Establishing Multifunctional Interface Layer of Perovskite Ligand Modified Lead Sulfide Quantum Dots for Improving the Performance and Stability of Perovskite Solar Cells

Ma, Ruiman1; Ren, Zhenwei1; Li, Can1; Wang, Yong1; Huang, Zhanfeng1; Zhao, Yong1; Yang, Tingbin2; Liang, Yongye2; Sun, Xiao Wei3; Choy, Wallace C. H.1

2020-09-22

10.1002/smll.202002628

Small   影响因子和分区

1613-6810

1613-6829

While organic-inorganic halide perovskite solar cells (PSCs) show great potential for realizing low-cost and easily fabricated photovoltaics, the unexpected defects and long-term stability against moisture are the main issues hindering their practical applications. Herein, a strategy is demonstrated to address the main issues by introducing lead sulfide quantum dots (QDs) on the perovskite surface as the multifunctional interface layer on perovskite film through establishing perovskite as the ligand on PbS QDs. Meanwhile, the multifunctions are featured in three aspects including the strong interactions of PbS QDs with perovskites particularly at the grain boundaries favoring good QDs coverage on perovskites for ultimate smooth morphology; an inhibition of iodide ions mobilization by the strong interaction between iodide and the incorporated QDs; and the reduction of the dangling bonds of Pb(2+)by the sulfur atoms of PbS QDs. Finally, the device performances are highly improved due to the reduced defects and non-radiative recombination. The results show that both open-circuit voltage and fill factor are significantly improved to the high values of 1.13 V and 80%, respectively in CH3NH3PbI3-based PSCs, offering a high efficiency of 20.64%. The QDs incorporation also enhances PSCs' stability benefitting from the induced hydrophobic surface and suppressed iodide mobilization.

interface layers ion mobilization ligand exchange PbS quantum dots (QDs) perovskite solar cells

SCI ; EI

英语

其他

University Grant Council of the University of Hong Kong[201811159147] ; General Research Fund[17204117][17200518][17201819] ; Collaborative Research Fund from the Research Grants Council (RGC)[C5037-18G] ; Environment and Conservation Fund (ECF Project) of Hong Kong Special Administrative Region, China[64/2018]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000571758500001

WILEY-V C H VERLAG GMBH

20203909232727

Ion exchange ; Sulfur compounds ; Surface chemistry ; Ligands ; Morphology ; Layered semiconductors ; Grain boundaries ; Hydrophobicity ; Nanocrystals ; Open circuit voltage ; Perovskite ; Solar power generation ; Perovskite solar cells ; Semiconductor quantum dots ; Dangling bonds

Minerals:482.2 ; Solar Power:615.2 ; Solar Cells:702.3 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3 ; Crystalline Solids:933.1 ; Materials Science:951

Web of Science

1.Univ Hong Kong, Dept Elect & Elect Engn, Pokfulam Rd, Hong Kong 999077, Peoples R China
2.Southern Univ Sci & Technol China, Shenzhen Key Lab Printed Elect, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Ma, Ruiman,Ren, Zhenwei,Li, Can,et al. Establishing Multifunctional Interface Layer of Perovskite Ligand Modified Lead Sulfide Quantum Dots for Improving the Performance and Stability of Perovskite Solar Cells[J]. Small,2020,16(41).

Ma, Ruiman.,Ren, Zhenwei.,Li, Can.,Wang, Yong.,Huang, Zhanfeng.,...&Choy, Wallace C. H..(2020).Establishing Multifunctional Interface Layer of Perovskite Ligand Modified Lead Sulfide Quantum Dots for Improving the Performance and Stability of Perovskite Solar Cells.Small,16(41).

Ma, Ruiman,et al."Establishing Multifunctional Interface Layer of Perovskite Ligand Modified Lead Sulfide Quantum Dots for Improving the Performance and Stability of Perovskite Solar Cells".Small 16.41(2020).