Organic–inorganic lead halide perovskites have attracted great interest as low-cost and high efficiency solar cells. However, the excessive surface defects of perovskite crystal grains are still a crucial factor that limits further improvement in the performance of corresponding devices. Here, we introduce potassium chloride (KCl) into the precursor of a triple A-cation mixed-halide perovskite to passivate the surface defects and provide an insight into the underlying passivation mechanism of this common salt. We reveal that KCl exists on the surface of perovskite grains, suppressing the grain surface defects and modulating the energy level alignment of the perovskite solar cell (PSC). KCl added PSCs achieved a high open circuit voltage of 1.162 V compared with that of a control device (1.087 V), due to suppressed non-radiative recombination losses. Our work investigates the synergetic effect of K+ and Cl− on the enhancement of the device performance and provides an effective strategy of defect passivation toward highly efficient perovskite solar cells.
Skip Nav Destination
Defect passivation of grain surface toward perovskite solar cells with a high open-circuit voltage exceeding 1.16 V
,
,
,
,
,
Article navigation
28 July 2020
Research Article|
July 23 2020
Defect passivation of grain surface toward perovskite solar cells with a high open-circuit voltage exceeding 1.16 V
Available to Purchase
Special Collection:
Hybrid Organic-Inorganic Halide Perovskites
Nana Wang;
Nana Wang
School of Materials and Energy, University of Electronic Science and Technology of China
, Chengdu 611731, People’s Republic of China
Search for other works by this author on:
Yifeng Zhang;
Yifeng Zhang
School of Materials and Energy, University of Electronic Science and Technology of China
, Chengdu 611731, People’s Republic of China
Search for other works by this author on:
Peng Zeng;
Peng Zeng
School of Materials and Energy, University of Electronic Science and Technology of China
, Chengdu 611731, People’s Republic of China
Search for other works by this author on:
Yuchao Hu;
Yuchao Hu
School of Materials and Energy, University of Electronic Science and Technology of China
, Chengdu 611731, People’s Republic of China
Search for other works by this author on:
Faming Li;
Faming Li
School of Materials and Energy, University of Electronic Science and Technology of China
, Chengdu 611731, People’s Republic of China
Search for other works by this author on:
Mingzhen Liu
Mingzhen Liu
a)
School of Materials and Energy, University of Electronic Science and Technology of China
, Chengdu 611731, People’s Republic of China
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
Nana Wang
Yifeng Zhang
Peng Zeng
Yuchao Hu
Faming Li
Mingzhen Liu
a)
School of Materials and Energy, University of Electronic Science and Technology of China
, Chengdu 611731, People’s Republic of China
a)Author to whom correspondence should be addressed: [email protected]
Note: This paper is part of the special collection on Hybrid Organic-Inorganic Halide Perovskites
J. Appl. Phys. 128, 044504 (2020)
Article history
Received:
April 28 2020
Accepted:
June 20 2020
Citation
Nana Wang, Yifeng Zhang, Peng Zeng, Yuchao Hu, Faming Li, Mingzhen Liu; Defect passivation of grain surface toward perovskite solar cells with a high open-circuit voltage exceeding 1.16 V. J. Appl. Phys. 28 July 2020; 128 (4): 044504. https://doi.org/10.1063/5.0012141
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
A step-by-step guide to perform x-ray photoelectron spectroscopy
Grzegorz Greczynski, Lars Hultman
Piezoelectric thin films and their applications in MEMS: A review
Jinpeng Liu, Hua Tan, et al.
Tutorial: Simulating modern magnetic material systems in mumax3
Jonas J. Joos, Pedram Bassirian, et al.
Related Content
An experimental study on the molecular organization and exciton diffusion in a bilayer of a porphyrin and poly(3-hexylthiophene)
J. Appl. Phys. (August 2008)
Atomic-scale understanding on the physics and control of intrinsic point defects in lead halide perovskites
Appl. Phys. Rev. (July 2021)
Molecular passivation of MAPbI3 perovskite films follows the Langmuir adsorption rule
Appl. Phys. Lett. (September 2021)
Positive temperature coefficient of photovoltaic efficiency in solar cells based on InGaN/GaN MQWs
Appl. Phys. Lett. (August 2016)
Moisture assisted perovskite film growth for high performance solar cells
Appl. Phys. Lett. (November 2014)