Potassium-Doped Nickel Oxide as the Hole Transport Layer for Efficient and Stable Inverted Perovskite Solar Cells

Po Chih Chen; Sheng-Hsiung Yang

doi:10.1021/acsaem.9b01200

Potassium-Doped Nickel Oxide as the Hole Transport Layer for Efficient and Stable Inverted Perovskite Solar Cells

Po Chih Chen, Sheng-Hsiung Yang^*

^*Corresponding author for this work

Institute of Lighting and Energy Photonics

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

40 Scopus citations

Abstract

Organic/inorganic hybrid perovskites have received a great deal of attention in solar energy harvest due to their high absorbance in the visible range, long carrier diffusion length, and solution processability. It is extremely important to develop high-quality hole transport layer (HTL) to replace PEDOT:PSS for fabricating inverted perovskite solar cells (PSCs) with high power conversion efficiency (PCE) and device stability. Upon this consideration, we proposed potassium (K)-doped nickel oxide (NiO_x) compact layer via the sol-gel process to improve the conductivity and to modify its work function. Inverted PSCs with the configuration of FTO/K:NiO_x/Cs_0.05FA_0.81MA_0.14Pb(I_0.85Br_0.15)₃/TBABF₄+PCBM/TIPD/Ag were fabricated and evaluated. We found that the device based on 3% K-doped NiO_x showed the best performance with an optimized PCE of 17.05% and a high fill factor of 74%, and it retained about 80% of initial PCE value after 35 days storage. Our results provide a simple and effective approach to fabricate inverted PSCs with high efficiency and long-term stability for future production.

Original language	English
Pages (from-to)	6705-6713
Number of pages	9
Journal	ACS Applied Energy Materials
Volume	2
Issue number	9
DOIs	https://doi.org/10.1021/acsaem.9b01200
State	Published - 23 Sep 2019

Keywords

hole transport layer
inverted perovskite solar cells
nickel oxide
potassium-doped
sol-gel process

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10.1021/acsaem.9b01200

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title = "Potassium-Doped Nickel Oxide as the Hole Transport Layer for Efficient and Stable Inverted Perovskite Solar Cells",

abstract = "Organic/inorganic hybrid perovskites have received a great deal of attention in solar energy harvest due to their high absorbance in the visible range, long carrier diffusion length, and solution processability. It is extremely important to develop high-quality hole transport layer (HTL) to replace PEDOT:PSS for fabricating inverted perovskite solar cells (PSCs) with high power conversion efficiency (PCE) and device stability. Upon this consideration, we proposed potassium (K)-doped nickel oxide (NiOx) compact layer via the sol-gel process to improve the conductivity and to modify its work function. Inverted PSCs with the configuration of FTO/K:NiOx/Cs0.05FA0.81MA0.14Pb(I0.85Br0.15)3/TBABF4+PCBM/TIPD/Ag were fabricated and evaluated. We found that the device based on 3% K-doped NiOx showed the best performance with an optimized PCE of 17.05% and a high fill factor of 74%, and it retained about 80% of initial PCE value after 35 days storage. Our results provide a simple and effective approach to fabricate inverted PSCs with high efficiency and long-term stability for future production.",

keywords = "hole transport layer, inverted perovskite solar cells, nickel oxide, potassium-doped, sol-gel process",

author = "Chen, {Po Chih} and Sheng-Hsiung Yang",

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N2 - Organic/inorganic hybrid perovskites have received a great deal of attention in solar energy harvest due to their high absorbance in the visible range, long carrier diffusion length, and solution processability. It is extremely important to develop high-quality hole transport layer (HTL) to replace PEDOT:PSS for fabricating inverted perovskite solar cells (PSCs) with high power conversion efficiency (PCE) and device stability. Upon this consideration, we proposed potassium (K)-doped nickel oxide (NiOx) compact layer via the sol-gel process to improve the conductivity and to modify its work function. Inverted PSCs with the configuration of FTO/K:NiOx/Cs0.05FA0.81MA0.14Pb(I0.85Br0.15)3/TBABF4+PCBM/TIPD/Ag were fabricated and evaluated. We found that the device based on 3% K-doped NiOx showed the best performance with an optimized PCE of 17.05% and a high fill factor of 74%, and it retained about 80% of initial PCE value after 35 days storage. Our results provide a simple and effective approach to fabricate inverted PSCs with high efficiency and long-term stability for future production.

AB - Organic/inorganic hybrid perovskites have received a great deal of attention in solar energy harvest due to their high absorbance in the visible range, long carrier diffusion length, and solution processability. It is extremely important to develop high-quality hole transport layer (HTL) to replace PEDOT:PSS for fabricating inverted perovskite solar cells (PSCs) with high power conversion efficiency (PCE) and device stability. Upon this consideration, we proposed potassium (K)-doped nickel oxide (NiOx) compact layer via the sol-gel process to improve the conductivity and to modify its work function. Inverted PSCs with the configuration of FTO/K:NiOx/Cs0.05FA0.81MA0.14Pb(I0.85Br0.15)3/TBABF4+PCBM/TIPD/Ag were fabricated and evaluated. We found that the device based on 3% K-doped NiOx showed the best performance with an optimized PCE of 17.05% and a high fill factor of 74%, and it retained about 80% of initial PCE value after 35 days storage. Our results provide a simple and effective approach to fabricate inverted PSCs with high efficiency and long-term stability for future production.

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Potassium-Doped Nickel Oxide as the Hole Transport Layer for Efficient and Stable Inverted Perovskite Solar Cells

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