalAdvanced Materials
Volume30
Issue number35
DOIs
StatePublished - Aug 29 2018

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Perovskite
Conversion efficiency
Crystallization
Fourier transform infrared spectroscopy
Perovskite solar cells
Grain boundaries
Degradation
Thin films
Kinetics
Sulfides
dimethyl sulfide
perovskite

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Feng, Jiangshan ; Zhu, Xuejie ; Yang, Zhou ; Zhang, Xiaorong ; Niu, Jinzhi ; Wang, Ziyu ; Zuo, Shengnan ; Priya, Shashank ; Liu, Shengzhong (Frank) ; Yang, Dong. / Record Efficiency Stable Flexible Perovskite Solar Cell Using Effective Additive Assistant Strategy. In: Advanced Materials. 2018 ; Vol. 30, No. 35.
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abstract = "Even though the power conversion efficiency (PCE) of rigid perovskite solar cells is increased to 22.7{\%}, the PCE of flexible perovskite solar cells (F-PSCs) is still lower. Here, a novel dimethyl sulfide (DS) additive is developed to effectively improve the performance of the F-PSCs. Fourier transform infrared spectroscopy reveals that the DS additive reacts with Pb2+ to form a chelated intermediate, which significantly slows down the crystallization rate, leading to large grain size and good crystallinity for the resultant perovskite film. In fact, the trap density of the perovskite film prepared using the DS additive is reduced by an order of magnitude compared to the one without it, demonstrating that the additive effectively retards transformation kinetics during the thin film formation process. As a result, the PCE of the flexible devices increases to 18.40{\%}, with good mechanical tolerance, the highest reported so far for the F-PSCs. Meanwhile, the environmental stability of the F-PSCs significantly enhances by 1.72 times compared to the device without the additive, likely due to the large grain size that suppresses perovskite degradation at grain boundaries. The present strategy will help guide development of high efficiency F-PSCs for practical applications.",
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Record Efficiency Stable Flexible Perovskite Solar Cell Using Effective Additive Assistant Strategy. / Feng, Jiangshan; Zhu, Xuejie; Yang, Zhou; Zhang, Xiaorong; Niu, Jinzhi; Wang, Ziyu; Zuo, Shengnan; Priya, Shashank; Liu, Shengzhong (Frank); Yang, Dong.

In: Advanced Materials, Vol. 30, No. 35, 1801418, 29.08.2018.

Research output: Contribution to journalArticle

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AU - Feng, Jiangshan

AU - Zhu, Xuejie

AU - Yang, Zhou

AU - Zhang, Xiaorong

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AU - Wang, Ziyu

AU - Zuo, Shengnan

AU - Priya, Shashank

AU - Liu, Shengzhong (Frank)

AU - Yang, Dong

PY - 2018/8/29

Y1 - 2018/8/29

N2 - Even though the power conversion efficiency (PCE) of rigid perovskite solar cells is increased to 22.7%, the PCE of flexible perovskite solar cells (F-PSCs) is still lower. Here, a novel dimethyl sulfide (DS) additive is developed to effectively improve the performance of the F-PSCs. Fourier transform infrared spectroscopy reveals that the DS additive reacts with Pb2+ to form a chelated intermediate, which significantly slows down the crystallization rate, leading to large grain size and good crystallinity for the resultant perovskite film. In fact, the trap density of the perovskite film prepared using the DS additive is reduced by an order of magnitude compared to the one without it, demonstrating that the additive effectively retards transformation kinetics during the thin film formation process. As a result, the PCE of the flexible devices increases to 18.40%, with good mechanical tolerance, the highest reported so far for the F-PSCs. Meanwhile, the environmental stability of the F-PSCs significantly enhances by 1.72 times compared to the device without the additive, likely due to the large grain size that suppresses perovskite degradation at grain boundaries. The present strategy will help guide development of high efficiency F-PSCs for practical applications.

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