Interfacial Engineering via Self‐Assembled Thiol Silane for High Efficiency and Stability Perovskite Solar Cells

Shi, Yunfan; Zhang, Huijie; Tong, Xiao-Lan; Hou, Xiaoyi; Li, Fangjie; Du, Yunxiao; Wang, Shaofu; Zhang, Qilin; Liu, Pei; Zhao, Xingzhong

doi:10.1002/solr.202100128

Cited by 29 publications

(25 citation statements)

References 47 publications

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“…[112] SAMs consisting of silane also have been used to enhance device efficiency and stability through passivation of defects and enhanced interfacial adhesion. [114] Yang et al reported that SnO 2 with a silane-based SAM (3-aminopropyltriethoxysilane) can provide better surface wetting property, resulting in more intimate contact between SnO 2 and perovskite with improved perovskite morphology. [115] The silane groups also passivate the defects by reacting with OH groups on SnO 2 , leading to a lower defect concentration and charge recombination.…”

Section: Functional Organic Compoundsmentioning

confidence: 99%

Advances in SnO₂ for Efficient and Stable n–i–p Perovskite Solar Cells

2022

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minimize interfacial charge accumulation and recombination. [9] In an n-i-p-structured PSC, the perovskite layer is coated on the n-type ETL, and the surface area and surface chemistry of the ETL directly affect the deposition and quality of the perovskite layer. Thus, ETL development has become one of the most important scientific subjects for developing highly efficient and stable n-i-p PSCs.To date, the commonly studied ETLs include n-type semiconducting oxides (e.g., TiO 2 , SnO 2 , ZnO, Zn 2 SnO 4 , and BaSnO 3 ) and organics (e.g., phenyl-C 61 -butyric acid methyl ester [PCBM] and C 60 ). [7,[10][11][12][13][14][15][16][17] Key properties of ETLs include the proper band energy alignment with perovskite layer, high transmittance with wide bandgap, and high conductivity. Traditionally, the compact TiO 2 / mesoporous TiO 2 stack was a key component in efficient n-i-p PSCs, owing to its well-established deposition methods and suitable optoelectronic properties. However, TiO 2 exhibits drawbackssuch as photo catalytic properties under illumination and hightemperature annealing required to achieve proper crystallinitywhich can limit PSCs for commercialization. [18] Many researchers have explored alternative candidates to replace TiO 2 , targeting simple and low-temperature fabrication processes with low cost, good reproducibility, and high chemical stability.Among various candidates, SnO 2 stands out as a promising ETL that has received significant attention in recent years, [19][20][21][22] with the best PCE of SnO 2 -based n-i-p PSCs exceeding 25%. [23] The SnO 2 ETL often exhibits several preferred features such as wide bandgap with high transmittance, good charge mobility, proper band offsets relative to common perovskites, low-temperature processable synthesis, and decent chemical stability, all of which make SnO 2 ETLs great candidates for highly efficient and stable PSCs. [24,25] In this review, we highlight the main advances in the develop ment of SnO 2 for highly efficient and stable PSCs, with a focus on the n-i-p device configuration. To help understand the research trend of SnO 2 -based PSCs, we first provide an overview of key approaches leading to record PCEs based on the development of SnO 2 deposition methods in recent years. Next, we focus on the materials chemistry associated with SnO 2 , including defects, intrinsic properties, and impact on device characteristics. We discuss the issues and challenges related to SnO 2 development and SnO 2 /perovskite interface optimization, as well as various strategies developed to address these issues in recent years. We also highlight some SnO 2 implementations related to scalable processes and flexible devices that are Perovskite solar cells (PSCs) based on the regular n-i-p device architecture have reached above 25% certified efficiency with continuously reported improvements in recent years. A key common factor for these recent breakthroughs is the development of SnO 2 as an effective electron transport layer in these devices. In this article, the key ad...

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Section: Functional Organic Compoundsmentioning

confidence: 99%

Advances in SnO₂ for Efficient and Stable n–i–p Perovskite Solar Cells

2022

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“…The perovskite light-absorbing layer prepared by the solution method may have considerable defects, which not only become the center of carrier recombination, leading to a decrease in device efficiency but also easily cause device degradation, reducing the stability the devices. [126][127][128][129][130][131][132] Zhou et al [19] introduced inorganic Eu 3þ -Eu 2þ ion pair in PbI 2 solution. The results showed that the Pb 0 and I 0 defects in the perovskite were passivated during the redox process of europium (Figure 7a,b).…”

Section: Additives In Inorganic Componentsmentioning

confidence: 99%

Review of Two‐Step Method for Lead Halide Perovskite Solar Cells

et al. 2022

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The quality of the perovskite film is crucial to the technological breakthrough of perovskite solar cells (PSCs). The two‐step method can facilitate the formation of a perovskite film with high quality and reproducibility. Many milestones have been made in the development of hybrid lead halide PSCs by using the two‐step method, which has a significant impact on their practical application. Herein, the reaction mechanism of the two‐step method including two‐step immersion method and two‐step spin coating method is summarized. The strategies such as component engineering, solvent engineering, and additive engineering of the two‐step method in preparing high‐quality films are introduced systematically and in detail. In addition, current issues of the two‐step method and its applications in lead‐free PSCs, all‐inorganic PSCs, large areas, and tandems are introduced and some suggestions are put forward for future research.

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“…8d). 81 The average PCE of such PSCs utilizing MPTMS was significantly increased from 16.62% to 18.75% in the device prepared via a two-step process. The modified PSC obtained a maximum efficiency of more than 20% with favorable stability in ambient air (Fig.…”

Section: Interfacial Engineering In the Normal Structurementioning

confidence: 94%