Charge transfer modification of inverted planar perovskite solar cells by NiOx/Sr:NiOx bilayer hole transport layer

doi:10.1088/1674-1056/ac1fda

中国物理B ›› 2022, Vol. 31 ›› Issue (3): 38801-038801.doi: 10.1088/1674-1056/ac1fda

Charge transfer modification of inverted planar perovskite solar cells by NiO_x/Sr:NiO_x bilayer hole transport layer

Qiaopeng Cui(崔翘鹏)¹, Liang Zhao(赵亮)¹, Xuewen Sun(孙学文)¹, Qiannan Yao(姚倩楠)¹, Sheng Huang(黄胜)^1,†, Lei Zhu(朱磊)², Yulong Zhao(赵宇龙)¹, Jian Song(宋健)^1,‡, and Yinghuai Qiang(强颖怀)¹

1 The Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China;
2 Advanced Analysis&Computation Center, China University of Mining and Technology, Xuzhou 221116, China

收稿日期:2021-07-16 修回日期:2021-08-18 接受日期:2021-08-22 出版日期:2022-02-22 发布日期:2022-02-14
通讯作者: Sheng Huang, Jian Song E-mail:huangsheng@cumt.edu.cn;jsoong@cumt.edu.cn
基金资助:
This work was supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2021QN1110).

Charge transfer modification of inverted planar perovskite solar cells by NiO_x/Sr:NiO_x bilayer hole transport layer

1 The Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China;
2 Advanced Analysis&Computation Center, China University of Mining and Technology, Xuzhou 221116, China

Received:2021-07-16 Revised:2021-08-18 Accepted:2021-08-22 Online:2022-02-22 Published:2022-02-14
Contact: Sheng Huang, Jian Song E-mail:huangsheng@cumt.edu.cn;jsoong@cumt.edu.cn
Supported by:
This work was supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2021QN1110).

1. 2022-038801-SI.pdf(599KB)

摘要/Abstract

摘要： Perovskite solar cells (PSCs) are the most promising commercial photoelectric conversion technology in the future. The planar p-i-n structure cells have advantages in negligible hysteresis, low temperature preparation and excellent stability. However, for inverted planar PSCs, the non-radiative recombination at the interface is an important reason that impedes the charge transfer and improvement of power conversion efficiency. Having a homogeneous, compact, and energy-level-matched charge transport layer is the key to reducing non-radiative recombination. In our study, NiO$_{x}$/Sr:NiO$_{x}$ bilayer hole transport layer (HTL) improves the holes transmission of NiO$_{x}$ based HTL, reduces the recombination in the interface between perovskite and HTL layer and improves the device performance. The bilayer HTL enhances the hole transfer by forming a driving force of an electric field and further improves $J_{\rm sc}$. As a result, the device has a power conversion efficiency of 18.44%, a short circuit current density of 22.81 mA$\cdot$cm$^{-2}$ and a fill factor of 0.80. Compared to the pristine PSCs, there are certain improvements of optical parameters. This method provides a new idea for the future design of novel hole transport layers and the development of high-performance solar cells.

关键词: perovskite solar cells, nickel oxide, Sr doping, bilayer hole transport layer

Abstract: Perovskite solar cells (PSCs) are the most promising commercial photoelectric conversion technology in the future. The planar p-i-n structure cells have advantages in negligible hysteresis, low temperature preparation and excellent stability. However, for inverted planar PSCs, the non-radiative recombination at the interface is an important reason that impedes the charge transfer and improvement of power conversion efficiency. Having a homogeneous, compact, and energy-level-matched charge transport layer is the key to reducing non-radiative recombination. In our study, NiO$_{x}$/Sr:NiO$_{x}$ bilayer hole transport layer (HTL) improves the holes transmission of NiO$_{x}$ based HTL, reduces the recombination in the interface between perovskite and HTL layer and improves the device performance. The bilayer HTL enhances the hole transfer by forming a driving force of an electric field and further improves $J_{\rm sc}$. As a result, the device has a power conversion efficiency of 18.44%, a short circuit current density of 22.81 mA$\cdot$cm$^{-2}$ and a fill factor of 0.80. Compared to the pristine PSCs, there are certain improvements of optical parameters. This method provides a new idea for the future design of novel hole transport layers and the development of high-performance solar cells.

Key words: perovskite solar cells, nickel oxide, Sr doping, bilayer hole transport layer

中图分类号: (Solar cells (photovoltaics))

88.40.H-

88.40.hj (Efficiency and performance of solar cells) 78.56.-a (Photoconduction and photovoltaic effects)

Qiaopeng Cui(崔翘鹏), Liang Zhao(赵亮), Xuewen Sun(孙学文), Qiannan Yao(姚倩楠), Sheng Huang(黄胜), Lei Zhu(朱磊), Yulong Zhao(赵宇龙), Jian Song(宋健), and Yinghuai Qiang(强颖怀). Charge transfer modification of inverted planar perovskite solar cells by NiO_x/Sr:NiO_x bilayer hole transport layer[J]. 中国物理B, 2022, 31(3): 38801-038801.

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Charge transfer modification of inverted planar perovskite solar cells by NiO_x/Sr:NiO_x bilayer hole transport layer

Charge transfer modification of inverted planar perovskite solar cells by NiO_x/Sr:NiO_x bilayer hole transport layer

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