Efficient and stable perovskite solar cells thanks to dual functions of oleyl amine-coated PbSO4(PbO)4 quantum dots: Defect passivation and moisture/oxygen blocking

Chen, Chong; Li, Fumin; Zhu, Laipan; Shen, Zhitao; Weng, Yujuan; Lou, Qiang; Tan, Furui; Yue, Gentian; Huang, Qingsong; Wang, Mingtai

doi:10.1016/j.nanoen.2019.104313

Cited by 66 publications

(60 citation statements)

References 53 publications

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“…More importantly, the formed Pb−O bonds at the interface can effectively prevent the oxidation of Pb in the perovskite CsFAMA by the O 2 in the air, which is conductive to promoting the chemical stability of the CsFAMA. [ 48,49 ] Figure 6b further shows that the I and Br atoms in the CsFAMA are bonded with the Sn atoms in CSCO. Therefore, the CSCO can well passivate the defect states caused by the absence of halogen atoms in the perovskite, which will further promote the stability of perovskite materials and ultimately improve the stability of device performance.…”

Section: Resultsmentioning

confidence: 94%

Novel Electron Transport Layer Material for Perovskite Solar Cells with Over 22% Efficiency and Long‐Term Stability

Shen

Weng

et al. 2020

Adv Funct Materials

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The electron transport layer (ETL) has an important influence on the power conversion efficiency (PCE) and stability of n-i-p planar perovskite solar cells (PSCs). This paper presents an N-type semiconductor material, (CH 3) 2 Sn(COOH) 2 (abbreviated as CSCO) that is synthesized and prepared for the first time as an ETL for n-i-p planar PSCs, which leads to a high PCE of 22.21% after KCl treatment, one of the highest PCEs of n-i-p planar PSCs to date. Further analysis reveals that the high PCE is attributed to the excellent conductivity of CSCO because of its more delocalized electron cloud distribution due to its unique −O=C−O− group, and to the defect passivation of the Cs 0.05 (FA 0.85 MA 0.15) 0.95 Pb(I 0.85 Br 0.15) 3 (denoted as CsFAMA) perovskite through the interaction between the O (Sn) atoms of CSCO and the Pb (halogen) atoms of CsFAMA at CSCO/CsFAMA interface, while the traditional ETL materials such as SnO 2 film lack this function. In addition to the high PCE, the optimal PSCs using CSCO as ETL show remarkable stability, retaining over 83% of its initial PCE without encapsulation after 130 days of storage in ambient conditions (≈25 °C at ≈40% humidity), much better than the traditional SnO 2-based n-i-p PSCs.

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Section: Resultsmentioning

confidence: 94%

Novel Electron Transport Layer Material for Perovskite Solar Cells with Over 22% Efficiency and Long‐Term Stability

Shen

Weng

et al. 2020

Adv Funct Materials

Self Cite

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“…The large specific surface area, rich surface functional groups, good electrical conductivity, adjustable work function, unique nanosize effects, and surface effects of quantum dots render them suitable for use in solar cells [ 122 , 137 , 138 ]. Quantum dots effectively passivated perovskite crystal defects and promoted the stability of battery performance.…”

Section: Interface Modificationmentioning

confidence: 99%

“…In their study, a PSC comprising PbSO 4 (PbO) 4 with OA coating achieved an efficiency of 20.02%. In addition, a PSC with an OA-coated PbSO 4 (PbO) 4 quantum dot maintained an initial efficiency of 90% after 280 h of operation [ 122 ]. Quantum dots improved the energy level matching at the interface between the HTL and the perovskite layer, thereby ultimately reducing the loss of holes at the interface.…”

Section: Interface Modificationmentioning

confidence: 99%

Review of Interface Passivation of Perovskite Layer

Wang

Liu

et al. 2021

Nanomaterials

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Perovskite solar cells (PSCs) are the most promising substitute for silicon-based solar cells. However, their power conversion efficiency and stability must be improved. The recombination probability of the photogenerated carriers at each interface in a PSC is much greater than that of the bulk phase. The interface of a perovskite polycrystalline film is considered to be a defect-rich area, which is the main factor limiting the efficiency of a PSC. This review introduces and summarizes practical interface engineering techniques for improving the efficiency and stability of organic–inorganic lead halide PSCs. First, the effect of defects at the interface of the PSCs, the energy level alignment, and the chemical reactions on the efficiency of a PSC are summarized. Subsequently, the latest developments pertaining to a modification of the perovskite layers with different materials are discussed. Finally, the prospect of achieving an efficient PSC with long-term stability through the use of interface engineering is presented.

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“…[ 128 ] In the light of theoretical and experimental studies, the uncoordinated Pb 2+ defects can result in the generation of trap states in the bandgap [ 78,120 ] that increase charge recombination through nonradiative channels, ion migration under an applied electric field, and water/oxygen permeation, which greatly degrade the efficiency and stability of PSCs. [ 79,129,130 ] Uncoordinated Pb 2+ ions are capable of accepting electrons, which provides favorable conditions for coordination with Lewis bases. Lewis acids and bases are a kind of typical and effective materials used to passivate undercoordinated sites.…”

Section: Various Types Of Defectsmentioning

confidence: 99%

Toward Efficient and Stable Perovskite Solar Cells: Choosing Appropriate Passivator to Specific Defects

Zhou

et al. 2020

Solar RRL

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Figure 3. The impact of MABr treatment on the scanning electron microscopy (SEM) images of film morphology (MAPbI 3 films a) without and b) with MABr treatment), c) ultraviolet-visible (UV-vis) absorption spectra, and d) XRD patterns of the perovskite films. Reproduced with permission. [61] Copyright 2016, Springer Nature. e) Schematic illustration and f) SEM images of the molecule-passivated RP/3D heterostructure. Reproduced with permission. [115] Copyright 2018, Royal Society of Chemistry. g) Schematic representation of the 1D/3D heterostructure evidenced by solid-state NMR proximity measurements. Reproduced with permission. [40] Copyright 2019, Springer Nature. h) Secondary-ion mass spectrometry (SIMS) measurement of interdiffusion-grown MAPbI 3 films on indium tin oxide (ITO) glass. Reproduced with permission.

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Efficient and stable perovskite solar cells thanks to dual functions of oleyl amine-coated PbSO4(PbO)4 quantum dots: Defect passivation and moisture/oxygen blocking

Cited by 66 publications

References 53 publications

Novel Electron Transport Layer Material for Perovskite Solar Cells with Over 22% Efficiency and Long‐Term Stability

Novel Electron Transport Layer Material for Perovskite Solar Cells with Over 22% Efficiency and Long‐Term Stability

Review of Interface Passivation of Perovskite Layer

Toward Efficient and Stable Perovskite Solar Cells: Choosing Appropriate Passivator to Specific Defects

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