Rational Unraveling of Alkali Metal Concentration-Dependent Photovoltaic Performance of Halide Perovskites: Octahedron Distortion vs Surface Reconstruction

2022 ◽  
pp. 362-370
Author(s):  
Zhaobo Zhou ◽  
Ming-Gang Ju ◽  
Jinlan Wang
Keyword(s):  
Alkali Metal ◽  
Metal Concentration ◽  
Surface Reconstruction ◽  
Photovoltaic Performance ◽  
Halide Perovskites

Modulations of various alkali metal cations on organometal halide perovskites and their influence on photovoltaic performance

Nano Energy ◽  
2018 ◽  
Vol 45 ◽  
pp. 184-192 ◽  
Author(s):  
Zeguo Tang ◽  
Satoshi Uchida ◽  
Takeru Bessho ◽  
Takumi Kinoshita ◽  
Haibin Wang ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Photovoltaic Performance ◽  
Metal Cations ◽  
Alkali Metal Cations ◽  
Halide Perovskites

scholarly journals Surface Reconstruction of Halide Perovskites During Post-treatment

2021 ◽  
Author(s):  
Shaun Tan ◽  
Tianyi Huang ◽  
Ilhan Yavuz ◽  
Rui Wang ◽  
Marc H. Weber ◽  
...  
Keyword(s):  
Surface Reconstruction ◽  
Post Treatment ◽  
Halide Perovskites

Enhancing the photovoltaic performance of planar heterojunction perovskite solar cells by doping the perovskite layer with alkali metal ions

2016 ◽  
Vol 4 (42) ◽  
pp. 16546-16552 ◽  
Author(s):  
Jingjing Chang ◽  
Zhenhua Lin ◽  
Hai Zhu ◽  
Furkan Halis Isikgor ◽  
Qing-Hua Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Alkali Metal ◽  
Metal Ions ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Alkali Metal Ions ◽  
Perovskite Layer ◽  
Photovoltaic Efficiency ◽  
Planar Heterojunction

Doping the perovskite layer with a small amount of alkali metal ions can enhance the photovoltaic efficiency of perovskite solar cells.

scholarly journals Alkali Metal Cation Incorporated Ag3BiI6 Absorbers for Efficient and Stable Rudorffite Solar Cells

2021 ◽  
Author(s):  
Ming-Chung Wu ◽  
Ruei-Yu Kuo ◽  
Yin-Hsuan Chang ◽  
Shih-Hsuan Chen ◽  
Ching-Mei Ho​ ◽  
...  
Keyword(s):  
Solar Cells ◽  
Alkali Metal ◽  
Carrier Transport ◽  
Short Circuit ◽  
Alkali Metal Cation ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Ambient Conditions ◽  
Kelvin Probe

Abstract Objectives Toxic lead and poor stability are the main obstacles of perovskite solar cells. Lead-free silver bismuth iodide (SBI) was first attempted as solar cells photovoltaic materials in 2016. However, the short-circuit current of the SBI rudorffite materials is commonly below 10 mA/cm2, limiting the overall photovoltaic performance. Here, we present a chemical composition engineering to enhance the photovoltaic performance. Methods In this study, we incorporated a series of alkali metal cations (Li+, Na+, K+, Rb+, and Cs+) into Ag3BiI6 absorbers to investigate the effects on the photovoltaic performance of rudorffite solar cells. Results Cs+ doping improved VOC and Na+ doping showed an obvious enhancement in JSC. Therefore, we co-doped Na+ and Cs+ into SBI (Na/Cs-SBI) as the absorber and investigated the crystal structure, surface morphology, and optical properties. The photo-assisted Kelvin probe force microscopy (photo-KPFM) was used to measure surface potential and verified that Na/Cs doping could reduce the electron trapping at the grain boundary and facilitate electron transportation. Conclusion Na/Cs-SBI reduced the electron-holes pairs recombination and promoted the carrier transport of rudorffite solar cells. Finally, the Na/Cs-SBI rudorffite solar cell exhibited a PCE of 2.50%, a 46.0% increase to the SBI device (PCE = 1.71%), and was stable in ambient conditions for over 6 months.

Alkaline Hydroxide Induced High Level of Alkali Metal Concentration Effect on the Characteristics of LTO Layer

2019 ◽  
Vol 16 (28) ◽  
pp. 37-42
Author(s):  
Jang-Seop Kim ◽  
Woo-Hyun Seo ◽  
Woo-Sung Lee ◽  
Don-Ha Hwang ◽  
Bo-Young Lee
Keyword(s):  
Alkali Metal ◽  
Metal Concentration ◽  
Concentration Effect ◽  
High Level

scholarly journals First-principles identification of the charge-shifting mechanism and ferroelectricity in hybrid halide perovskites

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Bumseop Kim ◽  
Jeongwoo Kim ◽  
Noejung Park
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
High Power Conversion Efficiency ◽  
Electronic Band ◽  
Guiding Principle ◽  
Molecular Cation ◽  
Spatial Charge ◽  
Halide Perovskites ◽  
Halide Perovskite

AbstractHybrid halide perovskite solar cells have recently attracted substantial attention, mainly because of their high power conversion efficiency. Among diverse variants, (CH3NH3)PbI3 and HC(NH2)2PbI3 are particularly promising candidates because their bandgap well matches the energy range of visible light. Here, we demonstrate that the large nonlinear photocurrent in β-(CH3NH3)PbI3 and α-HC(NH2)2PbI3 is mostly determined by the intrinsic electronic band properties near the Fermi level, rooted in the inorganic backbone, whereas the ferroelectric polarization of the hybrid halide perovskite is largely dominated by the ionic contribution of the molecular cation. The spatial charge shift upon excitation is attributed to the charge transfer from iodine to lead atoms in the backbone, which is independent of the presence of the cationic molecules. Our findings can serve as a guiding principle for the design of future materials for halide-perovskite solar cells with further enhanced photovoltaic performance.

Metal halide perovskites under compression

2019 ◽  
Vol 7 (27) ◽  
pp. 16089-16108 ◽  
Author(s):  
Qian Li ◽  
Liming Zhang ◽  
Zhongwei Chen ◽  
Zewei Quan
Keyword(s):  
High Pressure ◽  
Photovoltaic Performance ◽  
Metal Halide ◽  
Halide Perovskites

High pressure engineering of metal halide perovskites, revealing the structural and photovoltaic performance contributions of different components.

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