Surface modification induced by perovskite quantum dots for triple-cation perovskite solar cells

Yang, Wenqiang; Su, Rui; Luo, Deying; Hu, Qin; Zhang, Feng; Xu, Zhaojian; Wang, Zhiping; Tang, Jui-Hsiang; Zhao, Ling; Yang, Xiaoyu; Tu, Yongguang; Zhang, Wei; Zhong, Haizheng; Gong, Qihuang; Russell, Thomas P.; Zhu, Rui

doi:10.1016/j.nanoen.2019.104189

Cited by 90 publications

(56 citation statements)

References 37 publications

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“…Similar results using CsPbBr 3 QD were reported by Zhu et al. [ 119 ] Cs + and Br − ions were produced from the decomposition of CsPbBr 3 QDs in the perovskite precursor solution, generating a layer of Cs 1− y MA y PbI 3− x Br x above the perovskite film through ion exchange after annealing (Figure 8c). [ 120 ] The valence band of this layer was located between the perovskite and HTL, which is beneficial for charge collection and transfer.…”

Section: The Progress Of Anti‐solvent Treatmentsupporting

confidence: 86%

Advances in Metal Halide Perovskite Film Preparation: The Role of Anti‐Solvent Treatment

Sun

Yuan

et al. 2021

Small Methods

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In the past decade, hybrid organic‐inorganic perovskite solar cells (PSCs) have attracted significant attention. Since then, the power conversion efficiency has astonishingly reached to 25.5%, situating perovskites at the forefront of all reported solution‐processed photovoltaic materials. The research of PSCs has reached a stage where efficiency, stability, and cost need to be simultaneously considered before reaching the threshold for large‐scale commercialization. In this article, the recent progress in fabricating high‐quality perovskite thin‐films adopting “anti‐solvent” strategy is reviewed and the established nucleation and crystal growth mechanisms during the treatment process is discussed. In addition, present challenges and further opportunities of the anti‐solvent methodology toward efficient and large‐scale PSCs are highlighted. The continuous efforts dedicated to the development of anti‐solvent treatment for fabricating high‐performance large‐area devices may pave the way toward commercial applications of PSCs in the near future.

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Section: The Progress Of Anti‐solvent Treatmentsupporting

confidence: 86%

Advances in Metal Halide Perovskite Film Preparation: The Role of Anti‐Solvent Treatment

Sun

Yuan

et al. 2021

Small Methods

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“…claimed that the performance of PSCs can be improved by the larger size of CsPbBr 3 ‐QDs. [ 39 ] In our work, the difference between QDs average size for QDs‐Cs0 and QDs‐Cs5 is only ≈0.8 nm, the similar size of QDs‐Cs0 and QDs‐Cs5 indicates that the effect of QDs size on the device performance can be considered negligible. Furthermore, as we increase the QDs size by increasing the molar ratio of Cs from 5 to 15% (Figure S5, Supporting Information), the lower PCE is obtained, corroborating the diffusion passivation strategy does not directly depend on the size of QDs.…”

Section: Figurementioning

confidence: 69%

“…Recently, inorganic quantum dots (QDs), such as CsPbBr 3 , have been introduced in OIHP solar cells to minimize non‐radiative recombination sites. [ 38,39 ] The simultaneous realignment of interfacial energy levels on depositing these inorganic QDs resulted in improved PCEs of the fabricated solar cells. [ 40–42 ] However, hitherto, systematic studies on the photophysics and mechanisms governing the QD‐based passivation strategy, are still lacking.…”

Section: Figurementioning

confidence: 99%

Realizing Reduced Imperfections via Quantum Dots Interdiffusion in High Efficiency Perovskite Solar Cells

et al. 2020

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“…Subsequently, tri‐cation perovskites were deposited onto the LDC‐modified substrates using the methods reported in the literatures. [ 35,36 ] Other functional layers were also made in sequence following previously published protocols. [ 6,37 ] The J – V curves were measured with a Keithley 2400 source‐measure unit under dark and green light illumination (520 nm, Shenzhen Optoelectronic Technology Co., Ltd.).…”

Section: Methodsmentioning

confidence: 99%

Low‐Dimensional Contact Layers for Enhanced Perovskite Photodiodes

Luo

Zou

Yang

et al. 2020

Adv Funct Materials

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Controlling defects and energy‐band alignments are of paramount importance to the development of high‐performance perovskite‐based photodiodes. Yet, concurrent improvements in interfacial contacts and defect reduction simply by tailoring bottom contacts have not been investigated. An effective strategy is reported that can simultaneously improve energy‐band alignments and structural defects by introducing low‐dimensional contact (LDC) layers at the bottom interface. It is found that LDC‐based perovskites considerably suppress undesirable structural defects induced by microstrains, resulting in reduced nonradiative recombination centers and improved carrier lifetimes. Additionally, the resulting LDC‐based interface structures help block minority carrier injection from the electrodes by forming built‐in electric fields. As a consequence, LDC‐based perovskite photodiodes showed improved light detection capabilities. The result opens an avenue to yield highly efficient photodiodes.

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Surface modification induced by perovskite quantum dots for triple-cation perovskite solar cells

Cited by 90 publications

References 37 publications

Advances in Metal Halide Perovskite Film Preparation: The Role of Anti‐Solvent Treatment

Advances in Metal Halide Perovskite Film Preparation: The Role of Anti‐Solvent Treatment

Realizing Reduced Imperfections via Quantum Dots Interdiffusion in High Efficiency Perovskite Solar Cells

Low‐Dimensional Contact Layers for Enhanced Perovskite Photodiodes

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